Papers & Patents

INTERNATIONAL JOURNALS

·         J. Jung, ... , S. Lee*, "Compact Differential Power Dividers with Arbitrary Complex Terminations for 6G FR3 Communication," in IEEE Transactions on Microwave Theory and Techniques, (Early Access, 2026.04) (*: Corresponding Author)

·         H. Park, ... , S. Lee, S. Hong, J. Park*, "A 24–30-GHz Small-Size High Isolation CMOS Common-Leg T/R Front-End IC With Variable-Gain Phase Shifter and Path Control Network," in IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 73, pp. 148-152, Feb. 2026 

·         E. Mo, ... , S. Lee*, J. Park*, "A Ku-Band CMOS Two-Way In-Phase Power Combining Amplifier With 26.3-dBm P sat and 1.1° AM–PM Distortion," in IEEE Microwave and Wireless Technology Letters, Early Access, 2025 (*: Co-Corresponding Author)

·         D. Kim, ... , S. Lee*, M. Lee*, "Model-Based Variation-Aware Optimization for Offset Calibration and Pre-Sensing in DRAM Sense Amplifiers," in IEEE Access, vol. 13, pp. 14165-14176, 2025 (*: Co-Corresponding Author)

·         S. Kim, ..., S. Lee, ...,  M. Lee, "Passing Word Line-Induced Subthreshold Leakage Reduction Using a Partial Insulator in a Buried Channel Array Transistor," in IEEE Transactions on Electron Devices, vol. 71, no. 5, pp. 2976-2982, May 2024

·         S. Lee, J. Park, and S. Hong, "W-band Compact Balun-embedded SPDT Switch with Leakage-canceling Overlapped Transformers," in IEEE Microwave and Wireless Technology Letters, Nov. 2023

·         S. Lee and S. Hong, "Frequency-Reconfigurable Dual-Band Low-Noise Amplifier With Interstage Gm-Boosting for Millimeter-Wave 5G Communication," in IEEE Microwave and Wireless Technology Letters, vol. 33, no. 4, pp. 463-466, April 2023

·         S. Lee, J. Park, and S. Hong, “Millimeter-wave Multi-band Reconfigurable Differential Power Divider for 5G Communication”, IEEE Transactions on Microwave Theory and Techniques, vol. 70, no. 1, Jan. 2022

·         S. Lee, J. Park, and S. Hong, “Antenna Switch Embedded in Transmission Line Transformers of Differential PA and LNA”, IEEE Microwave and Wireless Components Letters, vol. 29, no. 2, pp.131-133, Mar. 2021.

·         S. Lee, J. Park, and S. Hong, “A Ka-Band Phase-Compensated Variable-Gain CMOS Low-Noise Amplifier”, IEEE Microwave and Wireless Components Letters, vol. 31, no. 3, Feb. 2019.

·         H. Jin, S. Lee, G. Jeong and S. Hong, "28-GHz Dual-Mode Phase-Invariant Variable-Gain Amplifier With Phase Compensators," in IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 69, no. 11, pp. 4263-4267, Nov. 2022

·         J. Park, S. Lee, J. Chun, L. Jeon and S. Hong, "A 28-GHz Four-Channel Beamforming Front-End IC With Dual-Vector Variable Gain Phase Shifters for 64-Element Phased Array Antenna Module," in IEEE Journal of Solid-State Circuits, vol. 58, no. 4, pp. 1142-1159, April 2023.

·        J. Park, S. Lee and S. Hong, "A 24–40 GHz Differential SPDT Switch With an NMOS and PMOS Alternating Structure and Leakage-Canceling Capacitors," in IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 70, no. 1, pp. 86-90, Jan. 2023

