Seungyoung Ahn 

연구분야 > 친환경 모빌리티 기술전임교수 (en)

Office

F402

Tel

1263

Summary

Research Interest

Wireless Power Transfer System, Electromagnetic Compatibility, Signal Integrity and Power Integrity, High Bandwidth Memory and Package, Electric Vehicles

Education

Ph.D. in Electrical Engineering, Aug. 2005. 

    • KAIST (Korea Advanced Institute of Science and Technology), Daejeon, Korea
    • Thesis Title: Frequency Domain Optimization of Equalizer for High-Speed Differential Interconnection using Active Filter and Reactive Termination Technique
    • Advisor: Prof. Joungho Kim

M.S. in Electrical Engineering, Feb. 2000. 

    • KAIST (Korea Advanced Institute of Science and Technology), Daejeon, Korea
    • Thesis Title: Microwave Frequency Modeling of Next Generation High-density Packages
    • Advisor: Prof. Joungho Kim

B.S. in Electrical Engineering, Feb. 1998. 

    • KAIST (Korea Advanced Institute of Science and Technology), Daejeon, Korea

Biography

Seungyoung Ahn received the B.S., M.S., and Ph.D. degrees in electrical engineering from the Korea Advanced Institute of Science and Technology (KAIST), Daejeon, South Korea, in 1998, 2000, and 2005, respectively. From 2005 to 2009, he was a Senior Engineer with Samsung Electronics, Suwon, South Korea, where he was in the charge of high-speed board design for laptop computer systems. He is currently a Professor with CCS Graduate School of Mobility, KAIST. His research interests include wireless power transfer system design and electromagnetic compatibility design for electric vehicle and high-performance digital systems.

