Design of broadband high efficiency power amplifiers based on the hybrid continuous inverse mode
In this paper, a hybrid continuous inverse mode for designing broadband high efficiency power amplifiers (PAs) is for the first time analyzed mathematically. The hybrid continuous inverse mode contains the classical continuous inverse Class F mode, the continuous inverse F mode with maximally flat current waveforms and the inverse Class B to Class J continuum mode and so on, which provides alternative design space for realizing the broadband high efficiency PAs. And a high efficiency PA at the center frequency of 3.45 GHz is designed to verify this theory. Experimental results show that the implemented PA can output 10.5 16 W saturation power with drain efficiency (DE) over 70% from 3.2 to 3.7 GHz. Meanwhile, for a 5 MHz two tone signal, drain efficiency of 40.3% 48% is measured with an average output power of 34 36.5 dBm at a two tone carrier to intermodulation ratio (C/I) of 30 dBc.
2016 IEEE MTT S International Microwave Symposium (IMS)