High Efficiency C-band Monolithic Power Amplifiers

This paper describes the design, fabrication and measured performances of C-band monolithic two-stage and three-stage amplifiers. These two on-chip fully matched versions designed for class-AB operation demonstrate 7 Watt output power over the 5 - 6 GHz frequency range with associated power added efficiency higher than 30% and gains of respectively 20 and 29 dB.