Publication

International Journal Papers

  1. Yujun Shin, Seongho Woo, Changmin Lee, Jaiwoong Jeong, Gyumin Kwak, Seungyoung Ahn, “Design of a Wireless Power Transfer System with Two Inputs with Large Voltage Differences for Missiles Mounted on Maritime Vessels,” IEEE Access, Early Access, Jun, 2022.
  2. Seunghun Ryu, Kibeom Kim, Jang-Yeol Kim, In-Kui Cho, Haerim Kim, Jangyong Ahn, Junsung Choi and Seungyoung Ahn, “Design and Analysis of a Magnetic Field Communication System using a Giant Magneto-Impedance Sensor,” IEEE Access, vol. 10, pp. 56961-56973, May, 2022.
  3. Yujun Shin, Seongho Woo, Jaewon Rhee, Changmin Lee, Haerim Kim, Sungryul Huh, Bumjin Park, Seungyoung Ahn, “Accurate Method for Extracting the Coupling Coefficient of an LCC-Series Wireless Power Transfer System,” IEEE Transactions on Power Electronics, Early Access, Apr. 2022.
  4. Seokhyeon Son, Yujun Shin, Seongho Woo, and Seungyoung Ahn, “Sensor Coil System for Misalignment Detection and Information Transfer in Dynamic Wireless Power Transfer of Electric Vehicle” Journal of Electromagnetic Engineering and Science., vol. 22, no. 3, pp. 309-318, 2022.
  5. Seokhyeon Son, Seongho Woo, Haerim Kim, Jangyong Ahn, Sungryul Huh, Sanguk Lee, Seungyoung Ahn, “Shielding Sensor Coil to Reduce the Leakage Magnetic Field and Detect the Receiver Position in Wireless Power Transfer System for Electric Vehicle,” Energies, Vol. 15, No. 7, Mar. 2022
  6. Jangyong Ahn, Jedok Kim, Dongryul Park, Sun-eui Hong, Hyungdo Choi and Seungyoung Ahn, “Active Shield Control Method for Wireless Power Transfer System Under Misalignment Condition,” Journal of Electromagnetic Engineering and Science, vol. 22, no. 2, pp. 171-177, Mar. 2022.
  7. Junsung Choi, Dongryul Park, Suil Kim and Seungyoung Ahn, “Implementation of a Noise-Shaped Signaling System through Software-Defined Radio”, Applied Science, vol. 12, no. 2, p.641, Jan. 2022.
  8. Dongwook Kim, Jangyong Ahn, and Seungyoung Ahn, “Propulsion of Magnetic Material Applied Microrobot in a Tube based on Wireless Power Transfer System,” Journal of Electromagnetic Engineering and Science, vol. 22, no. 1, pp. 56-63, Jan. 2022.
  9. Jaewon Rhee, Yujun Shin, Seongho Woo, Changmin Lee, Dongwook Kim, Jangyong Ahn, Haerim Kim, and Seungyoung Ahn, “Wireless Torque and Power Transfer Using Multiple Coils with LCC‐S Topology for Implantable Medical Drug Pump,” Sensors, Vol. 21, No. 8150, Nov. 2021.
  10. Junsung Choi, Junsung Choi, Vuk Marojevic, Carl B. Dietrich, and Seungyoung Ahn, “DSRC-Enabled Train Safety Communication System at Unmanned Crossings,” IEEE Transactions on Intelligent Transportations Systems, doi: 10.1109/TITS.2022.3159778, Aug. 2021.
  11. Jangyong Ahn, Seon-Eui Hong, Haerim Kim, Kyunghwan Song, Hyung-Do Choi, and Seungyoung Ahn, “Improved Calculation Method of Coupling Factors for Low-Frequency Wireless Power Transfer Systems”, International Journal of Environmental Research and Public Health, Vol. 44, No. 44, Dec. 2021.
  12. Akimasa Hirata, Yinliang Diao, Teruo Onishi, Kensuke Sasaki, Seunyoung Ahn, Davide Colombi, Valerio De Santis, Ilkka Laakso, Luca Giaccone, Wout JosephEssam A. Rashed, Wolfgang Kainz, Ji Chen, “Assessment of Human Exposure to Electromagnetic Fields: Review and Future Directions,” IEEE Transactions on Electromagnetic Compatibility, vol. 63, no. 5, pp. 1619-1630, Oct. 2021
  13. Jedok Kim and Seungyoung Ahn, “Dual Loop Reactive Shield Application of Wireless Power Transfer System for Leakage Magnetic Field Reduction and Efficiency Enhancement,” IEEE Access, vol. 9, pp. 118307-118323, Aug. 2021.
  14. Kyunghwan Song, Jongwook Kim, Hyunwoong Kim., Seonghi Lee, Jangyong Ahn, Andres Brito, Hyunsik Kim, Minho Park, and Seungyoung Ahn, “Modeling, Verification, and Signal Integrity Analysis of High-Speed Signaling Channel with Tabbed Routing in High Performance Computing Server Board,” Electronics, vol. 10, no. 13, Jul. 2021.
  15. Kibeom Kim, Seunghun Ryu, Jang-Yeol Kim, In-Kui Cho, Hyun-Joon Lee, Jaewoo Lee, and Seungyoung Ahn, “Giant Magnetoimpedance Receiver with A Double-Superheterodyne Topology for Magnetic Communication,” IEEE Access, vol. 9, pp. 82903-82908, Jun. 2021.
  16. Bumjin Park, Sungryul Huh, Jongwook Kim, Haerim Kim, Yujun Shin, Seongho Woo, Jaehyoung Park, Andres Brito, Dongwook Kim, Hyun Ho Park, Ok Hyun Jeong, Jin Ouk Kim, Ja-il Koo, and Seungyoung Ahn, “The Magnetic Energy Harvester with Improved Power Density Using Saturable Magnetizing Inductance Model for Maintenance Applications Near High Voltage Power Line,” IEEE Access, vol. 9, pp. 82661-82674, Jun. 2021.
  17. Dongryul Park, Jangyong Ahn, Chungjae Choe, Seongho Woo, Seungyoung Ahn, and Junsung Choi, “A Noise-Shaped Signaling Method for Vehicle-to-Everything Security,” IEEE Access, vol. 9, pp. 75385-75397, May 2021.
  18. Yujun Shin, Jaehyoung Park, Haerim Kim, Seongho Woo, Bumjin Park, Sungryul Huh, Changmin Lee, and Seungyoung Ahn, “Design Considerations for Adding Series Inductors to Reduce Electromagnetic Field Interference in an Over-Coupled WPT System,” Energies, vol. 14, no. 10, Apr. 2021.
  19. Sangwook Park and Seungyoung Ahn, “Novel Resonance-Based Wireless Power Transfer Using Mixed Coupling,” Sensors, vol. 20, no. 24, pp. 7277, Dec. 2020.
  20. Jang-Yeol Kim, In-Kui Cho, Hyun Joon Lee, Jaewoo Lee, Jung-Ick Moon, Seong-Min Kim, Sang-Won Kim, Seungyoung Ahn, and Kibeom Kim, “A Novel Experimental Approach to the Applicability of High-Sensitivity Giant Magneto-Impedance Sensors in Magnetic Field Communication,” IEEE Access, vol. 8, pp. 193091-193101, Oct. 2020.
  21. Jaeyong Cho, Jangyong Ahn, Jongwook Kim, Jaehyoung Park, Yujun Shin, Kibeom Kim, Junsung Choi, and Seungyoung Ahn, “Low and High-Frequency Extrapolation of Band-limited Frequency Responses to Extract Delay Causal Time Responses,” IEEE Transactions on Electromagnetic Compatibility, vol. 63, no. 3, pp. 888-901, Oct. 2020.
  22. Junsung Choi, Vuk Marojevic, Carl Dietrich, Jeffrey Reed, and Seungyoung Ahn, “Survey of Spectrum Regulation for Intelligent Transportation Systems,” IEEE Access, vol. 8, pp. 140145-140160, Jul. 2020.
  23. Chungjae Choe, Jangyong Ahn, Junsung Choi, Dongryul Park, Minjun Kim, Seungyoung Ahn, “A Robust Chanel Access using Cooperative Reinforcement Learning for Congested Vehicular Networks,” IEEE Access, vol. 8, pp. 135540-135557, Jul. 2020.
  24. Jedok Kim, Kibeom Kim, Jangyong Ahn, and Seungyoung Ahn, “A coil design and control method of independent active shielding system for leakage magnetic field reduction of wireless UAV charger,” IEICE Transactions on Communications, vol. E103.B, No. 9 pp. 889-898, Jun. 2020.
  25. Chanjun Park, Jaehyoung Park, Yujun Shin, Jongwook Kim, Sungryul Huh, Dongwook Kim, and Seungyoung Ahn, “Separated Circular Capacitive Coupler for Reducing Cross-Coupling Capacitance in Drone Wireless Power Transfer System,” IEEE Transactions on Microwave Theory and Techniques, vol. 68, no. 9, pp. 3978-3985, May 2020.
  26. Jangyong Ahn, Seon-Eui Hong, Haerim Kim, Yangbae Chun, Hyung-Do Choi, Kibeom Kim, Brito Andrés, Junsung Choi, and Seungyoung Ahn, “Compliance Testing for Human Body Model Exposure to Electromagnetic Fields from a High-power Wireless Charging System for Drones,” Radiation Protection Dosimetry, vol. 189, no. 1, Mar. 2020.
  27. Amirhossein Hajiaghajani, Dongwook Kim, and Seungyoung Ahn, “Patterned Magnetic Fields for Remote Steering and Wireless Powering to a Swimming Microrobot,” IEEE-ASME Transactions on Mechatronics, vol. 25, no. 1, pp. 207 – 216, Feb. 2020.
  28. Junho Kim, Hyeok Kim, Dongwook Kim, Hun-Jun Park, Kiwon Ban, Seungyoung Ahn, and Sung-Min Park, “A Wireless Power Transfer based Implantable ECG Monitoring Device,” Energies, vol. 13, pp. 1-16, Jan. 2020.
  29. Dongwook Kim, Dawon Jeong, Jongwook Kim, Haerim Kim, Junho Kim, Sung-Min Park, and Seungyoung Ahn, “Design and implementation of a wireless charging based cardiac monitoring system focused on temperature reduction and robust power transfer efficiency,” Energies, vol. 13, pp.1-17, Jan. 2020.
  30. Dongwook Kim, Jaehyoung Park, Bumjin Park, Yujun Shin, Kibeom Kim, Hyun Ho Park, and Seungyoung Ahn “Propulsion and Rotation of Microrobot Based on a Force on a Magnetic Material in a Time-Varying Magnetic Field Using Wireless Power Transfer System,” IEEE Transactions on Magnetics, vol. 56, no. 1, Jan. 2020.
  31. Suna Choi, Seungkeun Park, Kyu-Min Kang, and Seungyoung Ahn, “Analysis of Spectrum Requirements for Autonomous Driving Using SINR Probability Distributions,” IEEE Communications Letters, vol. 24, no. 1, pp. 202-206, Jan. 2020.
  32. Dongwook Kim, Hongseok Kim, Anfeng Huang, Qiusen He, Hanyu Zhang, Seungyoung Ahn, Yuyu Zhu, and Jun Fan, “Analysis and Introduction of Effective Permeability with Additional Air-Gaps on Wireless Power Transfer Coils for Electric Vehicle Based on SAE J2954 Recommended Practice,” Energies, vol. 12, no. 24, pages 1-11, Dec. 2019.
  33. Seokwoo Hong, Youngwoo Kim, Seongsoo Lee, Seungtaek Jeong, Boogyo Sim, Hongseok Kim, Jinwook Song, Seungyoung Ahn, and Joungho Kim, “A Frequency-Selective EMI Reduction Method for Tightly Coupled Wireless Power Transfer Systems Using Resonant Frequency Control of a Shielding Coil in Smartphone Application,” IEEE Transactions on Electromagnetic Compatibility, vol. 61, no. 6, pp. 2031-2039, Dec. 2019. 
  34. Jongwook Kim, Kibeom Kim, Haerim Kim, Dongwook Kim, and Seungyoung Ahn, “An Efficient Modeling for Underwater Wireless Power Transfer Using Z-parameter,” IEEE Transactions on Electromagnetic Compatibility, vol. 61, no. 6, pp. 2006-2014, Dec. 2019.
  35. Jaeyong Cho, Karam Hwang, Seungil Jeung, and Seungyoung Ahn, “An Efficient Extrapolation Method of Band-limited S-parameters for Extracting Causal Impulse Responses,” IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems, vol. 38, no. 11, pp. 2086-2098, Nov. 2019.
  36. Kibeom Kim, Junsung Choi, Seongho Woo, Jaeyong Cho, and Seungyoung Ahn, “E-field induced keep-out zone determination method of through-silicon vias for 3-D ICs,” Microelectronics Reliability, vol. 98, pp. 161-164, Jul. 2019.
  37. Seongsoo Lee, Donghyun Kim, Yeonje Cho, Hongseok Kim, Chiuk Song, Seungtaek Jeong, Jinwook Song, Gyeyoung Park, Seokwoo Hong, Junyong Park, Kyungjun Cho, Hyunsuk Lee, Chulhun Seo, Seungyoung Ahn, and Joungho Kim, “Low Leakage Electromagnetic Field level and High Efficiency using a Novel Hybrid Loop-array Design for Wireless High Power Transfer System,” IEEE Transactions on Industrial Electronics, vol. 66, no. 6, pp. 4356-4367, Jun. 2019.
  38. Hyun Ho Park and Seungyoung Ahn, “Millimeter-Wave Scattering and Transmission of Misaligned Dual Metallic Grating Screens,” IEICE Transactions on Communications, E102B, no. 6, pp. 1180-1187, Jun. 2019.
  39. Jaehyoung Park, Chanjun Park, Yujun Shin, Dongwook Kim, Bumjin Park, Jaeyong Cho, Junsung Choi, and Seungyoung Ahn, “Planar multiresonance reactive shield for reducing electromagnetic interference in portable wireless power charging application,” Applied Physics Letters, 114, 203902, May 2019.
  40. Amirhossein Hajiaghajani and Seungyoung Ahn, “Single-sided Nearfield Wireless Power Transfer by a Three Dimensional Coil Array,” Micromachines, vol. 10, no. 3, Mar. 2019.
  41. Yujun Shin, Karam Hwang, Jaehyoung Park, Dongwook Kim, and Seungyoung Ahn, “Precise Vehicle Location Detection Method Using a Wireless Power Transfer (WPT) System” IEEE Transactions on Vehicular Technology, vol. 68, no. 2, pp. 1167-1177, Feb. 2019.
  42. Karam Hwang, Jaeyong Cho, Jaehyoung Park, Dongsoo Har, and Seungyoung Ahn, “Ferrite Position Identification System Operating with Wireless Power Transfer for Intelligent Train Position Detection,” IEEE Transactions on Intelligent Transportation Systems, vol. 20, no. 1, pp. 374-382, Jan. 2019.
  43. Jaehyoung Park, Jonghoon Kim, Yujun Shin, Bumjin Park, Won-Seok Kim, Seok-Jong Cheong, and Seungyoung Ahn, “Toroidal Shaped Coils for a Wireless Power Transfer System for Unmanned Aerial Vehicle,” Journal of Electromagnetic Engineering and Science, vol. 19, no. 1, pp. 48-55, Jan. 2019.
  44. Ki-Cheol Yoon, Seungyoung Ahn, and Jong-Chul Lee, “A Compact Low Phase Noise Oscillator Using Network and Complimentary MNZ Metamaterial Resonator,” Microwave and Optical Technology Letters, vol. 61, no. 1, 9-14, Jan. 2019.
  45. Ki-Cheol Yoon, Seungyoung Ahn, and Jong-Chul Lee, “Elliptic Function Compact-size of the Band-pass Filter Using Complimentary MNZ metamaterial Resonator,” Microwave and Optical Technology Letters, vol. 60, no. 12, pp. 2907-2912, Oct. 2018.
  46. Ki-Cheol Yoon, Seungyoung Ahn, and Jong-Chul Lee, “Wide Band Compact Coplanar Waveguide with IDC Using Left-handed Metamaterial,” Microwave and Optical Technology Letters, vol.60, no. 8, pp. 2030-2033, 2018.
  47. Kibeom Kim, Jangyong Ahn, and Seungyoung Ahn, “Detection of the Interface Trap Charge Density and Lateral Nonuniformity of Through-Silicon Vias,” IEEE Microwave and Wireless Components Letters, vol. 28, no. 5, pp. 422-424, May 2018.
  48. Ki Jin Han and Seungyoung Ahn, “Foreword: Special Section on Recent Progress in the Electrical Design of Advanced Package and Systems (Part 2),” IEEE Transactions on Components Packaging and Manufacturing Technology, vol. 8, no. 4, pp. 509-510, Apr. 2018.
  49. Kibeom Kim, Jedok Kim, Hongkyun Kim, and Seungyoung Ahn, “Rigorous Mathematical Model of Through-Silicon Via (TSV) Capacitance,” IET Circuits, Devices & Systems, Mar. 2018.
  50. Hyun-Ho Park and Seungyoung Ahn, “Steerable Electromagnetic Transmission of Metal Gratings on a Magnetized Ferrite Slab,” IEEE Trans. on Magnetics, vol. 54, no. 3, Mar. 2018.
  51. Chiuk Song, Hongseok Kim, Youngwoo Kim, Donghyun Kim, Seungtaek Jeong, Yeonje Cho, Seongsoo Lee, Seungyoung Ahn, and Joungho Kim, “EMI Reduction Methods in Wireless Power Transfer System for Drone Electrical Charger using Tightly-coupled Three-phase Resonant Magnetic Field,” IEEE Transactions on Industrial Electronics, vol. 65, no. 9, pp. 6839-6849, Jan. 2018.
  52. Bumjin Park, Dongwook Kim, Jaehyoung Park, Kibeom Kim, Jay Koo, Hyun Ho Park, and Seungyoung Ahn, “Optimization design of toroidal core for magnetic energy harvesting near power line by considering saturation effect,” AIP Advances, vol. 8, 056728, Jan. 2018.
