This letter presents the design of an overmoded X-band RF window for use in high-power microwave tubes, such as klystron, magnetron, and linear accelerator (LINAC). The cylindrical section of the window containing dielectric barrier operates in the TE022 mode. Conversion from TE10 mode to TE022 mode is achieved using four rectangular slots made on the narrow walls of the rectangular waveguide sections. The simulation results for the proposed design in CST and HFSS are in good agreement. The return loss, insertion loss, and bandwidth are obtained as 52.76 dB, 0.06 dB, and 41.4 MHz, respectively, at 9.3 GHz. Coupled electromagnetic, thermal, and structural simulations are performed to study the multiphysics performance of the RF window. The multipactor analysis is carried out in SPARK3D to determine the multipactor threshold. The proposed TE022 mode RF window can operate safely at a 20.75 MW of peak power.

中文翻译：

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TE022 模式高功率 X 波段射频窗口的多物理场和多因子分析


这封信介绍了用于高功率微波管（例如速调管、磁控管和直线加速器 (LINAC)）的过调制 X 波段射频窗口的设计。包含介电屏障的窗口的圆柱形部分在 TE022 模式下工作。从 TE10 模式到 TE022 模式的转换是通过在矩形波导部分的窄壁上制作的四个矩形槽实现的。 CST 和 HFSS 中所提出的设计的仿真结果非常一致。在 9.3 GHz 时，回波损耗、插入损耗和带宽分别为 52.76 dB、0.06 dB 和 41.4 MHz。通过执行耦合电磁、热和结构仿真来研究射频窗口的多物理场性能。在 SPARK3D 中进行多重因子分析以确定多重因子阈值。拟议的 TE022 模式射频窗口可以在 20.75 MW 峰值功率下安全运行。