Asymmetric Doherty power amplifier improve bandwidth with parallel architecture

This article presents an asymmetric Doherty power amplifier (DPA) with parallel architecture. Analysis is conducted to explain the relationship between broadband performance and parallel architecture. A commercial GaN HEMT device is used to validate the broadband of proposed DPA. 9-14 gain and 44 dBm saturated power is completed by the parallel DPA. 43-50% and 61-64% drain efficiency (DE) is obtained at 8 dB output power back-off (OBO) and saturation, respectively.