  53. Dongwook Kim, Bumjin Park, Jaehyoung Park, Hyun Ho Park, and Seungyoung Ahn, “Magnetic field concentration using ferromagnetic material to propel a wireless power transfer based micro-robot,” AIP Advances, vol. 8, 056723, Jan. 2018.
  54. Ki Jin Han and Seungyoung Ahn, “Foreword: Special Section on Recent Progress in the Electrical Design of Advanced Package and Systems,” IEEE Transactions on Components Packaging and Manufacturing Technology, vol. 8, no. 4, pp. 509-510, Jan. 2018.
  55. Seungyoung Ahn, “2017 Asia-Pacific International Symposium on EMC (APEMC), Seoul, Korea,” IEEE Electromagnetic Compatibility Magazine, vol. 6, no. 3, pp. 98-103, Nov. 2017.
  56. Karam Hwang, Dongwook Kim, Dongsoo Har, and Seungyoung Ahn, “Pickup Coil Counter for Detecting the Presence of Trains Operated by Wireless Power Transfer, IEEE Sensors Journal, vol. 17, no. 22, pp. 7526-7532, Nov. 2017.
  57. Jaeyong Cho, Byung-Sung Kim, Jonghyuck Jung, Joonsung Kim, Kibeom Kim, Karam Hwang, Hwiseob Lee, Seungil Jeung and Seungyoung Ahn, “A Two-line Time-domain Gating Method for Characterization of Test Fixture with Via-hole Discontinuity,” IEEE Microwave and Wireless Components Letters, Vol. No. 10, pp. 936-938, Oct. 2017.
  58. Bumjin Park, Jaehyoung Park, Yujun Shin, Chanjun Park, Jonghyeon Jeong, Kyung Sub Lee, Seungyoung Ahn, and Il Song Han, “Wireless Charging System Using Soft Magnetic Composite for Unmanned Aerial Vehicle,” International Journal of Communications, vol. 2, Oct. 2017.
  59. Dongwook Kim, Karam Hwang, Jaehyoung Park, Hyun Ho Park, and Seungyoung Ahn, “Miniaturization of Implantable Micro-robot Propulsion Using Wireless Power Transfer System,” Micromachines, vol. 8, no. 9, Sep. 2017.
  60. Myunghoi Kim and Seungyoung Ahn, “A Compact and Multi-Stack Electromagnetic Bandgap Structure for Gigahertz Noise Suppression in Multilayer Printed Circuit Boards,” Applied Sciences, vol. 7, no. 8, 804, Aug. 2017.
  61. Hyun Ho Park, Jong Hwa Kwon, and Seungyoung Ahn, “A Simple Equivalent Circuit Model for Shielding Analysis of Magnetic Sheets Based on Microstrip Line Measurement,” IEEE Transactions on Magnetics, vol. 53, no. 6, pp. 1-4, Jun. 2017.
  62. Dongwook Kim, Karam Hwang, Jaehyoung Park, Hyun Ho Park, and Seungyoung Ahn, “High Efficiency Wireless Power and Force Transfer for a Micro-robot using a Multi-axis AC/DC Magnetic Coil,” IEEE Trans. on Magnetics, vol. 53, no. 6, Jun. 2017.
  63. Karam Hwang, Jaehyoung Park, Dongwook Kim, Hyun Ho Park, Jong Hwa Kwon, Sang Il Kwak, and Seungyoung Ahn, “An Autonomous Coil Alignment System for the Dynamic Wireless Charging of Electric Vehicles to Minimize Lateral Misalignment,” Energies, vol. 10, no. 3, Mar. 2017.
  64. Seung Beop Lee, Seungyoung Ahn, and In Gwun Jang, “Simulation-Based Feasibility Study on the Wireless Charging Railway System with a Ferriteless Primary Module,” IEEE Transactions on Vehicular Technology, vol. 66, no. 2, pp. 1004-1010, Feb. 2017.
  65. Jaehyoung Park, Dongwook Kim, Hyun Ho Park, Jong Hwa Kwon, Sang Il Kwak, and Seungyoung Ahn, “A Resonant Reactive Shielding for Planar Wireless Power Transfer System in Smart Phone Application,” IEEE Transactions on Electromagnetic Compatibility, vol. 59, no. 2, pp. 695-703, Jan. 2017.
  66. Hyun Ho Park, Jong Hwa Kwon, Sang Il Kwak, and Seungyoung Ahn, “Electromagnetic Shielding Analysis of Multiple Slits on a Metal Plate Coated with a Ferrite Sheet,” IEEE Transactions on Electromagnetic Compatibility, vol. 58, no. 5, pp. 1448-1455, Oct. 2016.
  67. Chiuk Song, Hongseok Kim, Daniel H. Jung, Jonghoon J. Kim, Sunkyu Kong, Jiseong Kim, Seungyoung Ahn, Jonghoon Kim, and Joungho Kim, “Low EMF and EMI Design of Tightly-coupled Handheld Resonant Magnetic Field (HH-RMF) Charger for Automotive Battery Charging,” IEEE Transactions on Electromagnetic Compatibility, vol. 58, no. 4, pp. 1194-1209, Aug. 2016.
  68. Kibeom Kim, Karam Hwang, and Seungyoung Ahn, “An Improved 100 GHz Equivalent Circuit Model of a Through Silicon Via with Substrate Current Loop,” IEEE Microwave and Wireless Components Letters, vol. 26, no. 6, pp. 425-427, Jun. 2016.
  69. Suna Choi, Seungkeun Park, and Seungyoung Ahn, “Impact of discovery reference signals in LTE small-cell eNB on audio devices,” Electronics Letters, vol. 52, no. 10, pp. 874-875, May 2016.
  70. Hongseok Kim, Chiuk Song, Daniel H. Jung, Dong-Hyun Kim, Jonghoon Kim, Seungyoung Ahn, and Joungho Kim, “Coil Design and Measurements of Automotive Magnetic Field Resonant Wireless Power Transfer System for High Efficiency and Low EMF/EMI,” IEEE Transactions on Microwave Theory and Techniques, vol. 64, no. 2, pp. 383-400, Feb. 2016.
  71. Yeonje Cho, Jonghoon J. Kim, Dong-Hyun Kim, Seongsoo Lee, Hongseok Kim, Chiuk Song, Sunkyu Kong, Hyoungjun Kim, Seungyoung Ahn, and Joungho Kim, “Thin PCB-Type Metamaterials for Improved Efficiency and Reduced EMF Leakage in Wireless Power Transfer Systems,” IEEE Transactions on Microwave Theory and Techniques, vol. 64, no. 2, pp. 353-364, Feb. 2016.
  72. Minho Kim, Hongseok Kim, Dongwook Kim, Yongmin Jeong, Hyun-Ho Park, Seungyoung Ahn, “A Three-Phase Wireless-Power-Transfer System for Online Electric Vehicles with Reduction of Leakage Magnetic Fields,” IEEE Transactions on Microwave Theory and Techniques, Vol. 63, No. 11, pp. 3806-3813, Nov. 2015.
  73. Hyun Ho Park, Jong Hwa Kwon, Sang Il Kwak, and Seungyoung Ahn, “Effect of Air-Gap Between a Ferrite Plate and Metal Strips on Magnetic Shielding,” IEEE Transactions on Magnetics, Vol. 51, No. 11, Nov. 2015.
  74. Dongwook Kim, Jaehyoung Park, Hyun Ho Park, and Seungyoung Ahn, “Generation of Magnetic Propulsion Force and Torque for Microrobot Using Wireless Power Transfer Coil,” IEEE Transactions on Magnetics, Vol. 51, No. 11, 8600104, Nov. 2015.
  75. Karam Hwang, Jaehyoung Park, Dongwook Kim, Hyun Ho Park, Jong Hwa Kwon, Sang Il Kwak, and Seungyoung Ahn, “Autonomous Steering using Coil Alignment System for Electric Vehicles with Dynamic Wireless Charging,” Mathematical Problems in Engineering, Vol. 2015, 205285, Sep. 2015.
  76. Hyun-Ho Park, Jong Hwa Kwon, Sang Il Kwak, and Seungyoung Ahn, “Magnetic Shielding Analysis of a Ferrite Plate with a Periodic Metal Strip,” IEEE Transactions on Magnetics, Vol. 51, No. 8, Article Number 7002408, Aug. 2015.
  77. Sukjin Kim, Daniel Hyunsuk Jung, Jonghoon J. Kim, Bumhee Bae, Sunkyu Kong, Seungyoung Ahn, Jonghoon Kim, Joungho Kim, “High-Efficiency PCB- and Package-Level Wireless Power Transfer Interconnection Scheme Using Magnetic Field Resonance Coupling,” IEEE Transactions on Components Packaging and Manufacturing Technology, Vol. 5, No. 7, pp. 863-878, Jul. 2015.
  78. Hyun-Ho Park, Jong Hwa Kwon, Sang Il Kwak, and Seungyoung Ahn, “Magnetic Shielding Analysis of a Multiply-Slotted Metal Plate Coated with a Ferrite Sheet in a Periodic Line Current Source,” Journal of Magnetism and Magnetic Materials, Vol. 385, pp. 250-256, Jul. 2015.
  79. Seung Beop Lee, Seungyoung Ahn, and In Gwun Jang, “Development of the Optimization Framework for Wireless Power Transfer Systems,” IEEE Transactions on Microwave Theory and Techniques, Vol. 63, No. 3, Apr. 2015.
  80. Hwansoo Moon, Sungkyu Kim, Hyun Ho Park, and Seungyoung Ahn, “Design of a Resonant Reactive Shield with Double Coils and a Phase Shifter for Wireless Charging of Electric Vehicles,” IEEE Transactions on Magnetics, vol. 51, no. 3, Apr. 2015
  81. Hyun-Ho Park, Jong Hwa Kwon, Sang Il Kwak, and Seungyoung Ahn, “Analysis of Quasistatic Magnetic Field Penetration into Multiple Slits in a Conducting Plane Loaded with a Ferrite Sheet,” IEEE Transactions on Electromagnetic Compatibility, vol. 57, no. 2, Apr. 2015.
  82. Joungho Kim and Seungyoung Ahn “Guest Editorial: Mini-special Issue on 2014 IEEE Wireless Power Transfer Conference (WPTC 2014),” IEEE Transactions on Microwave Theory and Techniques, vol. 63. No. 3. pp, 778-779, Mar. 2015.
  83. Dongwook Kim, Minho Kim, Jesung Yoo, Hyun-Ho Park, and Seungyoung Ahn, “Magnetic Resonant Wireless Power Transfer for Propulsion of Implantable Micro-robot,” Journal of Applied Physics, 117(17), 17E712, Jan. 2015.
  84. Tushar Batra, Erik Schaltz, and Seungyoung Ahn, “Effect of Ferrite Addition above the Base Ferrite on the Coupling Factor of Wireless Power Transfer for Vehicle Applications,” Journal of Applied Physics, 117(17), 17D517-1, Jan. 2015.
  85. Jingook Kim, Jongjoo Lee, Seungyoung Ahn, and Jun Fan, “Closed-Form Expressions for the Noise Voltage caused by a Burst Train of IC Switching Currents on a Power Distribution Network,” IEEE Transactions on Electromagnetic Compatibility, vol. 10, no. 4, pp. 1585-1597, Dec. 2014.
  86. Hyun Ho Park, Jong Hwa Kwon, and Seungyoung Ahn, “Magnetic Shielding Analysis of a Slit on a Conducting Plate Coated with a Ferrite Sheet: Transverse Incidence,” IEEE Transactions on Magnetics, Vol. 50, No. 9, 5000506, Sep. 2014.
  87. Seonghwan Kim, Hyun Ho Park, Jonghoon Kim, Jiseong Kim, and Seungyoung Ahn, “Design and Analysis of a Resonant Reactive Shield for a Wireless Power Electric Vehicle,” IEEE Transactions on Microwave Theory and Techniques, Vol. 62, No. 4, pp.1057-1066, Apr. 2014.
  88. Myunghoi Kim, Kyoungchoul Koo, Yujeong Shim, Chulsoon Hwang, Jun So Pak, Seungyoung Ahn, and Joungho Kim, “Vertical Stepped Impedance EBG (VSI-EBG) Structure for Wideband Suppression of Simultaneous Switching Noise in Multilayer PCBs” IEEE Transactions on Electromagnetic Compatibility, Vol. 55, No. 2, pp. 307-314, Apr. 2014.
  89. Jaegue Shin, Seungyong Shin, Yangsu Kim, Seungyoung Ahn, Seokhwan Lee, Guho Jung, Boyune Song, Seongjeub Jeon, and Dong Ho Cho, “Design and Implementation of Shaped Magnetic-Resonance-Based Wireless Power Transfer System for Roadway-Powered Moving Electric Vehicles,” IEEE Transactions on Industrial Electronics, Vol. 61, No. 3, pp. 1179-1192, Mar. 2014.
  90. Seungyoung Ahn, Chulsoon Hwang, and Hyun Ho Park, “Optimized Shield Design for Reduction of EMF from Wireless Power Transfer Systems” IEICE Electronics Express, Vol. 11, No. 2, pp. 1-9, Feb. 2014.
  91. Yangbae Chun, Seongwook Park, Jonghoon Kim, Jiseong Kim, Hongseok Kim, Joungho Kim, Nam Kim, and Seungyoung Ahn, “Electromagnetic Compatibility of Resonance Coupling Wireless Power Transfer in On-Line Electric Vehicle System, IEICE Transactions on Communications, Vol. E97-B, No. 2, pp. 416-423, Feb. 2014.
  92. Minchul Shin, Myunghoi Kim, Jiseong Kim, Joungho Kim, and Seungyoung Ahn, “Small-size, Low-cost, Wideband, Continuous-time Linear Passive Equalizer with an Embedded Cavity Structure on a High-Speed Digital Channel,” IEEE Transactions on Advanced Packaging, Vol. 4, No. 1, pp. 94-99, Jan. 2014.
  93. Jiseong Kim, Jonghoon Kim, Sunkyu Kong, Hongseok Kim, In-Soo Suh, Nam Pyo Suh, Dong-Ho Cho, Joungho Kim, and Seungyoung Ahn, “Coil Design and Shielding Methods for a Magnetic Resonant Wireless Power Transfer System,” Proceedings of the IEEE, Vol. 101, No. 6, pp. 1332-1342, Jun. 2013.
  94. Seungyoung Ahn, Nam Pyo Suh, and Dong-Ho Cho, “Charging Up the Road,” IEEE Spectrum, pp. 48-54, Apr. 2013.
  95. Yang-bae Chun, Ki-won Hwang, Nam Kim, and Seung-young Ahn, “Multi-Sectional Coil Design for Wireless Power Transfer,” International Journal of Advanced Railway, Vol. 1, No. 2, pp. 41-44, Oct. 2013.
  96. Kiwon Hwang, Seonghwan Kim, Seongkyu Kim, Yangbae Chun and Seungyoung Ahn, “Design of Wireless Power Transfer System for Railway Application,” International Journal of Railway, Vol. 5, No. 4, pp. 167-174, Dec. 2012.
  97. Seungyoung Ahn, Yangbae Chun, Dong-Ho Cho, and Joungho Kim, “Wireless Power Transfer Technology in On-Line Electric Vehicle,” Journal of Electromagnetic Engineering and Science, vol. 11, no. 3, pp. 174-182, Sep. 2011.
  98. Jonghoon Kim, Hongseok Kim, In-Myoung Kim, Young-Il Kim, Seungyoung Ahn, Jiseong Kim, and Joungho Kim, “Reduction of Electromagnetic Field from Wireless Power Transfer Using a Series-Parallel Resonance Circuit Topology,” Journal of Electromagnetic Engineering and Science, vol. 11, no. 3, pp. 166-173, Sep. 2011.
  99. Jeonghyeon Cho, Eakhwan Song, Heegon Kim, Seungyoung Ahn, Jun So Pak, Jiseong Kim, and Joungho Kim, “Mixed-mode ABCD Parameters: Theory and Application to Signal Integrity Analysis of PCB-level Differential Interconnects,” IEEE Transactions on Electromagnetic Compatibility, vol.53, no.3, pp. 814-822, Aug. 2011.
  100. Hyun Ho Park and Seungyoung Ahn, “Mitigation of noise coupling on RF cable using electromagnetic bandgap structures,” Electronics Letters, Vol. 47, No. 15, pp. 849-850, Jul. 2011.
  101. Jun So Pak, Joohee Kim, Jonghyun Cho, Kiyeong Kim, Taigon Song, Seungyoung Ahn, Junho Lee, Hyungdong Lee, Kunwoo Park, and Joungho Kim, “PDN Impedance Modeling and Analysis of 3D TSV IC by Using Proposed P/G TSV Array Model Based on Separated P/G TSV and Chip-PDN Models,” IEEE Transactions on CPMT, vol. 1 no. 2, pp. 208-219, Feb. 2011.
  102. Junho Lee, Seungyoung Ahn, Woon-Seong Kwon, Kyung-Wook Paik, and Joungho Kim, “Microwave Frequency Model of FPBGA Solder Ball Extracted from S-Parameter Measurement,” IEICE Transactions on Electronics, Vol. E87-C, No. 9, pp. 1621-1627, Sep. 2004.
  103. Seungyoung Ahn, Junho Lee, Junwoo Lee, Jonghoon Kim, Woonghwan Ryu, Young-Soo Kim, Byung-Hun Kum, Hyun-Seok Choi, Chong K. Yoon, and Joungho Kim, “Over GHz Electrical Circuit Model of a High-Density Multiple Line Grid Array (MLGA) Package”, IEEE Transactions On Advanced Packaging, Volume 26, Issue 1, pp. 90-98, Feb. 2003.
  104. Woonghwan Ryu, Myung-Jin Yim, Seungyoung Ahn, Junho Lee, Woopoung Kim, Kyung-Wook Paik, and Joungho Kim, “High-Frequency SPICE Model of Anisotropic Conductive Film Flip-Chip Interconnections Based on a Genetic Algorithm,” IEEE Transaction on Components and Packaging Technologies, Vol. 23, Issue.3, pp. 542-545, Sep. 2000.
  105. Woonghwan Ryu, Junwoo Lee, Hyungsoo Kim, Seungyoung Ahn, Namhoon Kim, Baekkyu Choi, Donggun Kam, and Joungho Kim, “RF Interconnect for Multi-Gbit/sec Board-Level Clocck Distribution,” IEEE Transactions on Advanced Packaging, Vol. 23, Issue. 3, pp. 398-407, Aug. 2000.
  106. Myung Jin Yim, Woonghwan Ryu, Young-Doo Jeon, Junho Lee, Seungyoung Ahn, Joungho Kim, and Kyung-Wook Paik, “Microwave Model of ACF Flip-Chip Interconnections for High-Frequency Application,” IEEE Transactions on CPT, Vol. 22, Issue 4, pp.575-581, Dec. 1999.

