Systematic Load-pull and Impedance Matching for Enhanced Efficiency Power Amplifier

This paper presents the design of a Class-E power amplifier (PA) using GaN transistor, achieving high efficiency through optimized matching networks.The proposed PA employs a systematic matching network optimization strategy to enhance power transfer and minimize losses, while utilizing a fixed bias circuit for stable operation.Measurement results demonstrate an output power around 37 dBm, a drain efficiency and power added efficiency of more than 85% and 80% respectively, and a gain of around 11 dB at 1 Ghz operating frequency, validating the effectiveness of the design.The results confirm suitability of GaN technology for high-efficiency RF power amplification, with potential applications in wireless communication and radar systems.