High-Efficiency Low Voltage Inverse Class-F Power Amplifier Design Based on Harmonic Control Network Analysis

摘要

A high-efficiency inverse Class-F (Class-F-1) power amplifier (PA) with a low voltage pHEMT is presented in this paper. The design process is based on a novel harmonic control network (HCN), consisting of a bias circuit (BC) and a low pass filter (LPF). The goal is reducing the impact of fundamental frequency reflection on DC supply, elimination of harmonics, improvement of power added efficiency (PAE), shaping the voltage and current waveforms along with enhancing the performance of the PA. The simulation is performed based on the harmonic balance analysis in order of 9. The implemented Class-F-1 PA is simulated and measured at 2.4 GHz. The maximum measured PAE of 76% and the drain efficiency of 82% are achieved, with a low drain voltage of 3 V and 11.2 dB gain under a 16 dBm input power. The proposed PA is fabricated and measurement results validated the simulations.