Q波段回旋行波管宽带高平均功率输出窗设计与热分析

利用场匹配理论建立传输级联矩阵的方法对多层窗片结构输出窗进行研究,通过大量的数值计算给出Q波段回旋行波管一种新型中间风冷结构输出窗的参数,然后通过数值计算和HFSS仿真验证,该新型输出窗在46~50GHz范围内,S11反射系数小于-20dB。在此基础上进一步对该输出窗进行热分析,热分析表明:新型输出窗窗片中心与边缘温差与传统输出窗相比大幅下降,热应力大大减小,提高了输出窗的功率容量。回旋行波管工作在TE01模式时,新型输出窗获得的最大饱和功率容量达到90kW,与传统输出窗相比,功率容量提高了21.8kW。

Design and thermal analysis of broad bandwidth and high average power output window for Q-band gyro-TWT

The theory of field-matching to build scattering matrix method was established to analyse optimization calculation for the multiple-disk output window. Through a lot of numerical calculation program design, the structure parameters of Q-band gyro-TWT double disk output window were given. Then by high frequency software HFSS simulation verification, the wide-band output windows of Q-band with band width about 4 GHz when S11 parameter is less than -20 dB were attained. Finally, on the basis of the further research, using a new method of collaborative simulation, thermal analysis of software ANSYS and HFSS was carried out on the double-disk output window to research the thermal property and power capacity of the new type output window with wind cooling. The research shows that the temperature difference of the new type output window compared with traditional output windows dropped significantly and the power capacity increased by 21.8 kW to 90 kW saturation power capacity.