Abstract
Travelling Wave Tube Amplifiers (TWTA) provide the high RF output power for a downlink of a satellite transponder. A Microwave Power Module (MPM) additionally consists of an adjustable channel amplifier to drive the TWTA. State-of-the-art MPMs for Satcom are capable of generating an RF output power of about 150 W in Ku-Band and about 130 W in Ka-Band. To increase the RF output power of satellite transponder is one way to react on the trend towards higher data rates, better signal-to-noise ratios and smaller ground stations. This paper shows the latest results of development projects and presents an overview on current qualification campaigns of High-Power MPMs within Tesat-Spacecom. Furthermore, additional key features of the High-Power MPMs are discussed. The saturated RF output power can be adjusted by telecommand and therefore individually adapted to satellite transponder needs by using the FLEX functionality. The implementation of a serial TM/TC interface following the industrial standard CAN is presented. This standardized serial bus helps to reduce the amount of harness and therefore payload mass; and to reduce the amount of equipment variants.
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