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IJRSP Vol.37(2) [April 2008] >

Title: Analysis of a coupled-cavity slow wave structure for a TWT
Authors: Alaria, M K
Srivastava, V
Keywords: Dispersion
Coupled-cavity slow-wave structures (CC-SWS)
Traveling wave tube
Staggered structure
Coupling slots
Issue Date: Apr-2008
Publisher: CSIR
Abstract: This paper describes an approach of designing a coupled-cavity slow wave structure (CC-SWS) for a high power traveling wave tube (TWT) using HFSS code, which is a 3-D high frequency electromagnetic simulator. The criteria of deciding the initial design parameters of a cavity are first discussed. Method of computing the dispersion and impedance characteristics of the CC-SWS has been discussed. Analysis was carried out for single and double-slot CC-SWS with coupling slots. Mesh size was optimized for speed and maximum accuracy. The CPU time on Pentium-4, 2.66 GHz system with 1 GB RAM was less then 25 min for three or four cavities. Results of HFSS are matched with the experimental results for a C-band coupled cavity SWS and also compared with the results of analytical method.
Page(s): 139-142
ISSN: 0367-8393
Source:IJRSP Vol.37(2) [April 2008]

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