Input cavity characteristics with a two-beam loading are one of the most important scientific problems for using a two-beam scheme to develop compact, high-power millimeter-wave klystrons. This article focuses on this problem with a 400 kW two-beam loading in an overmoded input cavity which is proposed to develop a Ka-band klystron with peak power toward 150–200 kW. The input cavity exploits TM13 mode to support two equivalent sections of field gaps for modulating two beams. The beam loading parameters, such as ${P}_{t}$ , and ${Q}_{b}$ , and cavity parameters, such as electric field distribution, frequency ( ${f}$ ), and cavity ${Q}_{l}$ without beams can be optimized and selected to achieve matching absorption by two beams with a certain RF power injection in the Ka-band. The CST Studio Suite (CST) simulation results show that over 99% power of the input signal around 35 GHz can be absorbed by the input cavity loaded by two beams with ${P}_{t}$ of 0.473– $0.716~\mu \text{P}$ . Constant ${P}_{t}$ exercises about the same degree of two-beam loading on the input cavity.

中文翻译：

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研究用于开发紧凑和高功率 Ka 波段速调管的两束加载输入腔特性,研究用于开发紧凑和高功率 Ka 波段速调管的两束加载输入腔特性

双光束加载的输入腔特性是使用双光束方案开发紧凑、高功率毫米波速调管的最重要的科学问题之一。本文重点研究了在过模输入腔中加载 400 kW 双光束的问题，建议开发峰值功率接近 150-200 kW 的 Ka 波段速调管。输入腔利用 TM13 模式来支持两个等效的场间隙部分来调制两个光束。梁加载参数，如 ${P}_{t}$ ， 和 ${Q}_{b}$ , 和腔体参数，如电场分布、频率 ( ${f}$ ) 和空腔 ${Q}_{l}$可以优化和选择无光束，以实现在 Ka 波段具有一定射频功率注入的两个光束的匹配吸收。CST Studio Suite (CST) 仿真结果表明，35 GHz 附近的输入信号中超过 99% 的功率可以被两个光束加载的输入腔吸收 ${P}_{t}$0.473– $0.716~\mu \text{P}$ . 持续的 ${P}_{t}$在输入腔上练习大约相同程度的双光束负载。,双光束加载的输入腔特性是使用双光束方案开发紧凑、高功率毫米波速调管的最重要的科学问题之一。本文重点研究了在过模输入腔中加载 400 kW 双光束的问题，建议开发峰值功率接近 150-200 kW 的 Ka 波段速调管。输入腔利用 TM13 模式来支持两个等效的场间隙部分来调制两个光束。梁加载参数，如 ${P}_{t}$ ， 和 ${Q}_{b}$ , 和腔体参数，如电场分布、频率 ( ${f}$ ) 和空腔 ${Q}_{l}$可以优化和选择无光束，以实现在 Ka 波段具有一定射频功率注入的两个光束的匹配吸收。CST Studio Suite (CST) 仿真结果表明，35 GHz 附近的输入信号中超过 99% 的功率可以被两个光束加载的输入腔吸收 ${P}_{t}$0.473– $0.716~\mu \text{P}$ . 持续的 ${P}_{t}$在输入腔上练习大约相同程度的双光束负载。