 

International Conferences Papers

  1. Haerim Kim, Jangyong Ahn, Jaewon Rhee, and Seungyoung Ahn, “Application of Wireless Power Transfer Technology to Implantable Medical Devices, IEEE International Microwave Biomedical Conference, Accepted, 2022.
  2. Semin Choi, Sungryul Huh, Seongho Woo, Haerim Kim, Jedok Kim, GuHo Jung, Khalifa Al Hosani, and Seungyoung Ahn, “\EMF Reduction Method Considering Efficiency Degradation using Two Reactive Shielding Coils in Multi-Transmitter Wireless Power Transfer System,” IEEE Wireless Power Transfer Conference, Accepted, 2022.
  3. Sanguk Lee, Seongho Woo, Hongseok Kim, Gagyeong Park, Yujun Shin, Seokhyeon Son, Seungyoung Ahn, “Double C-Shaped Reactive Shielding Coils for Low EMF and High Efficiency Wireless Power Transfer System,” IEEE Wireless Power Transfer Conference, Accepted, 2022.
  4. Sungryul Huh, Semin Choi, Dongryul Park, Haerim Kim, Yujun Shin, Jedok Kim, GuHo Jung, Khalifa Al Hosani, and Seungyoung Ahn, “Design to Minimize Coupling Coefficient between Transmitter Coils based on Deep Learning for Wireless Power Transfer with Multi-Transmitter,” IEEE Wireless Power Transfer Conference, Accepted, 2022.
  5. Yujun Shin, Seongho Woo, Changmin Lee, Jaewon Rhee, Sungryul Huh, and Seungyoung Ahn, “Determination of Current Ratio to Minimize Power Losses of Coils in Wireless Power Transfer System with Double-Sided LCC Topology,” IEEE Wireless Power Transfer Conference, Accepted, 2022.
  6. Bumjin Park, Sungryul Huh, Haerim Kim, Yujun Shin, Seongho Woo, Seungyoung Ahn, “Design and Analysis of Magnetic Energy Harvester with Improved Power Density for Drone Charging Station Near High Voltage Power Line,” International Conference on Electronics, Information, and Communication (ICEIC), 2022
  7. Chang-Yeob Chu, Sungryul Huh, Semin Choi, Jong-Hyeok Park, Seungyoung Ahn, Sang-Gug Lee, Ki-Bum Park, “Wireless Power Transfer System Design for Electric Vehicle Charging Considering A Wide Range of Coupling Coefficient Variation Depending on the Coil Misalignment,” 24th International Conference on Electrical Machines and Systems (ICEMS), 2021, pp. 732-737, doi: 10.23919/ICEMS52562.2021.9634575, 2021.
  8. Sungryul Huh, Semin Choi, Jongwook Kim, Bumjin Park, Yujun Shin and Seungyoung Ahn, “Adjustment of Transmitter Coil Current Ratio in Two Transmitter and Two Receiver Wireless Power Transfer System,” 24th International Conference on Electrical Machines and Systems (ICEMS), 2021, pp. 727-731, doi: 10.23919/ICEMS52562.2021.9634502, 2021.
  9. Semin Choi, Sungryul Huh, Sanguk Lee, Haerim Kim, Seongho Woo and Seungyoung Ahn, “Drone Wireless Charging Station using Multiple Transmitter Coils of Different Sizes with Degrees of Freedom in the Air gap,” 24th International Conference on Electrical Machines and Systems (ICEMS), 2021, pp. 722-726, doi: 10.23919/ICEMS52562.2021.9634472, 2021.
  10. Seunghun Ryu, Haerim Kim, Jangyong Ahn, Seungyoung Ahn and Jiseong Kim, “Contactless Interconnect Circuit Design for Automotive CAN Communication,” International Conference on Information and Communication Technology Convergence (ICTC), pp. 65-68, 2021.
  11. Hyunwoong Kim, Jongwook Kim, Kyunghwan Song, Seonghi Lee, Keunwoo Kim, Seongguk Kim, Daehwan Lho, Hyunsik Kim, Minho Park, Seungyoung Ahn, “Modeling and Signal Integrity Analysis of Mounting Pad with Layer-cutting to reduce Impedance Mismatch for Dual-In-Line Memory Module (DIMM),” IEEE Conference on Electrical Performance of Electronic Packaging and Systems (EPEPS), 2021.
  12. Seonghi Lee, Hyunwoong Kim, Kyunghwan Song, Jongwook Kim, Dongryul Park, Jangyong Ahn, Keunwoo Kim, Seungyoung Ahn, “Deep Reinforcement Learning-based Power Distribution Network Structure Design Optimization Method for High Bandwidth Memory Interposer,” IEEE Conference on Electrical Performance of Electronic Packaging and Systems (EPEPS), 2021.
  13. Dawon Jeong, Jongwook Kim, Haerim Kim, Dongwook Kim, Jaehyoung Park, Seongho Woo, Sungmin Park, and Seungyoung Ahn, “Methodology for Reduction of Noise Interference in Wireless Charging Implantable ECG Sensor,” International Symposium on Electromagnetic Compatibility, Jul. 2021.
  14. Sungryul Huh, Jaehyoung Park, Seonghun Lee, Kyunghwan Kim, Seongho Woo, Changmin Lee, Jaewon Rhee, Seokhyeon Son, and Seungyoung Ahn, “Design of Reactive Shield Coil for Wireless Charger with Multiple Coils,” IEEE Wireless Power Transfer Conference (WPTC), Jun. 2021.
  15. Seokhyeon Son, Seonghi Lee, Jaewon Rhee, Yujun Shin, Seongho Woo, Sungryul Huh, Changmin Lee, and Seungyoung Ahn, “Foreign Object Detection of Wireless Power Transfer System Using Sensor Coil,” IEEE Wireless Power Transfer Conference (WPTC), Jun. 2021.
  16. Jaewon Rhee, Yujun Shin, Haerim Kim, Jongwook Kim, Changmin Lee, Sungryul Huh, Seongho Woo, Seokhyeon Son and Seungyoung Ahn, “Wireless Torque Transfer using Rotating Magnetic Field with Multiple Coils,” IEEE Wireless Power Transfer Conference (WPTC), Jun. 2021.
  17. Changmin Lee, Seongho Woo, Yujun Shin, Jaewon Rhee, Sungryul Huh, Seokhyeon Son, Jungick Moon, and Seongyoung Ahn, “EMI Reduction Method in Wireless Power Transfer System with Increasing Efficiency using Frequency Split Phenomena,” IEEE Wireless Power Transfer Conference (WPTC), Jun. 2021.
  18. Seongho Woo, Yujun Shin, Changmin Lee, Sungryul Huh, Jaewon Rhee, Bumjin Park, Seokhyeon Son, and Seungyoung Ahn, “EMI Reduction Method for Over-Coupled WPT System using Series-None Topology,” IEEE Wireless Power Transfer Conference (WPTC), Jun. 2021.
  19. Jaehyoung Park, Yujun Shin, Chanjun Park, Bumjin Park, Seongho Woo, Sungryul Huh, Haerim Kim, and Seungyoung Ahn, “Dual Resonant Reactive Shield for Reducing the Electromagnetic Fields from Wireless Charging Electric Vehicle,” EMC Europe, September 2020.
  20. Yujun Shin, Haerim Kim, Jaehyoung Park, Bumjin Park, Seongho Woo, Sungryul Huh, Chanjun Park, and Seungyoung Ahn, “A LCL-LCL Topology for Odd Harmonic Magnetic Fields Reduction in Over-Coupled WPT System,” EMC Europe, September 2020.
  21. Hyunwoong Kim, Kibeom Kim, Kyunghwan Song, Yoon-Mi Park, Seung-Kab Ryu and Seungyoung Ahn, “Proposal of Electromagnetic Pulse (EMP) Coupling Estimation Method to Power System including Load condition and Surge Protection Device (SPD),” IEEE EMC + SIPI, August 2020.
  22. Jongwook Kim, Haerim Kim, Dongwook Kim, Jaehyung Park, Bumjin Park, Sungryul Huh, and Seungyoung Ahn, “Analysis of Eddy Current Loss for Wireless Power Transfer in Conductive Medium High Using Z-parameters Method,” Wireless Power Transfer Conference, Seoul, Korea, May 2020.
  23. Bumjin Park, Sungryul Huh, Dongwook Kim, Andres Santiago Brito Calderon, Yujun Shin, Jaehyoung Park, Jay Koo, and Seungyoung Ahn, “Analysis of Magnetic Energy Harvester for Inspection Robot of Power Line Using Saturable Inductor,” Wireless Power Transfer Conference, Seoul, Korea, May 2020.
  24. Haerim Kim, Jongwook Kim, Yujun Shin, Jangyong Ahn, Dongwook Kim, Jaehyoung Park, Bumjin Park, Sungryul Huh, and Seungyoung Ahn, “Mitigation of Frequency Splitting Phenomena Using a Matching Capacitor in Wireless Power Transfer System for Automated Guided Vehicle,” Wireless Power Transfer Conference, Seoul, Korea, May 2020.
  25. Sungryul Huh, Bumjin Park, Dongwook Kim, Jongwook Kim, Jaehyoung Park, Haerim Kim, Yujun Shin, and Seungyoung Ahn, “Optimal Transmitter Selection Method for Maximum Power Efficiency for Wireless Power Transfer System Using Multi-Transmitter,” Wireless Power Transfer Conference, Seoul, Korea, May 2020.
  26. Junsung Choi, Chungjae Choe, Dongryul Park, Jangyong Ahn, Yujun Shin, and Seungyoung Ahn, “Practical LPI Communication with Noise-Shaped Signaling”, International Conference on ICT Convergence (ICTC), Jeju, Korea, Oct. 2019.
  27. Hyunwoong Kim, Kibeom Kim, Bumjin Park, Jaehyoung Park, Yoon-Mi Park, Seung-Kab Ryu, and Seungyoung Ahn, “Coupling Model of Electromagnetic Pulse to Cable based on System Identification,” IEEE International Symposium on Electromagnetic Compatibility, Signal & Power Integrity (EMC+SIPI), Jul. 2019.
  28. Jaehyoung Park, Yujun Shin, Jongwook Kim, Bumjin Park, Hyunwoong Kim, and Seungyoung Ahn, “Frequency Selection Method for Wireless Power Transfer System Considering Electromagnetic Interference Reduction,” IEEE International Symposium on Electromagnetic Compatibility, Signal & Power Integrity (EMC+SIPI), Jul. 2019.
  29. Jangyong Ahn, Seon-eui Hong, Haerim Kim, Hyung-Do Choi, and Seungyoung Ahn, “Comparison of human body models for electromagnetic field exposure in a low-frequency band,” BioEM, 2019.
  30. Dongwook Kim, Jongwook Kim, Haerim Kim, “Effect of Biological Properties on Parasitic Capacitance Variation of Wireless Power Transfer Coil,” PIERS 2019, 2019.
  31. Yujun Shin, Jaehyoung Park, Haerim Kim, Bumjin Park, Jongwook Kim, Chanjun Park, and Seungyoung Ahn, “A Wireless Charging Coil in Printed Circuit Board with Partially Split Conductors for Low Resistance,” IEEE Wireless Power Transfer Conference, 2019.
  32. Chanjun Park, Jaehyoung Park, Yujun Shin, Sungryul Huh, Jongwook Kim, and Seungyoung Ahn, “Separated Circular Capacitive Couplers for Rotational Misalignment of Drones,” IEEE Wireless Power Transfer Conference, 2019.
  33. Jongwook Kim, Haerim Kim, Dongwook Kim, Yujun Shin, Chanjun Park, and Seungyoung Ahn “Modeling of Magnetic Coupled Coil for Wireless Power Transfer in Conductive Medium,” IEEE Wireless Power Transfer Conference, 2019.
  34. Dongwook Kim, Beomjin Park, Jaehyoung Park, Yujun Shin, Hyun-Ho Park, and Seungyoung Ahn, “Actuator-less implantable microrobot propulsion using ferromagnetic material based on wireless power transfer system,” IEEE Conference on Electromagnetic Field Computation, Accepted, Hangzhou, China, Oct. 2018.
  35. Jaehyoung Park, Yujun Shin, Dongwook, Bumjin Park, and Seungyoung Ahn, “Planar Resonance Reactive Shield for Reducing the EMI in Portable WPT Device Application,” IEEE Symposium on Electromagnetic Compatibility, Signal and Power Integrity, Long Beach, USA, Aug. 2018.
  36. Yujun Shin, Jaehyoung Park, Jonghoon Kim, Byunggi Kwon, Heehyun Eun, and Seungyoung Ahn, “Wireless Power Transfer System for Unmanned Vehicle using T-shape Ferrite Structure,” Asia-Pacific Symposium on Electromagnetic Compatibility, Singapore, May 2018.
  37. Bumjin Park, Dongwook Kim, Jaehyoung Park, Yujun Shin, Jay Koo, and Seungyoung Ahn, “Design of Toroidal Core for Magnetic Energy Harvester Near Power Line Considering Saturation” Asia-Pacific Symposium on Electromagnetic Compatibility, Singapore, May 2018.
  38. Kibeom Kim, Bumjin Park, Jedok Kim, Jay Koo, and Seungyoung Ahn, “Analytic Computation of Power-Line Voltage Drop Produced by Magnetic Energy Harvesting Device,” Intermag, Singapore, Apr. 2018.
  39. Jedok Kim, Kibeom Kim, and Seungyoung Ahn, “An Electromagnetic Feld Reduction Method for Inductive Power Transfer in Transportation System,” Intermag, Singapore, Apr. 2018.
  40. Youngwoo Kim, Kyungjun Cho, Gapyeoal Park, Shinyoung Park, Seungyoung Ahn, and Joungho Kim, “Electrical Performance Analysis of Low-cost and Ultra-thin Glass Interposer: Advantages, Challenges and Solutions,” DesignCon, Santa Clara, USA, Jan. 2018.
