Young-Seok Lee > Researchers | 서울대학교 전자파 융합 연구실

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 (Publish expected: Aug. 2025).
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*, “Effects of Magnitude Dynamic Range Constraints on MIMO Wireless Power Transfer Efficiency," International Symposium on Antennas and Propagation (ISAP), Fukuoka, Japan, Oct. 27-31, 2025.
T. Yoon, Y.-S. Lee, M. Kim, S. Lee, J. Lee, S. Nam, and J. Oh*, "Overcoming Efficiency Degradation in Wireless Power Transfer Systems: A Supply Voltage Modulation Method Empowered by 5.64-GHz 256-Element Antenna Array Receiving 10.6-Watt," IEEE MTT-S International Microwave Symposium (IMS), San Francisco, CA, USA, Jun. 15-20, 2025.
Y.-S. Lee, J. Oh, and S. Nam*, “Sequential Feedback-Based Phase Optimization Using Hadamard Basis for Wireless Power Transfer,” IEEE Wireless Power Technology Conference and EXPO (WPTCE), Rome, Italy, Jun. 3-6, 2025. (Selected for Ph.D. Students Initiative Program)
Y.-S. Lee, J. Oh, and S. Nam*, “An Effect of Time Reversal Based Multiple Beacon Selection on Wireless Power Transfer Performance,” International Symposium on Antennas and Propagation (ISAP), Incheon, Rep. of Korea, Nov. 5-8, 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), Kyoto, Japan, May 8-11, 2024. (Selected for Student Travel Grant)
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), Sapporo, Japan, Aug. 19-26, 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 KIEES Winter Conf., 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 KIEES Winter Conf., Feb. 2025.
Y.-S. Lee, S. Nam, and J. Oh*, “Convex optimization을 통한 RF-DC 효율 향상 기법이 적용된 고효율 무선전력전송 시스템,” 2024 KIEES Summer Conf., Aug. 2024.
H.Y. Kim, Y.-S. Lee, and S. Nam*, “마이크로파 무선전력전송에서 다중 수신기의 충전을 위한 알고리즘 연구,” 2021 KIEES Autumn Conf., 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))