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This article describes the development and alignment of multi-stage depressed collector which is used in TWT application by using Twymann-Green Interferometry technique. A unique methodological approach is used to develop a better efficient system design layout for the alignment process for an assembly of MSD collectors. In view demand of a high power and high efficiency traveling wave tubes for space...
This paper presents the optimum selection of helix tape parameters for the design of Ku-band 140 W short length TWT for space communication application. CST MWS code and in-house developed SUNRAY-3D codes have been used to design helical slow wave structure. In this model, helix is considered as perfectly conducting tape. The dependency of gain flatness and gain per unit length on tape thickness,...
Improper fitting of helix bundle to rod and rod to barren envelope leads to high thermal resistances and hence restricts average power handling capability of a TWT. In this paper, authors have calculated thermal resistances at different joints of a helix traveling-wave tube (TWT), analytically and validated with COSMOS software.
Ku-band 140W short-length space TWT has been designed for two different beam parameters. Design-I was carried out at beam voltage/current 5.9kV/100mA for gain (>25dB) and electronic efficiency (>25%). Design-II was done at beam voltage/current 4.4kV/188mA for high gain (>50dB) and efficiency (>17%). Higher-order harmonics and inter-modulation (I/M) components for both designs were analyzed...
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