  41. Bunjin Park, Dongwook Kim, Jaehyoung Park, Jay Koo, Hyunho Park, Seungyoung Ahn, “Design methodology of toroidal core for magnetic energy harvesting based on magnetic field dependence of permeability near power line,” Magnetism and Magnetic Material, Pittsburgh, USA, Nov. 2017.
  42. Dongwook Kim, Bumjin Park, Jaehyoung Park, Hyunho Park, Seungyoung Ahn, “Magnetic field concentration using ferromagnetic material for propulsion of wireless power transfer based micro-robot,” Magnetism and Magnetic Material, Pittsburgh, USA, Nov. 2017.
  43. Jaehyung Park, Seungyoung Ahn, “Reduction of Electromagnetic Interference for Wireless Power Transfer Coils in Mobile Devices,” Asia-Pacific International Symposium on Electromagnetic Compatibility, Seoul, Korea, Jun. 2017.
  44. Dongwook Kim, Seungyoung Ahn, “Constant Velocity Motion of a Micro-Robot Using a Uniform Magnetic Field,” Asia-Pacific International Symposium on Electromagnetic Compatibility, Seoul, Korea, Jun. 2017.
  45. Hongkyun kim, Karam Hwang, Jaehyung Park, Dongwook Kim, and Seungyoung Ahn, “Design of Single-Sided AC Magnetic field forming coil for Wireless Power Transfer”, IEEE Wireless Power Transfer Conference, Taipei, Taiwan, May 2017.
  46. Junggun Byun, Cheolseung Choi, Seungyoung Ahn, Karam Hwang, Jangyong Ahn, Junho Gohng, Chunsoo Kim, Jaehyung Park, Woonghwan Ryu, Jaesung Park, Dongcheol Jo, Junhyuk Choi, “Optimization and Analysis of Surge Noise Impact on Power Window Control System in Automotive,” DesignCon 2017, Santa Clara, USA, Jan, 2017.
  47. Dongwook Kim, Karam Hwang, Jaehyoung Park, Hyun Ho Park, and Seungyoung Ahn, “High Efficiency Wireless Power and Force Transfer for Micro-robot using 3-Axis AC/DC Magnetic Coil,” The 17th Biennial Conference on Electromagnetic Field Computation, Miami, USA, Nov. 2016.
  48. Kibeom Kim, Jonghoon Kim, Hongkyun Kim, Jangyong Ahn, Hyun Ho Park, and Seungyoung Ahn, “Evaluation of Electromagnetic Field Radiation from Wireless Power Transfer Electric Vehicle,” International Symposium on Antennas and Propagation, Okinawa, Japan, Oct. 2016.
  49. Dongwook Kim, Karam Hwang, Jaehyoung Park, HyunHo Park, and Seungyoung Ahn, “Miniaturization of Implantable Micro-Robot Propulsion using Wireless Power Transfer System,” The 4th International Conference of Asian Union of Magnetics Societies, Taiwan, Aug. 2016.
  50. Dongwook Kim, Jaehyoung Park, Karam Hwang, and Seungyoung Ahn, “Generating Propulsion Force in Micro-robot using Wireless Power Transfer System,” Asia-Pacific Radio Science Conference, Seoul, Korea, Aug. 2016.
  51. Jaehyoung Park, Jedok Kim, and Seungyoung Ahn, “Electromagnetic Compatibility in Wireless Power Transfer System,” Asia-Pacific Radio Science Conference, Seoul, Korea, Aug. 2016.
  52. Jaehyoung Park, Hyun Ho Park, and Seungyoung Ahn, “Reduction of Leakage Magnetic Field for Wireless Power Transfer Coils in Laptop,” Asia-Pacific Electromagnetic Compatibility Symposium, Shenzhen, China, May 2016.
  53. Kibeom Kim, Hyun Ho Park, and Seungyoung Ahn, “Wideband Equivalent Circuit Model of Through-Silicon-Via with MOS Capacitance Effect,” Asia-Pacific Electromagnetic Compatibility Symposium, Shenzhen, China, May 2016.
  54. Je-Dok Kim, Hyun Ho Park, Seungyoung Ahn, “Electromagnetic Field Reduction in Railway Wireless Power Transfer System,” Asia-Pacific Electromagnetic Compatibility Symposium, Shenzhen, China, May 2016.
  55. Jaehyoung Park, Karam Hwang, Dongwook Kim, and Seungyoung Ahn,Lateral Misalignment Tolerance Enhancement by using Electromagnet Based Flux Gate in Wireless Power Transfer Systems,” IEEE Wireless Power Transfer Conference, Aveiro, Portugal, May 2016.
  56. Kibeom Kim, Karam Hwang, and Seungyoung Ahn,Wideband Equivalent Circuit Model for a Through Silicon Via with Effective Substrate Current Loop,” IEEE Electrical Design of Advanced Packaging System, Seoul, Korea, Dec. 2015.
  57. Jedok Kim and Seungyoung Ahn, “Electromagnetic Field Reduction in Railway Wireless Power Transfer System,” Korea-Japan EMT/EMC/BE Joint Conference, Sendai, Japan, Nov. 2015.
  58. Jaehyoung Park and Seungyoung Ahn, “Reactive Shield for Vehicular Wireless Power Transfer System,” Korea-Japan EMT/EMC/BE Joint Conference, Sendai, Japan, Nov. 2015.
  59. Dongwook Kim, Karam Hwang, Seungyoung Ahn, and Ilsong Han, “Driver Status Monitoring Based on Neuromorphic Visual Processing,” World Scientific and Engineering Academy and Society, Seoul, Korea, Sep. 2015.
  60. Dongwook Kim, Jaehyoung Park, Hyun Ho Park, and Seungyoung Ahn, “Propulsion and Control of Implantable Micro-Robot based on Wireless Power Transfer,” IEEE Wireless Power Transfer Conference, Boulder, USA, May 2015.
  61. Dongwook Kim, Jaehyoung Park, Hyun Ho Park, and Seungyoung Ahn, “Generation of Magnetic Propulsion Force using Wireless Power Transfer Coil,” IEEE International Magnetics Conference, Beijing, China, May 2015.
  62. Dongwook Kim, Minho Kim, Jesung Yoo, Hyun Ho, Park, and Seungyoung Ahn, “Magnetic Resonant Wireless Power Transfer for Propulsion of Implantable Micro-Robot,” 59th Annual Magnetism and Magnetic Material Conference, pp. 724-725, Honolulu, USA, Nov. 2014.
  63. Hyun-Ho Park, Jong hwa Kwon, Sang Il Kwak, and Seungyoung Ahn, “Effect of Periodic Metal Flakes on Magnetic Shielding of a Ferrite Plate,” 59th Annual Magnetism and Magnetic Material Conference, p. 79, Honolulu, USA, Nov. 2014.
  64. Tushar Batra, Eric Schaltz, and Seungyoung Ahn, “Effect of ferrite addition parallel to the coils on coupling factor of wireless power transfer to Vehicles,” 59th Annual Magnetism and Magnetic Material Conference, p. 652, Honolulu, USA, Nov. 2014.
  65. Tushar Batra, Eric Schaltz, and Seungyoung Ahn, “Reduction of magnetic emission by increasing secondary side capacitor for ferrite geometry based series-series topology for wireless power transfer to vehicles”, Proceedings of 16th European Conference on Power Electronics and Applications (EPE’14-ECCE Europe), pp 1-11, Finland, Aug. 2014.
  66. Minho Kim, Sunghwan Kim, Yangbae Chun, Seongwook Park, and Seungyoung Ahn, “Low Frequency Electromagnetic Compatibility of Wirelessly Powered Electric Vehicles,” EMC Tokyo ‘14, pp. 426-429, Japan, May 2014.
  67. Hwansoo Moon, Seonghwan Kim, Hyun Ho Park, and Seungyoung Ahn, “Design of a Resonant Reactive Shield with Modified Phase Shifter,” IEEE Conference on Electromagnetic Field Computation, PF2-13, France, May 2014.
  68. Hwansoo Moon, Yangbae Chun, and Seungyoung Ahn, “Design of a Novel Resonant Reactive Shield for Wireless Charging System in Electric Vehicle,” IEEE Wireless Power Transfer Conference, pp. 220-223, Korea, May 2014.
  69. Minho Kim, Hongseok Kim, and Seungyoung Ahn, “Magnetic Design of a Three-Phase Wireless Power Transfer System for EMF Reduction,” IEEE Wireless Power Transfer Conference, pp. 17-20, Korea, May 2014.
  70. Jaehyoung Park, and Seungyoung Ahn, “A Novel Shielding Coil for Electromagnetic Field(EMF) Reduction of Wireless Power Transfer in Laptop Computer,” IEEE Wireless Power Transfer Conference, pp. 235-238, Korea, May 2014.
  71. Seung Beop Lee, Seungyoung Ahn, and In Gwun Jang, “Development of the optimization framework for wireless power transfer systems,” IEEE Wireless Power Transfer Conference, pp. 88-91, Korea, May 2014.
  72. Seung Beop Lee, Seungyoung Ahn, Junho Lee, and In Gwun Jang, “Optimization of the wireless power transfer system in an electric railway,” IEEE Wireless Power Transfer Conference, pp. 158-161, Korea, May 2014.
  73. Sangyeong Jeong, Seungyoung Ahn, and Jingook Kim, “Spatial Visualization of Inductive Coupling Parameter for Optimization of Wireless Power Transfer Coils,” IEEE Wireless Power Transfer Conference, pp. 126-129, Korea, May 2014. 
  74. Seungyoung Ahn and Dong-Ho Cho, “Future Wireless Power Transportation System,” Asia-Pacific Microwave Conference, pp. 468-469, Korea, Nov. 2013.
  75. Kiwon Hwang, Sanghoon Chung, Uooyeol Yoon, Manho Lee and Seungyoung Ahn, “Thermal Analysis for Temperature Robust Wireless Power Transfer Systems,” IEEE MTT-S Wireless Power Transfer Conference, pp. 52-55, Italy, May 2013.
  76. Seonghwan Kim, Kiwon Hwang, Sungkyu Kim, Seungyoung Ahn, “Electromagnetic Field Reduction using a Reactive Magnetic Shield for Wireless Power Transfer Systems,” Asia-Pacific Radio Science Conference, p. 290473, Taiwan, Sep. 2013.
  77. Sungkyu Kim, Hongseok Kim, Kiwon Hwang, Seonghwan Kim, Seungyoung Ahn, “Design of Wireless Power Transfer for Public Electric Bicycle,” Asia-Pacific Radio Science Conference, p. 290634, Taiwan, Sep. 2013.
  78. Yangbae Chun, Seongwook Park, Jonghoon Kim, Jisong Kim, Hongseok Kim, Joungho Kim, Nam Kim, and Seungyoung Ahn, “Low Frequency Electromagnetic Interference Measurement for Electric Vehicles with Wireless Power Transfer System,” Asia-Pacific Radio Science Conference, p. 290687, Taiwan, Sep. 2013.
  79. Seung Beop Lee, Seungyoung Ahn, and In Gwun Jang, “Development of an Optimization Algorithm of the Wireless Power Transfer,” Asia-Pacific Radio Science Conference, p. 290505, Taiwan, Sep. 2013.
  80. Yangbae Chun, Kiwon Hwang, Nam Kim, and Seungyoung Ahn, “Multi-Sectional Coil Design for Wireless Power Transfer in High-Speed Railway System Application,” The International Symposium on Speed-up, Safety and Service Technology for Railway and MAGLEV Systems (STECH ’12), pp. 1-6, Korea, 2012.
  81. Kiwon Hwang, Seungbeop Lee and Seungyoung Ahn, “Analysis of Magnetic Field from an Inductive Power Transfer System for Trains upon Location Change of Pickup Modules,” The International Symposium on Speed-up, Safety and Service Technology for Railway and MAGLEV Systems (STECH ’12), pp. 1-8, Korea, 2012.
  82. Hongseok Kim, Jonghyun Cho, Seungyoung Ahn, Jonghoon Kim, and Joungho Kim, “Suppression of Leakage Magnetic Field from a Wireless Power Transfer System using Ferrimagnetic Material and Metallic Shielding,” IEEE Electromagnetic Compatibility Symposium, USA, Aug. 2012.
  83. Yangbae Chun, Seongwook Park, Jiseong Kim, Hongseok Kim, Kiwon Hwang, Joungho Kim, and Seungyoung Ahn, “System and Electromagnetic Compatibility of Resonance Coupling Wireless Power Transfer in On-Line Electric Vehicle,” International Symposium on Antennas and Propagation, pp. 158-161, Japan, Oct. 2012.
  84. Seungyoung Ahn, Hyun Ho Park, Cheol-Seung Choi, Jonghoon Kim, Eakhwan Song, Hark Byung park, Hongseok Kim, and Joungho Kim, “Reduction of Electromagnetic Field (EMF) of Wireless Power Transfer System using Quadruple Coil for Laptop Applications,” IEEE MTT-S International Microwave Workshop Series on Innovative Wireless Power Transmission, Japan, pp. 65-68, May 2012.
  85. Hongseok Kim, Chul-Seung Choi, Jonghoon Kim, Yangbae Chun, Joungho Kim, and Seungyoung Ahn, “Design Considerations of Electromagnetic Field from Wireless Power Transfer System for Portable Electronic Devices,” Korea-Japan EMT/EMC/BE Joint Conference, pp. 1-4, Korea, May 2012.
  86. Jonghoon Kim, Hongseok Kim, Mijoo Kim, Seungyoung Ahn, Jiseong Kim, and Joungho Kim, “Analysis of EMF Noise from the Receiving Coil Topologies for Wireless Power Transfer,” Asia-Pacific International Symposium on Electromagnetic Compatibility, pp. 645-648, Singapore, May 2012
