166 / 2019-06-19 17:29:24

Design of a Broadband Chireix Combiner Based On Class F Power Amplifier

outphasing, power amplifier, Chireix power combiner, bandwidths, Class F PA

This work aims to evaluate factors that limit the bandwidth of a two-input Chireix outphasing PA based on GaN devices. In order to evaluate the effect of the device compensation component and the power combiner on the bandwidth, a new synthesizer structure was proposed instead of the compensation component. The analysis of the output circuit shows that the phase compensating element of conventional Chireix power combiner limits the bandwidth of the outphasing power amplifier system. Based on this conclusion, a novel chireix power combiner and a broadband Class-F PA are proposed in this work. The best efficiency is achieved in the range from 2.6 to 3.6 GHz. The simulation results report that the DE and output power from 2.6 to 3.6 GHz are ≥60% and ≥43 dBm, respectively.