A 60 GHz 19.6 dBm Power Amplifier With 18.3% PAE in 40 nm CMOS

This letter reports a fully integrated 60 GHz power amplifier (PA) implemented in TSMC 40 nm CMOS technology. This PA is based on a three-stage two-way differential topology with an output transformer-based power combining network. This topology improves layout symmetry and mitigates parasitic effects between different signal paths to increase overall efficiency. The use of parasitic coupling capacitors inside a vertically-coupled transformer can increase impedance transformation ratio. This PA achieves 20.3 dB power gain, 19.6 dBm output power with 18.3% peak PAE, and 12 GHz bandwidth.