A 60-GHz Symmetric Doherty Power Amplifier with 20.4% 6-dB Back-off Efficiency

A reduced-complexity symmetric Doherty power amplifier (PA) for 60 GHz band is demonstrated in 45nm CMOS silicon on insulator. The output network is synthesized for reduced components to obtain low combiner loss and high back-off efficiency. The achieves a measured output power of 14 dBm and a measured power-added efficiency (PAE) at 6-dB back-off of 20.4%, which verifies the advantage of the proposed combiner design.