Broadband class E GaN power amplifier design in S band with low-pass match

A high efficient broadband GaN HEMT power amplifier with low-pass match networks is presented for use from 2.7 to 3.7 GHz. A low-pass filter-matching is designed for the output match and input match, which provides optimized fundamental and harmonic impedances. The amplifier delivers 38.3 dBm output power, with a power-added efficiency of 70–74% and a gain of 11–15 dB throughout the band.