介绍了准光腔型虚阴极振荡器.利用光学谐振腔标量波动理论,分析了准光学谐振腔的腔场特性;并采用二维半全电磁PIC程序对器件进行了粒子模拟,得到了主频为7.0GHz、平均功率超过1.3GW、以准高斯模为主的微波输出,束波作用平均转换效率接近10%.

The paper introduces a virtual cathode oscillator (vircator) with quasi-optical resonator. The resonator offers self-consistent feedback and mode-choosing mechanisms. It serves the purpose of enhancing the transform efficiency, shortening the saturated time and achieving both stable frequency and narrow bandwidth. The property of the system is analyzed by means of the scalar wave theory. Results of 2.5-D numerical simulation of the device are presented. A powerful microwave with quasi-Gauss mode which is apt to focus and radiate is obtained at 7.0GHz, the time average output power overtakes 1.3GW, and the average efficiency approximates to 10%. The simulation confirms the conclusion of the theoretic analysis.