Design of a Multistage Depressed Collector for ${W}$ -Band Pulsed Traveling-Wave Tubes
Design of a Multistage Depressed Collector for ${W}$ -Band Pulsed Traveling-Wave Tubes
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DOI：
10.1109/ted.2019.2931303
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发表时间：
2019-09
影响因子：
3.1
通讯作者：
Jinsheng Yang;Xiaoqing Zhang;Yinghua Du;Jun Cai;Jinjun Feng
中科院分区：
文献类型：
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作者：
Jinsheng Yang;Xiaoqing Zhang;Yinghua Du;Jun Cai;Jinjun Feng
介绍了一种基于微波管仿真工作室(MTSS)的行波管多级降压收集器的设计方法。首先，模拟了废电子束的情况，包括电子位置和速度分布。为了验证模拟的可行性和有效性，还对现有的250 W波段单级集电极脉冲行波管的输出功率、电子效率、集电极效率和总效率进行了模拟。将模拟数据与试验结果进行了比较，结果表明两者吻合较好。最后，在行波管折叠波导电路的基础上，利用收集器入口处的废束条件设计了一种四级降压式收集器。仿真结果表明，所设计的四级凹陷集电极的行波管在全频段的总效率提高了37.26%以上，最大总效率达到44.65%。与单级降压集电极相比，行波管的集电极效率和总效率分别从75%提高到88.85%和26.45%提高到44.65%。本文对高频行波管多模转换器的设计具有一定的指导意义。
This article presents a design method for multistage depressed collectors (MDCs) in ${W}$ -band traveling -wave tubes (TWTs) using microwave tube simulation studio (MTSS) code. First, the conditions of the spent electron beam, including electron position and velocity distributions, were simulated. Then, to verify the feasibility and effectiveness of the simulation, the output power, electronic efficiency, collector efficiency and overall efficiency of the existing 250-W ${W}$ -band pulsed TWT with a single-stage collector were also simulated making use of the above-spent beam conditions at the entrance of the collector. The simulated data were compared with the test results, indicating a reasonable agreement between them. Finally, the spent beam conditions at the entrance of the collector were employed to design a four-stage depressed collector, based on the folded waveguide circuit of the TWT. The simulated results showed that the overall efficiency of the TWT with the designed four-stage depressed collector increased by more than 37.26% in the whole frequency band, with the maximum overall efficiency of 44.65%. In comparison with the single-stage depressed collector, the collector efficiency and the overall efficiency of the TWT were increased from 75% to 88.85% and 26.45% to 44.65%, respectively. This article is believed to provide some guidance for the design of MDC of higher frequency band TWTs.