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The fabrication of multi-stage depressed collector for space TWTs involve several complexities due to the stringent space constraints imposed. Few common problems encountered are: (1) high voltage breakdown problems; (2) large size; (3) bulkier; (4) long fabrication time. In order to counteract these problems, single-ceramic technology has been used in the fabrication of the collector. Due to this,...
A novel geometry of a multi-stage depressed collector with four stages has been designed for Ka-band space traveling wave tube. The inner structure of each electrode of the collector has been provided with a single-step corrugation of a positive slope followed by a negative slope. The performed simulation predicts that the proposed collector has 7 % more efficiency, less back streaming of electrons...
Multi-stage depressed collector plays a major role in determining the overall efficiency of high efficiency space TWTs particularly for space applications. This paper presents the dependency of collector efficiency on the radial dimensions of the multi-stage depressed collector. In addition, an approach to reduce the radial dimensions of the collector without significantly compromising the collector...
Traveling-wave tubes (TWTs), used in civil and defence applications, require high power and multi-octave bandwidth rather than high efficiency and hence just a single stage depressed collector is sufficient. However, TWT used in space applications necessarily has to have very high efficiency rather than wide bandwidth. A user friendly multi-stage depressed (MDC) collector design code in MATLAB for...
Non-conventional 3-stage collector geometry has been designed using EGUN code for high efficiency applications deviating from typical 4-stage depressed collector. Efficiency of this collector is very much similar to 4-stage collector with reduced dimensions, weight, etc, which are very important if such collector is to be used for space applications. Such collector also reduces the complexity of electronic...
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