An improved high-efficiency relativistic magnetron with a novel cathode endcap

Abstract

The relativistic magnetron has a series of advantages, such as high efficiency, compact structure, and tunability. In this paper, an improved modified high-efficiency relativistic magnetron with a novel cathode endcap is presented and investigated numerically. In simulation, high-power microwave of the transverse electromagnetic mode is generated with an average power of 1.56 GW, frequency of 1.593 GHz, and power efficiency of 75.8% when the voltage is 586 kV and the current is 3.59 kA. Compared with a conventional cathode endcap, the novel cathode endcap has two advantages. First, the efficiency is increased from 56.4% to 75.8%. Second, the maximum electric field is reduced from 1.4 MV/cm to 1.0 MV/cm. The simulation results verify the validity of the novel cathode endcap.