360 GHz返波管的研究

Study of a 360 GHz Backward Wave Oscillator

对采用齿状光栅结构的慢波电路进行了研究,该结构在电子束与光栅表面接近的情况下有一定的通过率。在求得最大耦合阻抗条件下,设计了一种工作在360 GHz的返波管,通过对互作用电路的耦合阻抗的分析,可以减小亚毫米波及太赫兹真空电子学辐射源对阴极发射电流密度的要求。当工作电压为19.5 kV,工作电流75 mA时,PIC模拟结果得到了8 W的平均功率输出,考虑阴极为脉冲工作时,该器件在360 GHz可以得到4 mW的平均功率输出。

This paper studies a new kind of metal grating which enables the passing rate when electron beam skip over the metal grating.The coupled impedance of the first negative space harmonic is optimized and proposed a backward wave oscillator operating at 360 GHz.PIC simulation shows with 19.5 kV and 75 mA beam,the average pulse power of 8 W is obtained at 360 GHz which shows it＇s a potential candidate as the compact,broadband and tunable radiation sources in the millimeter and submillimeter frequency range.