A 100 watt TWT power conditioning system

The transponder high voltage power supply for the Japanese Broadcast Satellite for Experimental Purpose (BSE) will be described. The power supply provides the appropriate voltages and currents required by a high power multi-stage depressed collector Traveling Wave Tube (TWT) with one hundred watts of RF output. The system requirements will be presented with a description of the selected design approach; the primary high voltage power circuits; high voltage component selection; high voltage packaging concept; grounding and isolation criteria; and performance characteristics including fault protection, efficiency, weight, and prototype test data.