Concurrent high-efficiency tri-band GaN power amplifier with continuous class-E mode

This paper presents a concurrent high-efficiency tri-band power amplifier with the continuous class-E mode. The continuous class-E power amplifier can perform high-efficient concurrently at some operational frequencies by manipulating the fundamental and second harmonic impedances of the transistor. After selected the design parameters of the proposed tri-band power amplifier, the output and input microstrip lines matching network are directly optimizing by the mixed particle swarm optimization-genetic algorithm, which can accelerate the convergence speed of the matching networks comparing with the standard particle swarm optimization algorithm. To verify the proposed design methodology, a tri-band power amplifier at 1.7 GHz, 2.6 GHz and 3.0 GHz is designed. The measured results show that the fabricated power amplifier delivers more than 40 dBm output power with 62%, 64% and 64% PAE at 1.7 GHz, 2.6 GHz and 3.0 GHz, respectively.