Broadband, High Efficiency, Class J Power Amplifier Design Method with Compensating Drain-Source Capacitance

摘要

A broadband, high efficiency, class J power amplifier (PA) design uses the relationship between drain efficiency and the ratio of drain-source capacitance to load impedance. In addition, multisection matching is applied at the input and output to expand the bandwidth. A wideband class J PA designed with this approach and a Wolfspeed CGH40010F GaN HEMT achieved 40.0 to 41.5 dBm output power with 60 to 68 percent drain efficiency and an adjacent channel power ratio better than -30 dBc from 1.4 to 3.6 GHz.