Internally-matched GaN HEMT high efficiency power amplifier for Space Solar Power Stations

In this paper, an internally-matched GaN HEMT high efficiency amplifier for Space Solar Power Stations/System (SSPS) is presented. The internal matching circuit was designed so that 2
^nd
and 3
^rd
harmonics are tuned to obtain maximum power added efficiency (PAE). PAE of 70% was successfully obtained with 7W output power at 5.8GHz. All matching circuit is in a hermetically sealed package and no external matching component is necessary. It will enable to shrink volume and mass of modules loaded onto SSPS satellites.