Design of a Highly Efficient Class-F GaN MMIC Power Amplifier Using a Multi-Function Bias Network and a Harmonic-Isolation L-C Resonator. - Jie Shi; Xiaohu Fang; Changning Wei; Tao Lin; Luyu Zhao; Kwok-Keung Michael Cheng (IEEE Trans. Circuits Syst. I Regul. Pap., 2023)