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This paper presents the nonlinearity modeling of a 2.14-GHz gallium nitride Chireix outphasing power amplifier (PA). The outphasing PA consists of two branches of class-F PAs achieving high efficiency and good phase linearity and a transmission-line-based Chireix power combiner. An analytical model of outphasing PAs with a Chireix power combiner is developed to explain observed distortion due to the...
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