论文部分内容阅读
采用等效电路方法和电磁场仿真软件Ansoft HFSS分析了折叠波导行波管的结构参数对其高频特性的影响,并在此基础上确定了Ka波段折叠波导行波管的尺寸。利用三维非线性粒子模拟软件MAGIC3D建立了两段式折叠波导行波管的模型,模拟研究了切断区长度和位置对折叠波导行波管的饱和输出功率及第2段电路单位长度增益的影响。最后设计了一个工作于33～36GHz的两段式折叠波导行波管,其输出功率的波动小于1dB,最大连续波输出功率达670W,对应电子效率高达7.55%。
The equivalent circuit method and electromagnetic field simulation software Ansoft HFSS were used to analyze the influence of structural parameters of the folded waveguide TWT on its high frequency characteristics. On the basis of this, the size of folded waveguide TWT in Ka band was determined. A three-dimensional nonlinear particle simulation software MAGIC3D was used to establish the model of two-stage folded waveguide TWT. The influence of the length and location of the cutoff on the saturated output power and the gain per unit length of the folded TWT was investigated. Finally, a two-stage folded waveguide traveling wave tube operating at 33-36GHz is designed. The output power fluctuation is less than 1dB, the maximum continuous wave output power is 670W, and the corresponding electron efficiency is as high as 7.55%.