Abstract
Vane-loaded slow-wave structures (SWS) for travelling-wave tubes (TWT) have been designed using rigorous model of Kravchenko et al [1] and a recently proposed MINV (modified infinite number of vanes) model [2], Two different SWS with six, and nine vanes respectively have been optimised to give a flat dispersion characteristic over about two octaves in S-C band by varying the radial penetration and angular thickness of the vanes. The dispersion characteristics of the cold test models of the two structures have been experimentally measured using the perturbation technique over 2–7 GHz frequency range. The comparison of the results of theoretical MINV and Kravchenko's models with the experimental results indicate that a reasonable prediction of dispersion characteristics can be made with the simpler MINV model in place of using Kravchenko's model, which is based on rigorous field analysis.
Published Version
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