INTERNATIONAL CONFERENCES

·         M Lee, W Lee, H Song, H Kim, S Jang, HD Lee, B Park, S Lee, J Park, "A Ka-Band Variable-Gain Phase Shifter for 6G NTN with LEO Satellites", 2025 16th International Conference on Information and Communication Technology Convergence (ICTC)
·         K. Kim, J. Lee, J. Park, and S. Lee, "A Ka-band Low-Noise Amplifier with Co-optimized Magnetic-Coupled Gm-Boosting and Parallel Inductor for 5G FR2 and 6G LEO SATCOM", IEEE Asia Pacific Conference on Circuits and Systems 2025 (APCCAS 2025)
·         H Park, M Lee, E Jo, H Song, S Lee, J Park, "A 15-20GHz CMOS Variable-Gain Phase Shifter for UAV Detection Radar Systems", IEEE Asia Pacific Conference on Circuits and Systems 2025 (APCCAS 2025)
·         H Song, W Lee, M Lee, H Kim, S Wang, HD Lee, B Park, S Lee, J Park, "A Ka-Band VGA and Its Application to Four-Element Beamforming IC for LEO Satellite Communication", IEEE RFIT 2025
·         S Lim, W Lee, E Mo, E Oh, S Kong, HD Lee, B Park, S Lee, J Park, "A Ku-Band CMOS Power Amplifier with 37.6% Peak PAE and 22.5 dBm Psat for 6G Applications", IEEE RFIT 2025
·         M Lee, S Lim, E Oh, GH Ko, SK Ryu, ET Sung, D Baek, JR Yang, S Lee, J Park, "A V-Band Transmitter Front-End IC for Phased-Array FMCW Radar with Impedance-Invariant Variable-Gain Phase Shifter", IEEE RFIC 2025

·         J. Park*, S. Lee*, and S. Hong, “A 28GHz 20.3%-Transmitter-Efficiency 1.5°-Phase-Error Beamforming Front-End IC with Embedded Switches and Dual-Vector Variable-Gain Phase Shifters, 2019 IEEE International Solid-State Circuits Conference - (ISSCC), San Francisco, CA, USA, 2019, pp. 176-178.

ISSCC: Top Conference in Circuit Fields *: Equally Credited Author

·         S. Lee, J. Park, and S. Hong, “A 24–30 GHz Low-Loss Compact Differential Four-Way Power Divider,” in Proc. International Microwave Symposium (IMS), Atlanta, GA, USA, 2021.

PATENTS

·        J. Park, S. Lee, et al., “Packaging Structure  for  Efficient  Coupling  of  a  Heat Sink  to  a Vehicle  Radar  Module,  and  Method for Manufacturing the  Same” Republic of Korea Patent Application, 10-2026-0015195, Jan. 26th, 2026

·        J. Park, S. Lee, et al., “n-pole-n-throw switch with high isolation,” Republic of Korea Patent Application, 10-2026-0050267, Mar. 20th, 2026

·        J. Park, S. Lee, et al., “VARIABLE GAIN PHASE SHIFTER USING ORTHOGONAL VECTOR,” Republic of Korea Patent Application, 10-2026-0049582, Mar. 19th, 2026

·        J. Park, S. Lee, et al., “MULTI-BEAM BEAMFORMING INTEGRATED CIRCUIT WITH I/Q PRE-WEIGHTING TECHNIQUE, AND MULTI-BEAM BEAMFORMING MODULE AND MULTI-BEAM BEAMFORMING SYSTEM INCLUDING THE SAME,” Republic of Korea Patent Application, 10-2026-0046912, Mar. 16th, 2026

·        J. Park, S. Lee, et al., “ACTIVE TRUE TIME DELAY CIRCUIT INCLUDING QUASI-QUADRANT GENERATOR, AND DELAY CIRCUIT AND TRANSCEIVING CIRCUIT INCLUDING THE SAME,” Republic of Korea Patent Application, 10-2025-0196172, Dec. 11th, 2025

·         J. Park, S. Lee, et al., “Dual Frequency Path Antenna SPDT Switch with Shared Resonating Inductor,” Republic of Korea Patent Application,

10-2025-0136112, Sep. 22nd, 2025

·         J. Park, S. Lee, et al., “Channel Switching Module Including Leakage Signal Canceling Circuit” Republic of Korea Patent Application, 10-2025-0059196,
May 7th, 2025

·         J. Park, S. Lee, et al., “Antenna Switching Module and Electronics Device Including It” Republic of Korea Patent Application, 10-2024-0149875, Oct. 29th, 2024

·         S. Lee, J. Park, and J. Lee, “Balun-Embedded SPDT Switch With Leakage-Canceled Overlapped Transformers,” Republic of Korea Patent Application,

10-2024-0030680, March 4th, 2024

·         S. Lee, J. Park, and S. Hong, “Phase Compensated Variable Gain Amplifier,” Republic of Korea Patent Application Publication, 10-1948014-0000, Feb. 08, 2019.

·         S. Lee, J. Lee, H. Choi, and S. Hong, “6 Port RF Modulator and Management Method of the Same,” Republic of Korea Patent Application Publication, 10-1764292-0000, Jul. 27, 2017.

DOMESTIC JOURNALS

·        J. Lee and S. Lee, "A Ka-Band Low-Noise Amplifier In FD-SOI Process" 대한전자공학회논문지, Vol.61, No.10, October 2024