  87. Seungyoung Ahn, Ju Yong Lee, Dong-Ho Cho, and Joungho Kim, “Optimal Electromagnetic Field Design of Wireless Power Transfer System in On-Line Electric Vehicle,” International Symposium on Antennas and Propagation, FrA2-2, Korea, Oct. 2011.
  88. Jonghoon Kim, Hongseok Kim, Seungyoung Ahn, Jiseong Kim, In-Myoung Kim, Young-il Kim, and Joungho Kim, “Spread Spectrum Technology to Reduce the EMI from the Constant Voltage Source Type Wireless Power Transfer System,” International Symposium on Antennas and Propagation, WeB2-2, Korea, Oct. 2011.
  89. Seungyoung Ahn, Ju Yong Lee, Dong-Ho Cho, and Joungho Kim, “Optimal Design of Magnetic Field in On-Line Electric Vehicle,” Society for Design and Process Science, pp. 1-4, Korea, Jun. 2011.
  90. Seungyoung Ahn and Joungho Kim, “Magnetic Field Design for High Efficient and Low EMF Wireless Power Transfer in On-Line Electric Vehicle,” European Conference on Antennas and Propagation, Italy, pp. 4148-4151, Apr. 2011.
  91. Sunkyu Kong, Myunghoi Kim, Kyoungchoul Koo, Seungyoung Ahn, Bumhee Bae, and Joungho Kim, “Analytical Expressions for Maximum Transferred Power in Wireless Power Transfer Systems,” IEEE Electromagnetic Compatibility Symposium, pp. 379-383, USA, Aug. 2011.
  92. Seungyoung Ahn, Heejae Lee, Jung-Gun Byun, Jungyu Yang, Young-Choul Lim and Hongsik Keum, and Jae Man Song, and Joungho Kim, “Standard Electromagnetic Interference (EMI) Measurement for Hybrid and Electrical Vehicles,” Korea, Asian Pacific Electromagnetic Compatibility, May 2011.
  93. Seungyoung Ahn, Ju Yong Lee, Dong-Ho Cho, and Joungho Kim, “Magnetic Field Design for Low EMF and High Efficiency Wireless Power Transfer System in On-Line Electric Vehicle,” Korea, CIRP Design Conference, pp. 233-239, Mar. 2011.
  94. Seungyoung Ahn, Junso Pak, Taigon Song, Heejae Lee, Junggun Byun, Deogsoo Kang, Cheol-Seung Choi, Yangbae Chun, Chun taek Rim, Jae-Ha Yim, Dong-Ho Cho, and Joungho Kim, “Low Frequency Electromagnetic Field Reduction Techniques for the On-Line Electric Vehicle (OLEV),” IEEE Electromagnetic Compatibility Symposium, pp. 625-630, USA, Jul. 2010.
  95. Seungyoung Ahn, Taigon Song, Heejae Lee, Junggun Byun, Deogsoo Kang, Yangbae Chun, Jae-Ha Yim, Junso Pak, Chun taek Rim, Dong-Ho Cho, and Joungho Kim, “Active Shield to Minimize Magnetic Flux Density for On-Line Electric Vehicle (OLEV) Application,” Electromagnetic Compatibility Europe Conference, Poland, pp. 269-272, Sep. 2010.
  96. Taigon Song, Seungyoung Ahn, Heejae Lee, Junggun Byun, Dong-Ho Cho, and Joungho Kim, “An Analog Swithcing (Non PWM) High Power Inverter for EMI Suppression in ON-Line Electric Vehicle (OLEV),” Electromagnetic Compatibility Europe, pp. 832-835, Poland, Sep. 2010.
  97. Seungyoung Ahn, Junso Pak, Taigon Song, Heejae Lee, Junggun Byun, Deogsoo Kang, Cheol-Seung Choi, Eunjung Kim, Jiyun Ryu, Mijoo Kim, Yangbae Chun, Jae-Ha Yim, Dong-Ho Cho, and Joungho Kim, “VLF Electromagnetic Field Design for On-Line Electric Vehicle” Asian-Pacific Radio Science Conference, pp. E2-6, Japan, Sep. 2010.
  98. Seungyoung Ahn, Heejae Lee, Junggun Byun, Deogsoo Kang, Taigon Song, Yangbae Chun, Jae-Ha Yim, Dong-Ho Cho, and Joungho Kim, “Design of Electromagnetic Field (EMF) for a Novel On-Line Electric Vehicle (OLEV),” The Bioelectromagnetics Society 32nd Annual Meeting, Seoul, Korea, June 14-18, 2010.
  99. Hee-Jung Kim, Hyun Kim, Seungyoung Ahn, Il-Young Oh, Jong-Gwan Yook, “Reduction of Radiated Electromagnetic Interference in 4-Phases Pulse Width Modulation Converter System,” EDAPS, Korea, Dec. 2008.
  100. Seungyoung Ahn, Jongtae Chun, and Joungho Kim, “Implementation of On-Chip and On-Package Reactive Equalizer to Minimize Inter-Symbol Interference (ISI) and Jitter from Frequency Dependent Attenuation,” IEEE International Symposium on Electromagnetic Compatibility, pp. 1-6, USA, Jul. 2007.
  101. JB Lee, Seungyoung Ahn, Seungjoon Yoon, and Jongtae Chun, “Optimal Low Power Design of DDR2 Memory Interface for Compact Ultra Mobile Personal Computer (UMPC) Applications,” 2007 Electronic Packaging Technology Conference (EPTC), Singapore, Dec 2007.
  102. Seungyoung Ahn and Joungho Kim, “ESD and Input Capacitance Compensation Circuit using On-chip Embedded Inductor for 3 Gbps Applications,” Proceedings of IEEE International SoC Design Conference, Seoul, Korea, pp. 652-653, Oct. 25-26, 2004.
  103. Seungyong Baek, Seungyoung Ahn, Jongbae Park, Jonghoon Kim, Jeong-hyeon Cho, and Joungho Kim, “Accurate High Frequency Lossy Model of Differential Signal Line Including Mode-conversion and Common-mode Propagation Effect” Proceedings of IEEE International Symposium on Electromagnetic Compatibility, Santa Clara, California, USA, 2004
  104. Seungyoung Ahn, Jongbae Park, Daehyun Chung, and Joungho Kim, “Compensation of ESD and Input Capacitance Effect by Using Package Bondwire Inductance for Over Gbps Differential SerDes Devices,” Proceedings of IEEE 12th Topical Meeting on Electrical Performance of Electronic Packaging, pp. 159-162, Princeton, New Jersey, USA, Oct. 2003. 
  105. Seungyoung Ahn, Taehong Kim, and Joungho Kim, “10 GHz Differential Line Modeling of Leadframe-type TQFP Package for High-Speed Serial Interconnection Systems,” Proc. of IEEE 7th Workshop on Signal Propagation on Interconnects, Siena, Italy, 2003. 
  106. Seungyoung Ahn, Albert Chee W. Lu, Wei Fan, Lai L. Wai, and Joungho Kim, “Effects of Process Variation on Signal Integrity for High Speed Differential Signaling on Package Level,” Proc. of IEEE 4th Electronics Packaging Technology Conference, pp. 249-252, USA, Dec. 2002. 
  107. Seungyoung Ahn, Jonghoon Kim, Heeseok Lee, Jung-Gun Byun, Cheol-Seung Choi, Hae-Jin Hwang, and Joungho Kim, “Experimental Investigation of Radiated Emission from Flexible Printed Circuit (FPC) Cable,” Proc. of IEEE International Symposium on Electromagnetic Compatibility, pp. 883-888, USA, Jul. 2002. 
  108. Dong Gun Kam, Seungyong Baek, Myunghee Sung, Seungyoung Ahn, Bongcheol Park, and Joungho Kim, “A Novel Twisted Differential Line for High-speed On-chip Interconnections with Reduced Crosstalk,” 4th Electronic Packaging Technology Conference (EPTC), Singapore, Dec. 2002.
  109. Seungyoung Ahn, Albert Chee W. Lu, Wei Fan, Lai L. Wai, and Joungho Kim, “Solution Space Analysis of Interconnects for Low Voltage Differential Signaling (LVDS) Applications”, EPEP 2001, Boston, MA, USA, Oct. 2001. 
  110. Albert Chee W. Lu, Seungyoung Ahn, Wei Fan, Lai L. Wai, “Performance Analysis of Broadband Interconnects”, APACK 2001, Singapore, Dec. 2001. 
  111. Joungho Kim, Seungyoung Ahn, Bongchul park, Youchul Jeong, “An Undergraduate Class for High-frequency Design, Fabrication, and Measurement,” InterPACK2001, Kaui, Hawaii, Jul. 8-13, 2001. 
  112. Lai L. Wai, Albert Chee W. Lu, Seungyoung Ahn, Wei Fan, “Analysis of Frequency Dependent Characteristics In Board Level Broadband Interconnects”, APACK 2001, Singapore, Dec. 2001. 
  113. Junwoo Lee, Baekkyu Choi, Seungyoung Ahn, Woonghwan Ryu, Jae Myun Kim, Kwang Seong Choi, Joon-Ki Hong, Heung-Sup Chun and Joungho Kim, “Microwave Frequency Model of Wafer Level Package and Increased Loading Effect on Rambus Memory Module”, IEEE ECTC, Orlando, FL, USA, May 2001. 
  114. Heeseok Lee, Jonghoon Kim, Seungyoung Ahn, Jung-Gun Byun, Deog-soo Kang, Cheol-seung Choi, Hae-Jin Hwang, and Joungho Kim, “Effect of Ground Guard Fence with Via and Ground Slot on Radiated Emission in Multi-Layer Digital Printed Circuit Board,” 2001 IEEE International Symposium on Electromagnetic Compatibility, Montreal, Canada, August 13-16 2001.
  115. Young Soo Kim, Hyung Seok choi, Youngwoo Ko, Hyo jae Bang, Woo Kyung Kim, Junho Lee, Seungyong Baek, Junwoo Lee, Seungyoung Ahn, and Joungho Kim, “A MLGA Connector for High speed and High Density,” The International Conference and Exhibition on High Density Interconnect and Systems packaging, Santa Clara, California, Apr.18-20, 2001. 
  116. Seungyoung Ahn, Joon-woo Lee, Jonghoon Kim, Woonghwan Ryu, Young-Soo Kim, Chong K. Yoon, and Joungho Kim “High-Frequency Electrical Performance of a New High-Density Multiple Line Grid Array (MLGA) Package”, IEEE ECTC, Las Vegas, USA, May 2000. 
  117. Seungyoung Ahn, Woonghwan Ryu, Myung-Jin Yim, Junho Lee, Young-Doo Jeon, Woopoung Kim, Kyung-Wook Paik, and Joungho Kim, “Comparison of Ni-filled Balls and Au-coated Polymer Balls in High Frequency Application of Flip-chip Joint”, Symposium on Advances in Packaging, pp. 353-357, Dec. 1999. 
  118. Seungyoung Ahn, Woonghwan Ryu, Myung-Jin Yim, Junho Lee, Young-Doo Jeon, Woopoung Kim, Kyung-Wook Paik, and Joungho Kim “Over 10 GHz Equivalent Circuit Model of ACF Flip-Chip Interconnect using Ni-filled Balls and Au-coated Polymer Balls”, Electronics Manufacturing Technology Symposium. Twenty-Fourth IEEE/CPMT, pp. 421-425, Oct. 1999. 
  119. Junho Lee, Seungyoung Ahn, Jaeyoung Ryu, and Joungho Kim, “Over 20 GHz Microwave Frequency Model of Fine Pitch Ball Grid Array (FPBGA) Bonding”, EPEP 2000, Arizona, USA, Oct. 23-25, 2000. 
  120. Junho Lee, Seungyoung Ahn, Seungyong Baek, Young-Soo Kim, Chong K. Yoon, Joungho Kim, “Design and Estimation of Embedded Passives in Multiple Line Grid Array (MLGA) Package”, EMAP, Hong Kong, Nov. 30 – Dec. 2, 2000. 
  121. Joungho Kim, Seungyoung Ahn, Joon-Woo Lee, Jonghoon Kim, Woonghwan Ryu, Young-Soo Kim, Hyun Seok Choi, Byung Hun Kum, and Chong K. Yoon, “Microwave-Frequency Model and High-density Design of Multiple Line Grid Array (MLGA) Package”, 33rd International Symposium on Microelectronics, 2000.
  122. Woonghwan Ryu, Hyungsoo Kim, Seungyoung Ahn, Namhoon Kim, Baekkyu Choi, Joungho Kim “RF Interconnect for Multi-Gbit/sec Board-Level Clock Distribution” IEEE EPEP San Diego, USA, Oct. 1999. 
  123. Woonghwan Ryu, Hyungsoo Kim, Seungyoung Ahn, Joungho Kim “1.5-GHz Two-Phase Clocking Scheme Using Radio Frequency (RF) Clock Converter with 2-ps Dead Time and 3-ps Skew”, 1999 NGP Conference, Solvang, USA, Jul. 1999. 
  124. Hyungsoo Kim, Woonghwan Ryu, Seungyoung Ahn, Joungho Kim “A Wide Range CMOS Adaptive Output Driver for Customized Control of Signal Rise Time and Power/Ground Noise”, 1999 NGP Conference, Solvang, USA, Jul. 1999. 
  125. Woonghwan Ryu, Jonghoon Kim, Namhoon Kim, Hyungsoo Kim, Seungyoung Ahn, Sungil Kim, Hangok Song, Seungho Lee, Joungho Kim, “A Low-Cost and High-Density RF Multi-Chip Module Transceiver for 1.8-GHz Personal Communication Service”, IEEE ECTC, Las Vegas, USA, May 2000.
  126. Namhoon Kim, Woonghwan Ryu, Jonghoon Kim, Hyungsoo Kim, Seungyoung Ahn, Sungil Kim, Hangok Song, Joungho Kim, “Multi-Chip Module (MCM) RF Transceiver for 1.8 GHz Cellular Phone”, Symposium on Advances in Packaging, Singapore, Dec. 1999.
  127. Hyungsoo Kim, Jonghoon Kim, Woonghwan Ryu, Myunghee Sung, Seungyoung Ahn, Joungho Kim, “Suppression of Radiated Emission from an 8-bit Micro-Controller Using Gate-Oxide Filtering Capacitors” IEEE International Symposium on Electromagnetic Compatibility, Seattle, USA, Jul. 1999. 
  128. Woonghwan Ryu, Myung-Jin Yim, Junho Lee, Young-Doo Jeon, Seungyoung Ahn, Young-hwan Yun, Seog-heon Ham, Yong-hee Lee, Kyung-Wook Paik, Joungho Kim, “Microwave Frequency Model of Flip-Chip Interconnects Using Anisotropic Conductive Film.” HDP/MCM conference, pp. 311-315, USA, Apr. 1999.

