3mm回旋行波管高频窗的设计

利用等效电路理论和网络传输矩阵理论设计出了可承受平均功率10kW以上的3mm回旋行波管的输入输出窗。并用三维高频结构仿真软件HFSS和CST-MW S模拟结果与数值计算结果进行了比较,三者吻合得很好。在W波段驻波系数小于1.2的情况下,得到盒型窗输出带宽12.4GHz(13.2%);三层介质矩形窗输出带宽为18.8GHz(20%)。本文所推导的理论结果可直接运用于更高频段高频窗的设计中。

Design for High-frequency Millimeter-Wave Window of a 3mm Gyrotron Traveling-Wave Tube

A high-frequency millimeter-wave window,which applied to the 3mm gyrotron Traveling Wave Tubes and is capable of passing average power outputs of more than 10kW,was designed by using microwave equivalent circuit and transfer matrix.Three-dimensional simulation software HFSS and CST-MWS were used to simulate and investigate it.The simulation results agreed with each other very well.The results show that,when VSWR<1.2 in the W-band,the pillbox window's bandwidth can reach about 12.4GHz,and it reaches about 18.8GHz for the three-layer ceramic material rectangle wave-guide window.The ideas and the theory can be easily applied to those in higher frequency.