Cavity simulation of W-band plane linear arrangement multi-beam distributed interaction klystron

The five-gap cavity of the W-band plane linear arrangement multi-beam distributed interaction klystron was physically approximated, appropriately modeled, and numerically simulated with the 3-dimension software package CST-MSW. The influence of the cavity configuration on the cold parameters, such as the electric field distribution and the characteristic impedance, was evaluated. Compared with the conventional, dumbbell-shaped five-gap cavity of the sheet beam distributed int eraction klystron operating at the same frequency, the five-gap cavity of the pane linear arrangement multi-beam distributed interaction klystron was found to have more stable structure, higher effective R/Q, and fewer non-operational modes in a certain frequency range.