Title :
A 700 W 12 GHz TWT for TV Satellite Applications
Author :
Seunik, Horst ; Hanf, Fritz ; Wallander, Sven
Author_Institution :
Tubes Division, Siemens AG, Munich
Abstract :
As part of a 700 W CW transponder for a direct TV broadcasting satellite operating in the 11.7 to 12.5 GHz band, a traveling-wave tube (TWT) and directly radiating multistage collector are being developed. The state-of-the-art TWT is periodic permanent magnet (PPM) focused and incorporates a novel type of coupled cavity slow wave structure comprising three gain sections with a velocity taper in the final section for efficiency improvement. The five-stage depressed collector for further efficiency improvement is made of carbon and radiates directly into space.
Keywords :
Capacitance; Coupling circuits; Equations; Equivalent circuits; Impedance; Permanent magnets; Power supplies; Satellite broadcasting; TV broadcasting; Transponders;
Conference_Titel :
Microwave Conference, 1974. 4th European
Conference_Location :
Montreux, Switzerland
DOI :
10.1109/EUMA.1974.332011
