High-efficiency dual-frequency power amplifier based on low-pass matching network and design method thereof

The invention discloses a high-efficiency dual-frequency power amplifier based on a low-pass matching network and a design method thereof. The power amplifier comprises an input matching network, a gate bias circuit, a transistor, a drain bias circuit and an output matching circuit based on the low-pass matching network, wherein the input matching network uses a stepping impedance matching circuit for matching; the output matching circuit comprises a drain biasing circuit, a harmonic matching network and a fundamental wave matching circuit; the harmonic matching network is used for realizing harmonic control and low-pass filtering so as to suppress harmonic waves; and the fundamental wave matching circuit is used for realizing dual-frequency matching in a required frequency band. According to the invention, control and suppression of harmonic waves can be realized, so that high-efficiency output under two frequencies is realized. 本发明公开了一种基于低通匹配网络的高效率双频功率放大器及其设计方法，其中功率放大器包括输入匹配网络、栅极偏置电路、晶体管、漏极偏置电路与基于低通匹配网络的输出匹