Solid state power amplifiers for satellite communication: A feasible solution

This paper presents the results of an Engineering Model of a complete SSPA, developed for Galileo, the European Global Navigation Satellite System (E1 band, 1575.42 MHz), and based on UMS GaN (GH50-10) technology. The SSPA includes also satellite interfaces (e.g., internal power supply generation unit, telemetry and telecommand functionalities) and measured results show an output power larger than the targeted 230W, with a PAE greater than 40%. The idea is to have a reliable and performing power amplifier capable to replace the current solution based on the adoption of a Travelling Wave Tube Amplifier (TWTA) at a lower mass, weight and higher efficiency.