A Frequency Tunable Quadrature Coupler With Wide Tuning Range of Center Frequency and Wide Operating Bandwidth. - Yu Fei Pan; Shao Yong Zheng; Yong Mei Pan; Yuan Xin Li 002; Yunliang Long (IEEE Trans. Circuits Syst. II Express Briefs, 2018)

Highly Reconfigurable Dual-Band Coupler With Independently Tunable Operating Frequencies. - Yu Fei Pan; Shao Yong Zheng; Yong Mei Pan; Yuanxin Li 002; Yunliang Long (IEEE Trans. Ind. Electron., 2019)

Highly Reconfigurable Dual-Band Coupler With Independently Tunable Frequency and Coupling Coefficient at the Lower Band. - Yu Fei Pan; Shao Yong Zheng; Wonbin Hong; Wing Shing Chan (IEEE Trans. Ind. Electron., 2021)

Input Phase Controlled Doherty Power Amplifier With Out-Phased Current Load Modulation for Arbitrary Output Back-Off. - Bai Hua Zeng; Yu Fei Pan; Fu Cheng Yuan; Wing Shing Chan; Shao Yong Zheng (IEEE Trans. Circuits Syst. I Regul. Pap., 2025)