Awards

Award Received

Motahisa Kanda Award 2021 (Most Cited Paper of IEEE Trans. on EMC in 2016-2020)

Jaehyoung Park, Dongwook Kim, Hyun Ho Park, Jong Hwa Kwon, Sang Il Kwak, and Seungyoung Ahn, “A Resonant Reactive Shielding for Planar Wireless Power Transfer System in Smart Phone Application,” IEEE Transactions on Electromagnetic Compatibility, 2017.

 

Young Scientist Award

Seungyoung Ahn, Korean Institute of Electromagnetic Engineering and Science, 2015

 

Certificate of Appreciation

Seungyoung Ahn, IEEE Electromagnetic Compatibility Society, for serving as a Distinguished Lecturer, 2021

Seungyoung Ahn, IEEE Microwave Theory and Techniques Society, for organizing IEEE WPTC, 2014

 

Best Paper Awards (International)

  • (Best Student Paper Award) Haerim Kim, Jongwook Kim, Yujun Shin, Jangyong Ahn, Dongwook Kim, Jaehyoung Park, Bumjin Park, Sungryul Huh, and Seungyoung Ahn, “Mitigation of Frequency Splitting Phenomena Using a Matching Capacitor in Wireless Power Transfer System for Automated Guided Vehicle,” IEEE Wireless Power Transfer Conference, 2020.
  • (Best Student Award) Karam Hwang, “Methods of Detecting Vehicle’s Longitudinal and Lateral Position Through Wireless Power Transfer,” Asian Wireless Power Transfer (AWPT) Workshop, 2017.
  • (Best Student Paper Award) Kibeom Kim, Karam Hwang, and Seungyoung Ahn, “Wideband Equivalent Circuit Model for a Through Silicon Via with Effective Substrate Current Loop,” IEEE Electrical Design of Advanced Packaging System, 2015.
  • (Best Student Paper Award) Seung Beop Lee, Seungyoung Ahn, and In Gwun Jang, “Development of the optimization framework for wireless power transfer systems,” IEEE Wireless Power Transfer Conference, 2014.
  • (Best Paper Award) Jonghoon Kim, Hongseok Kim, Mijoo Kim, Seungyoung Ahn, Jiseong Kim, and Joungho Kim, “Analysis of EMF Noise from the Receiving Coil Topologies for Wireless Power Transfer,” APEMC, 2012.
  •  (Best Poster Paper Award) Sunkyu Kong, Myunghoi Kim, Kyoungchoul Koo, Seungyoung Ahn, Bumhee Bae, and Joungho Kim, “Analytical Expressions for Maximum Transferred Power in Wireless Power Transfer Systems,” IEEE Electromagnetic Compatibility Symposium, 2011.

 

Best Paper Awards (Domestic)

  • (Best Paper Award) Seunghun Ryu, “Design of a Magnetic Field Communication System using a Giant Magneto-Impedance Sensor for Wireless Sensor Network,” Winter Conference, Korean Institute of Electromagnetic Engineering and Science 2022.
  • (Best Paper Award) Semin Choi, “Noise Path Modeling Technique for Switching IC for Electromagnetic Interference Analysis,” Winter Conference, Korean Institute of Electromagnetic Engineering and Science 2022.
  • (Best MS Thesis Award) Seok Hyeon Son, Future Vehicle Program, 2022.
  • (Best Paper Award) Dongryul Park, “Noise-Shaped Signaling Method for V2X Security,” Fall Conference, Korea Institute of Information & Telecommunication Facilities Engineering, 2021.
  • (Best Paper Award) Seok Hyeon Son, “Multiple Passive Shielding System for Reduction of Leakage Magnetic Field and Detection of Misalignment in Wireless Charging Electric Vehicle,” Summer Conference, Korean Institute of Electromagnetic Engineering and Science 2021.
  • (Best Paper Award) Seunghun Ryu, “Noncontact Interconnect Circuit Design using Capacitive Coupling Vehicular Environments,” Summer Conference, Korean Institute of Electromagnetic Engineering and Science 2021.
  • (Best Paper Award) Seok Hyeon Son, “A Vehicle Driving Lane Recognition System Based on Wireless Power Transfer for Autonomous Driving Electric Vehicles,” Winter Conference, Korean Institute of Electromagnetic Engineering and Science 2021.
  • (Best Paper Award) Jangyong Ahn, “Active Shield Coil Design and Control for Reduction of Leakage Magnetic Field in Wireless Power Transfer System,” Summer Conference, Korean Institute of Electromagnetic Engineering and Science 2020.
  • (Best Paper Award) Haerim Kim, “Analysis of Wireless Power Transfer System for Deep Brain Stimulation by Structure of Transmitter Coil and Receiver Coil,” Summer Conference, Korean Institute of Electromagnetic Engineering and Science 2020.
  • (Best Paper Award) Kibeom Kim, “Determination of Keep Out Zone for Through Silicon Via, Summer Conference, Korean Institute of Electromagnetic Engineering and Science 2019.
  • (Best Paper Award) Jaehyoung Park, “Reduction of Magnetic Field Leakage in Railway Wireless Power Transfer System,” Spring Conference, Korean Society of Urban Railway, 2019.
  • (Best Paper Award) Hyungwoong Kim, “Expectation of Signal in Power Cable from the Electromagnetic Pulse Transmission Through Metal Beam Concrete using System Identification,” Spring Conference, Korean Society of Urban Railway, 2019.
  • (Best Paper Award) Kibeom Kim, “Method for Detecting Lateral Non-Uniformity of Through Silicon Via,” MTT Society Seoul Chapter, Aug. 2018.
  • (Best Paper Award) Dongwook Kim, “Real-Time Warning System using Obstacle Detection and Driver Station Perception,” Summer Conference, Korean Society of Urban Railway, 2018
  • (Best Paper Award) Beomjin Park, “Magnetic Energy Harvesting for Railway Maintenance Sensor,” Summer Conference, Korean Society of Urban Railway, 2018
  • (Best Paper Award) Yujun Shin, “Positioning of Urban Railway using Magnetic Field of Wireless Power Transfer System,” Summer Conference, Korean Society of Urban Railway, 2018
  • (Grand Prize) Jaehyoung Park (Advisor: Seungyoung Ahn), “Safe Wireless Power Transfer System with Reduced Leakage Magnetic Fieldfor Wearable Device,” Creative Radio Contest, Korean Institute of Electromagnetic Engineering and Science, 2015
  • (Best Paper Award) Dongwook Kim and Seungyoung Ahn, “Wireless Power and Propulsion Transfer for Micro-Robot,” Spring Conference of the Korea Institute of Electrical Engineers, 2015. 
  • (Best Paper Award) Jaehyoung Park and Seungyoung Ahn, “Electromagnetic Field Reduction of Wireless Power Transfer System using Shielding Coil for Urban Railway Application,” Spring Conference of the Korean Society for Urban Railway, 2015.
  • (Gold Prize) Seungyoung Ahn, Namhoon Kim, and Joungho Kim, “Design and Implementation of RF Multi-Chip Module for 1.8 GHz Personal Communication Service”, HP EEsof Design Contest, Hewlett-Packard Korea, 1999. 

