W波段回旋速调管输入耦合器的优化设计

Optimization Design of the Input Coupler for W-band Gyroklystron

该文对应用于W波段TE01模回旋速调管的输入耦合器进行了理论分析,初步得到了输入耦合器的结构尺寸,利用3维电磁模拟软件CST,HFSS与FEKO对其进行了仿真与优化。研究了耦合孔长、宽和圆柱腔半径对耦合器谐振频率及Q值的影响,并对耦合器内腔工作模式的纯度进行了计算。结果表明,在W波段该耦合器能够激励起TE01模,谐振频率为93.55 GHz,外观品质因数为145,耦合器内腔工作模式纯度达到99%,满足设计要求。

In this paper, an input coupler of W-band TE01 mode gyroklystron is designed. Structure dimensions of the input coupler are obtained through the theory analysis. Results from 3-D electromagnetic simulation software CST, HFSS and FEKO are applied to its verification and optimization. The effects on the coupling frequency and quality factor from some dimensions, including dimensions of the apertures and the radius of the cylindrical cavity, are also researched. Besides, the mode purity in the cylindrical cavity is calculated. The results show that the TE01 mode is obtained in the cylindrical cavity, with the coupling frequency of 93.55 GHz, external quality factor of 145, and the mode purity of 99%.