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A Ku-band 140 W space TWT of gain (>55 dB), electronic efficiency (>24%), collector efficiency (>75%), overall efficiency (>55%), I/M components (<-12 dBc) for frequency 10.9-11.7 GHz has been designed and developed for satellite communication system. This paper presents critical design issues and approach related to different assemblies like electron gun, PPM focusing, helix SWS, input...
A high efficiency 140W radiation-cooled Ku-band TWT has been designed successfully for communication satellite. This TWT with input coaxial coupler and output waveguide coupler was designed in 2-sections to achieve gain >55dB at MOW output power over the frequency range of 10.9-11.7GHz with high stability and high linearity.
In this paper, authors have presented experimental results for two TWTs, developed for satellite communication. Both the TWTs have four-stage depressed collectors and delivering 60 W CW power in C-band. The results have been presented by varying the control anode potential and keeping the other voltages constant
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