Maintenance of the DC-RF Conversion Efficiency during the Variation of the Power Generation for Solar Power Satellite

Abstract

  In Tethered solar power satellite on GEO, changes in the angle of the sunlight cause changes in the amount of power generated by solar cells. These variations result in changes in the DC-RF conversion efficiency of RF power amplifiers. This variation of the DC-RF conversion efficiency has been estimated in a previous study by using prototypes of the RF amplifiers. This estimated variation of the DC-RF conversion efficiency must be suppressed. This paper reports a new method to maintain high power efficiency during the variation of the power supply by applying the pulse modulation for RF amplifier.