TY - JOUR AU - Ashok Bansiwal AU - Sushil Raina AU - K. J. Vinoy AU - Subrata Datta PY - 2021/05/17 Y2 - 2024/03/28 TI - Effect of Beam tunnels on Resonant Frequency of Cylindrical Reentrant Cavity JF - Defence Science Journal JA - DSJ VL - 71 IS - 03 SE - Special Issue on Vacuum Electronic Devices and Applications DO - 10.14429/dsj.71.16814 UR - https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/16814 AB - Analytical formulations for the resonant frequency of a reentrant cavity for klystron are available in the literature only for such cavities having a single beam-tunnel. An improved analytical formulation has been proposed in this paper for the calculation of cavity gap-capacitance of reentrant cavities having single and multiple beam-tunnels and its effects on the resonant frequency are studied. The results obtained through analysis have been validated against those obtained from the 3D electromagnetic field simulations and measurements. The proposed analytical formulation provides good estimation of resonant frequency of cavity with single and multiple beam-tunnels. ER -