W-Band Coplanar Medium Power Amplifier

Two compact coplanar 90-112 GHz amplifier MMICs are presented. The measured gain for both designs exceeds 22 dB at 100 GHz with output powers of 14.6 and 15.7 dBm for the smaller and larger MMICs, respectively, and the power-added efficiency is 3.5% and 5.2%. To the author’s knowledge, this is the highest reported power and power-added efficiency for a W-band coplanar amplifier.