 

Best Student Awards in KAIST

  • (Inseong Award) Beomjin Park, KAIST, 2021
  • (Excellence Prize in Research, M.S. Student) Chanjun Park, CCS GSGT, KAIST, 2021
  • (Excellence Prize in Research, Ph.D. Student) Jaehyoung Park, CCS GSGT, KAIST, 2020
  • (Exemplary Award) Beomjin Park, GSGT, KAIST, 2019
  • (Best CA of KAIST) Beomjin Park, KAIST, 2019
  • (Gold Prize, KAIST Invention Award) Jaeyong Cho, KAIST, 2019
  • (Grand Prize in Research, Ph.D Student) Karam Hwang, CCS GSGT, KAIST, 2018
  • (Best GPA, M.S. Student) Yujun Shin, CCS GSGT, KAIST, 2018
  • (Grand Prize in Research, M.S Student) Dongwook Kim, CCS GSGT, KAIST, 2016
  • (Excellence Prize in Research, M.S. Student) Hwansoo Moon, CCS GSGT, KAIST, 2016
  • (Excellence Prize in Research, M.S. Student) Minho Kim, CCS GSGT, KAIST, 2016

 

Student Scholarship Award

  • (EMC Scholarship) Yujun Shin, Korean Institute of Electromagnetic Engineering and Science, 2021
  • (EMC Scholarship) Haerim Kim, Korean Institute of Electromagnetic Engineering and Science, 2020
  • (EMC Scholarship) Jangyong Ahn, Korean Institute of Electromagnetic Engineering and Science, 2019
  • (EMC Scholarship) Beomjin Park, Korean Institute of Electromagnetic Engineering and Science, 2018
  • (EMC Scholarship) Kibeom Kim, Korean Institute of Electromagnetic Engineering and Science, 2017
  • (EMC Scholarship) Jaehyoung Park, Korean Institute of Electromagnetic Engineering and Science, 2015
  • (EMC Scholarship) Hwansoo Moon, Korean Institute of Electromagnetic Engineering and Science, 2013

 

Other Awards

  • Most paper submissions award Seungyoung Ahn’s Lab, Winter Conference, Korean Institute of Electromagnetic Engineering and Science, 2022.
  • Most participations award Seungyoung Ahn’s Lab, Summer Conference, Korean Institute of Electromagnetic Engineering and Science, 2021.
  • Most participations award Seungyoung Ahn’s Lab, Winter Conference, Korean Institute of Electromagnetic Engineering and Science, 2021.
  • Most paper submissions award Seungyoung Ahn’s Lab, Summer Conference, Korean Institute of Electromagnetic Engineering and Science, 2019.

Research

WPT

  1. Wireless power transfer system for biomedical
(a)

 

(b)

Various of implantable medical device (IMD) Concept of the IMD with wireless power transfer technology (a) pacemaker, (b) Deep brain stimulator

 

As the effectiveness of an implantable medical device such as an artificial pacemaker, neuro-stimulator, or cochlear implant has been proven, it is widely used to treat various diseases. However, such an implantable medical device has a number of problems. The biggest problem is the battery. The battery life of implantable medical devices ranges from two to five years, that is, they need to be replaced every two to five years. In addition, complex structures can damage internal parts of the human body or cause necrosis of surrounding tissues. In order to solve the limitations of the implantable medical device, we are studying the application of wireless power transfer technology to the implantable medical device.In our laboratory, we are focusing on miniaturization of coils, securing safety (heat and electromagnetic wave effects), and improving stimulus performance to apply wireless power transfer technology to pacemaker and neuro-stimulator. The convergence of wireless power transfer technology with biomedical technology, a key field of the fourth industry, can lead the technological development.

 

  1. Wireless power transfer system in conductive medium

In recent years, the wireless power transfer technology is mainly focused on the inductive coupling method using time-varying magnetic field. Unlike in air, however, time-varying magnetic fields generate eddy current in conductive medium such as seawater. Therefore, new coil modeling method for eddy current loss analysis in conductive medium is being studied.

As WPT(wireless power transfer) technology is improved, attempts to apply it to various applications are increasing. Recently, WPT has been used for the purpose of supplying power to underwater robots that perform construction, resource exploration, and military operations.

Research of WPT mainly focused on the inductive coupling method using time-varying magnetic field. Unlike in air, however, time-varying magnetic fields generate eddy current in conductive medium such as seawater. Therefore, new coil modeling method for eddy current loss analysis in conductive medium is being studied.

 

  1. Wireless power transfer system for UAVs (Unmanned Aerial Vehicles)
WPT for UAVs (1 kW) WPT for drone (400 W)

Recently, unmanned aerial vehicles (UAVs) have been used in various fields such as military, hobby, and industry. There are various types of UAVs such as drones and missiles. Among them, the use of drones becomes particularly important.

We are studying on applying a wireless power transfer system to replace the wired charging system previously adopted in conventional UAVs. The power capacity of the application ranges from tens of W to hundreds of kW, and we are designing power circuits as well. If wireless power transfer system is applied to UAVs, it is expected that UAVs will be actively used in various fields.

 

  1. Wireless power transfer system for Electric Vehicles
WPT for Electric vehicles (15 kW) WPT for AGVs(Automated Guided Vehicle) (4 kW)

Electric vehicles (EVs) are environmentally friendly and cheaper than conventional fossil fueled vehicles. Therefore, demand for electric vehicles is expected to increase very rapidly in the future.

However, electric vehicles have various limitations, such as lack of operation time due to the limitation of the battery capacity and a high risk of electric shock during wired charging. Therefore, we are studying on applying a wireless power transfer system to replace the conventional wired charging system used in EVs. In addition, it will be applied not only to electric vehicles, but also to automated guided vehicles (AGVs), which play an important role in the unmanned systems of factories in the industry. If a wireless power transfer system is applied to EVs, many of the obstacles to the commercialization of EVs are expected to be solved.

 

  1. Magnetic energy harvesting system
Concept of magnetic energy harvesting system
Design of magnetic core Harvester connection

Power system requires constant inspection and preventive maintenance for proper fault-free operation. There are various devices to monitor and maintain the longevity of power system have been developed such as wireless sensors, brachiating robot, and so on. Most devices heavily rely on the battery which has a finite life span and is expensive to replace periodically. For this reason, magnetic energy harvesting is a promising technologies for self-sustainable operation of devices around power line. However, the magnetic energy harvester has a problem that magnetic core material is saturated at high current condition.

In our laboratory, we focus on the design of magnetic core with improved power density under the saturation condition. We verify the proposed modeling using Maxwell 3D EM simulation and measurement of the fabricated magnetic core using B-H Curve tracer. Furthermore, we actually implemented magnetic energy harvesting system to demonstrate in distribution system(22.9kV). 

 

  1. Optimal driving method with multiple TX Coils
Schematic of a multiple transmitters WPT system Circuit model of a multiple transmitters WPT system

Wireless power transfer (WPT) technology has been used in various applications such as smart phones, drones, pacemakers, and electric vehicles. However, when misalignment occurs, the efficiency decreases drastically. In order to solve this problem, usually a larger diameter transmitter(TX) coil is used to cover wide area. However, this approach has several drawbacks such as centralization of magnetic field and increasing EMF(Electromagnetic Field) problem. Therefore, we propose multiple TXs system that can make wide magnetic field uniformly and select optimal TX(s) to decrease power loss and EMF problem.

In our laboratory, we propose an optimal transmitter selection method for maximum power transfer efficiency that is robust against misalignment. Furthermore, we have plans for researches about receiver detecting method, EMF, EMI reduction method in WPT system using multiple coil, and so on.

 

EMC/SI/PI

  1. TSV modeling

Through-Silicon Via (TSV) has emerged as the packaging technology capable of integrating heterogeneous system on the same platform.  A typical TSV has a Metal-Oxide-Semiconductor (MOS) structure.

Chemical vapour deposition (CVD) or atomic layer deposition (ALD) can be used to deposit the SiO2 layer onto the Si substrate. During the SiO2 layer deposition process, the imperfections of charge type can exist in the SiO2 and at the Si–SiO2 interface. As the number of TSVs increases and the size of TSV decreases, oxide imperfections in TSV can cause serious problems in the system performance. To find optimal process condition for TSV formation, it is necessary to extract how much these imperfections are present in TSV under different process conditions.

 

  1. EMC optimal design using AI

 

Low power and high integrated circuits are required due to the development of electronic devices. So that the complexity of the system increases. Therefore, various EMC problems, not previously occurred, are generated. Experts with many experiences designed with enormous time to solve these problems. However, due to the increased complexity of the system, EMC design requires more expertise and advanced technologies.

Therefore, EMC LAB is researching about EMC design using AI. Designing with AI changes various design parameters in complex systems with minimizing process. With AI, the optimal design that could not formulate in the past and the reduced simulation time such as EM and circuit are achievable.

 

  1. Modeling of various channel pattern in the server board
A conceptual illustration of signaling channel application to server board

In recent year, artificial intelligence technology is in the spotlight, and accordingly, it is required to improve the performance of the signaling channel of the server board. Thus, various channel patterns is studied for achieving signal integrity. To understand the characteristics of these various channel and design them to meet the demands of technology trends, signal integrity modeling is required. Through the signal integrity modeling, it is possible to design channels to meet next-generation needs through prediction and analysis on characteristics of each channel.

 

  1. Active Shielding Method

Currently, the utilizations of Unmanned Aerial Vehicle (UAV) are increasing, in the area of surveillance, geometric information, intelligent transportation system, and package delivery. However, the UAV has the on-board power limitation that is caused by the limited battery capacity, and battery capacity increases are accompanied by weight increase, so UAV operation will not be efficient. For this UAV limitation, the applications of wireless power transfer (WPT) technologies to the UAV are drawing attention.

However, the IPT systems for UAV charging require high electric power compared to the portable device. This means that the high density magnetic field will generate around IPT system. In addition, this strong magnetic field could be a leakage magnetic field. This leakage magnetic field influences the negative effect to human. The electromagnetic field (EMF) generating from UAV charger could be the severe safety issues compared to portable device. This is because that the IPT system of the UAV generates a high density magnetic field, but humans can adjacent to the charger like portable device. The active shielding system can be considered as the alternative to reduce the EMF of the IPT system. A principle of the active shielding is to eliminate the leakage magnetic field by generating the cancelling magnetic field. The cancelling magnetic field has the opposite vector direction with the leakage magnetic field so two magnetic fields are eliminated each other in terms of the phasor.

The active shielding system can be considered as the alternative to reduce the EMF of the IPT system. A principle of the active shielding is to eliminate the leakage magnetic field by generating the cancelling magnetic field. The cancelling magnetic field has the opposite vector direction with the leakage magnetic field so two magnetic fields are eliminated each other in terms of the phasor. The independent active shielding system is to supply shielding power from the independent power source. Power supply of the active shielding system is controlled corresponding to the strength and phase of the leakage magnetic field. Based on this control, shielding performance will enhance compared with the precedent shielding method.

 

  1. Reactive Shielding Method
WPT system without reactive shield WPT system with reactive shield
Principle of reactive shield

In order to reduce leakage magnetic field, Our laboratory has proposed the reactive shielding method. The reactive shielding method is to eliminate leakage magnetic field by generating cancelling magnetic field. The cancelling magnetic field has the opposite magnetic field vector with leakage magnetic field so leakage magnetic field is reduced by cancelling magnetic field. Reactive shield generates cancelling magnetic field by excited leakage magnetic field from TX and RX coil. The advantages of reactive shield is that low heat is generated than aluminium shielding, and application requirement is reduced then active shielding system. In addition, the reactive shielding method is accompanied by low efficiency decreases than precedent shielding method.

Wireless power transfer technology enables to charge electronic devices without any physical wire connections. To transfer the power wirelessly, the time-varying magnetic field is generated from the source coil. Unlike the transformer, the leakage magnetic field due to the large air gap between the coils cannot be neglected. As the WPT technology is more widely used, human exposure to time varying electromagnetic fields(EMFs) accordingly increases. Also, harmonic leakage electromagnetic field generated from WPT systems can affect other electronic application. A method for reducing the leakage magnetic field is required in order to commercialize wireless charging system. However, the conventional electromagnetic field reduction methods need to reduce the volume and weight of shield for implementation.

In our laboratory, we propose a planar resonant reactive shield to reduce the electromagnetic field and harmonic electromagnetic interference. Unlike the other conventional shields, the planar resonant reactive shield requires minimal additional size and reduce the leakage electromagnetic field with negligible degradation in power transfer efficiency.

 

  1. Electromagnetic Field (EMF) Human Exposure

Currently, to consider the safety issues generated by the wireless power transfer (WPT) system, human exposure to EMF should be assessed and compliance with international safety guidelines and standards (ICNIRP 1998, ICNIRP 2010, IEEE 2002, and IEEE 2005). In particular, for an internal electronics inside the body, the human body exposure should be evaluated by the electromagnetic field radiation emitted from the external source, and also the effect on the device itself should be considered. In addition, if the internal device is charged by WPT, unlike the human exposure from the external source, power transmission and reception occurs via internal human medium, an appropriate assessment method should be developed.

Teaching

GT642, Wireless Power Transfer System

GT506 (PD551), Fundamentals of Vehicular Electric Systems

Students

Jangyong Ahn

EMI/EMC, EMF

Yujun Shin

EMF/EMI, Wireless power transfer system

Kyunghwan Song

EMI shielding

Haerim Kim

Wireless power transfer for medical devices

Hyunwoong Kim

EMC, Signal integrity

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