连续 F类功放(PA)通过引入修正因子, 减轻功放对基波和二次谐波阻抗的要求, 从而扩展 F类功放的带宽。本文在连续 F类功放基础上, 提出一种新型修正型连续 F类工作模式。通过引入电阻性二次和三次谐波阻抗进一步扩展连续 F类功放的设计空间, 使其可实现多个倍频程带宽。基于此理论, 采用负载牵引方法对基波和谐波进行最佳阻抗提取, 结合实频技术设计功放匹配网络, 实现了一款超宽带高效率功率放大器。该功放在 0.4~2.2 GHz频段内, 饱和输出功率为 39.8~41.4 dBm, 漏极效率在 59%~79%之间, 增益大于 10 dB。仿真与测试结果良好, 验证了该方法的正确性。

The continuous Class-F Power Amplifier(PA) can mitigate the requirement of fundamental and second harmonic impedances by introducing a modified factor, thus extending the bandwidth of class-F PAs. In this paper, a new modified continuous Class-F mode is proposed. The design space is extended by introducing the resistive second and third harmonic impedance, so that it can realize multi-octave bandwidth. Based on this theory, an ultra-broadband high-efficiency power amplifier is realized showing 59%-79% drain efficiency,39.8-41.4 dBm saturation output power and large signal gain above 10 dB in 0.4-2.2 GHz frequency range. The simulation and test results are good, which verifies the validity of the methodology.