Vishal Kesari

TL;DR: In this article, the shape of dispersion characteristics in a variant of disc-loaded circular waveguide was studied through electromagnetic analysis for assessing the structure for wideband coalescence of the beam- and waveguide-mode dispersion characteristic that entails the wideband gyro-travelling-wave tube (gyro-TWT) performance.

TL;DR: In this paper, a circular waveguide with chiral dielectric lining was analyzed for hybrid mode dispersion relation and a numerical computer code was developed to solve the hybrid-mode dispersion relationship and the solutions were plotted to explore the dispersion characteristics and shaping with the change of material and geometry parameters of the structure.

TL;DR: In this paper, a waveguide structure, which includes a downtaper, a straight-midsection, and an uptaper waveguide sections with two parabolic-corrections at transitions of waveguide segments along with a raised cosine nonlinear taper, was considered as an interaction structure for the gyrotron.

TL;DR: In this paper, a disc-loaded circular waveguide interaction structure of a gyro-TWT taking into account the space harmonic effects arising from the axial periodicity of the annular discs was studied.

TL;DR: In this article, a Denisov-type mode launcher having a dimpled-wall tapered waveguide and a helical cut was combined with a set of four synthesized toroidal mirrors to design a converter for TE6,2 cavity mode to TEM0,0 Gaussian mode for a transverse output millimeter-wave gyrotron.