Design Limitations and Experimental Results of High Power CW PPM-Focused TWT´s from 30 to 50 GHz

For mobile millimeter wave satellite communications terminals two types of TWT have been developed: A Ka band tube with an output power exceeding 1 kW in the band 36.7 to 38.2 GHz (1) and a Q band (40 to 50 GHz) TWT with an output power of more than 400 W (2). Additionally a 30 GHz 1 kW TWT is presently being developed under contract to the German Space Administration.