Analysis of the Dual Side-Coupled RF Cavities for the HPM Devices—An Equivalent Circuit Approach

Abstract

An equivalent circuit analysis was carried out for the dual side-coupled cavities (DSCCs) suitable as RF interaction structure in the high power microwave (HPM) devices and linear accelerators. Considering lossless structure, its equivalent shunt capacitance per unit length and series inductance per unit length are determined for the TM₀₁ mode operation. These equivalent circuit parameters were used to calculate the phase velocity and characteristic impedance of the DSCC. This was utilized further to appreciate the dispersion behavior of the DSCC. The developed analysis was also validated through electromagnetic simulations.