High Power Amplifiers Technology
Under the Horizon 2020 Framework Programme for Research and Innovation in Satellite Navigation, which covers mainly GNSS Evolutions Technology R&D activities, ESA is developing a Solid State Power Amplifier (SSPA) at Engineering Model (EM) level for the next generation of Galileo satellites. Potential evolutions of Galileo require, at navigation payload level, more demanding requirements in terms of output power, flexibility and efficiency. Increased EIRP at satellite level requires in turn increased output power from the amplifier driving the antenna and therefore the consideration of new technologies is essential. Solid State Power Amplifiers (SSPA) based on Gallium Nitride (GaN) are potential candidates. The wide bandgap of GaN allows a higher breakdown electric field and therefore a higher power density than conventional GaAs technology; it can also operate at higher junction temperatures and is more robust to radiation. GaN has already demonstrated the capability of delivering much higher RF output power over a wide bandwidth with excellent DC power efficiency, therefore making it ideal for SSPAs in space-bourne environments.
This activity will contribute to the development of High Power Amplifiers based on GaN technology in support to Galileo 2nd Generation activities. The EM model will allow an accurate estimation of performance that can be achieved, and shall be implemented in a configuration which is significantly representative of a future flight configuration. The targeted technology reference level of this development is TRL5/6.
Name(s): OHB, University of Rome Tor Vergata
Last Updated: 29/01/2020 10:20