In this paper, a broadband power amplifier with high efficiency and output power based on GaN HEMT is presented. The design of broadband matching network and transistor package modeling is presented, and a simulation strategy is proposed to increase the simulation accuracy. According to measured results, the PA module shows a linear gain of 10~13 dB during 1.9-4 GHz. The efficiency can reach 74.5%, and the maximum output power reaches 33.2 Watt. For a 5-MHz WCDMA signal, the designed power amplifier achieves an average output power above 20 W when ACLR = -30 dBc over the entire working band.
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