Design and simulation of Radial Reentrant Cavities For Ka band Vacuum Microwave Devices

Abstract

In this paper, design of a high frequency Radial Reentrant Cavity (RRC) using commercially available three-dimensional (3D) electromagnetic simulation software is reported. The eigenmode analysis of the RRC structure has been carried out and a comparative study is done with reported reentrant cavities for relevant cavity parameters. The RRC structure can be used in klystron amplifiers operating in Ka-band (27-40GHz). This structure exhibits operating frequency of 31.6 GHz and a $\boldsymbol{R}/\boldsymbol{Q}$ value of $58.3\ \mathbf{\Omega}$.