Ka波段高功率回旋行波管输出窗的优化设计和功率容量的研究

Design Optimization of Output Window for High Power Ka-Band Gyro-Traveling Wave Tube and Its Power Capacity

利用场匹配理论建立传输级联矩阵的方法对高功率Ka波段双窗片结构输出窗进行分析优化计算,再通过高频电磁软件HFSS进行验证,设计出了相对带宽大于11%的双层窗片输出窗。用HFSS与有限元分析软件ANSYS协同仿真的新方法对双窗片输出结构进行热分析,研究了Ka波段回旋行波管工作模式分别为TE01和TE11两种不同模式时双窗片结构输出窗在不同频点的功率容量。研究表明:工作模式为TE01时输出窗片的功率容量比工作在TE11模式下大约高8 k W。

The characteristics of the output window of the high power Ka-band gyro-traveling wave tube（ TWT） was empirically approximated,mathematically modeled,theoretically analyzed in terms of the scattering matrix formulated in field-matching theory,and numerically simulated and tested with software HFSS for the design optimization of its structure. The impact of the high frequency and operation modes of TE01 and TE11on the output power capacity of the newly-designed double-disk sapphire output window,with relative band width of over 11%,was investigated in simulation via a combination of software ANSYS and HFSS. The simulated results show that when it comes to the critical dissipation power capacity through the novel double-disk sapphire output window,the TE01 mode outperforms the TE11 mode with a higher output power of over 8 k W.