A sort of universal theoretical analysis method for multilayer dielectric window was presented by using the mode-matching technique to build scattering matrix. The analysis of output window for high power millimeter-wave gyro-TWT was prosecuted. Based on academic analysis and numerical calculations , the primitive structure and geometric parameters of the output window had been obtained. Afterward, HFSS code is used to simulate accurately and revise approximate analysis. Through a large number of thermodynamic analysis and optimization design, the wide-band output windows of Ka-band , with average power capability 50 kW and band width about 3. 6 GHz when S11 parameters less than - 20 dB , were attained. The cold test indicates that the results of design are in agreement with the results of cold test.%首先利用场匹配理论和传输级联矩阵建立多层介质窗的普遍分析方法,对回旋行波管输出窗进行解析分析,在理论分析和数值计算的基础上得到回旋行波管宽带输出窗的结构和尺寸；然后利用三维高频分析软件HFSS进行仿真和验证.通过热分析和优化设计,在Ka波段获得了平均功率容量达到50 kW,反射系数小于-20 dB的带宽约为3.6 GHz的高性能新型宽带输出窗.冷测实验表明,冷测结果与数值计算结果较为吻合.
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