Simulation Of A Pill-Box Rf-Window With Conical-Shaped-Ceramic

Abstract Microwave vacuum electron devices are the key components in Radar, communication, broadcasting, accelerators and the other electron systems. RF-windows are the key parts in high-power microwave electron vacuum devices, which have great influence on the frequency bandwidth, power level, reliability and lifetime of the devices. In this paper, based on a pill-box window model with a conical-shaped alumina ceramic and Ansoft HFSS software, the relation of VSWR with various electrical parameters in the window is simulated; the effects of variations of the output window structure on electrical field intensity, microwave power flow and quantity of heat are analyzed; the electrical characteristics of frequency bandwidth, power capability and heat dissipation for the pill-box window with conical-shaped or disk alumina ceramic are discussed, which shows that, with a rational structure of the window with conical-shaped alumina ceramic, the output capability of microwave peak and average power may greatly be increased, the secondary electron emission may effectively be suppressed, and heat dissipation may become more uniform and be easier for cooling. It is important for the engineering design of high power microwave output windows.