Broadband Parallel Doherty Power Amplifier in GaN for 5G Applications

This work presents a wideband parallel symmetric Doherty power amplifier with 300 MHz bandwidth and 8 dB power back-off dynamic range for potential base-station applications. The PA operates from 3.3 to 3.6 GHz with over 9 dB of gain and maintains an output power of 45 dBm at 3dB gain compression. Simulation results show peak drain efficiency from 67% to 73% across the frequency band, and 46% to 54% efficiency across the band at 8 dB output power back-off. The benefits and drawbacks of designing a parallel Doherty amplifier compared to a conventional Doherty are highlighted within this paper.