Researchers

Young-Seok Lee

Ph.D. Student

Department of Electrical and Computer Engineering Seoul National University 1 Gwanak-ro, Gwanak-gu, Seoul, Korea

Building 132 Room 311

ryanlee@snu.ac.kr

Research Interest

Wireless Power Transfer System, Target detection algorithm, and Indoor Localization

Research Experiences

  • Large-Area WPT System for Power Gateway Application – Samsung A-Lab.
  • 2D Array WPT System Design & Fabrication, and Operation Software & Algorithm Development – Samsung A-Lab.
  • Feedback-based WPT Beam-focusing Algorithm for Real-time Systems – Samsung DS
  • WPT System Link Budget, mmWave Antenna Array Design and Fabrication – Samsung Research(SR)

Publication

International Journals

  • Y.-S. Lee, T. Yoon, M. Kim, S. Lee, B. Jung, J. Oh, and S. Nam*, “A Design and Characterization Method of a Scalable Large Transmitting Array for Wireless Power Transfer,” IEEE Trans. Microw. Theory Tech. (T-MTT), Early Access.
  • H.Y. Kim, Y.-S. Lee, and S. Nam​*, “Efficiency Bound Estimation for a Practical Microwave and mmWave Wireless Power Transfer System Design,” Journal of Electromagnetic Engineering and Science (JEES), vol. 23, no. 1, pp. 69-74, Jan. 2023.

International Conferences

  • Y.-S. Lee, J. Oh, and S. Nam*, “An Effect of Time Reversal Based Multiple Beacon Selection on Wireless Power Transfer Performance,” IEEE International Symposium on Antennas and Propagation (ISAP 2024), ​Incheon, Rep. of Korea, Nov. 2024. (Best Paper Award, 2nd Prize) 
  • Y.-S. Lee, T. Yoon, S. Lee, M. Kim, J. Lee, J. Oh, and S. Nam​*, “LUT-Based Transmit Mode Calibration Reduction Method for Wireless Power Transfer,” IEEE Wireless Power Technology Conference and EXPO (WPTCE 2024), Kyoto, Japan, May 2024.
  • Y.-S. Lee and S. Nam​*, “Test Count Reduction Algorithm for Determining the Optimal Phase in Wireless Power Transfer using Bayesian Optimization,” XXXVth URSI General Assembly and Scientific Symposium (URSI/GASS 2023), Sapporo, Japan, Aug. 2023.

Domestic Conferences

  • Y.-S. Lee, T. Yoon, J. Oh, and S. Nam*, “Received DC Power Maximization in a Practical Wireless Power Transfer Systems,” 2025 Winter KIEES, Feb. 2025. (Best Paper Award, 1st Place)
  • T. Yoon, Y.-S. Lee, M. Kim, S. Lee, and J. Oh*, “Comprehensive Optimization of Beamforming Wireless Power Transfer: Achieving 500W Power Saving through Hardware-Aware Convex Method and Supply Voltage Modulation,” 2025 Winter KIEES, Feb. 2025.
  • Y.-S. Lee, S. Nam, and J. Oh*, “Convex optimization을 통한 RF-DC 효율 향상 기법이 적용된 고효율 무선전력전송 시스템,” 2024 Summer KIEES, Aug. 2024.
  • H.Y. Kim, Y.-S. Lee, and S. Nam*, “마이크로파 무선전력전송에서 다중 수신기의 충전을 위한 알고리즘 연구,” 2021 Autumn KIEES, Nov. 2021.

Patents

  • S. Nam and Y. Lee, “METHOD FOR DETERMINING OPTIMAL PHASES OF ANTENNA ARRAY IN RECONFIGURABLE INTELLIGENT SURFACE AND RIS SYSTEM USING THE SAME” (Patent No.: 1027047370000 (2024.09.04))
  • S. Nam and Y. Lee, “METHOD FOR DETERMINING OPTIMAL PHASES OF ANTENNA ARRAY IN TRANSMISSION ANTENNA AND A BEAM FOCUSING ARRAY SYSTEM USING THE SAME” (Patent No.: 1026925510000 (2024.08.01))

Honors and Awards

[Conferences]

  • 2025 KIEES Winter Conference, Best Paper Award, 1st Place (1st author)
  • 2024 IEEE International Symposium on Antennas and Propagation (ISAP 2024) Student Paper Contest, Best Paper Award, 2nd Prize (1st author)

[External Contests]

  • IEEE Seoul Section Student Paper Contest, Bronze Prize, Dec. 2024. (2nd author)
  • KCA 23rd Student Paper Competition in Propagation, Excellence Award, Nov. 2024. (2nd author)
  • KIEES 9th Electromagnetic Measurement Paper Competition, Excellence Award, Mar. 2024. (1st author)

Activities

[Undergraduate TA]

  • 2nd Semester, 2024 - Introduction to Electromagnetism with Practice (기초전자기학 및 연습, 430.202B 002)
  • 1st Semester, 2023 - Electromagnetic Wave Engineering (전파공학, 430.464A 001)

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