S波段宽带大功率连续波耦合腔行波管3维模拟设计
Three-dimensional simulation of a broadband high-power CW S-band coupled-cavity traveling-wave tube
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摘要: 使用3维PIC粒子模拟软件定量分析了耦合腔行波管的大信号注波互作用行为。使用完整的仿真模型完成了S波段连续波管型的设计，达到如下设计指标：工作频率2.0~2.3 GHz，输出功率4.3 kW，频带内增益波动±0.7 dB。提出了使用大介电常数微扰介质棒减小耦合阻抗计算误差的方法，研究了行波管的冷腔特性，给出了色散、耦合阻抗等参数。Abstract: Quantitative analysis of the large-signal beam-wave interaction of coupled-cavity traveling-wave tube (TWT) is performed using three-dimensional PIC code. With an integrated model, an S-band CW coupled-cavity TWT is designed. The design parameters of this tube are：operating frequency from 2.0 GHz to 2.3 GHz，output power 4.3 kW，gain fluctuation ±0.7 dB. In order to reduce the computing error of interaction impedance, a method using perturbation dielectric rod with big dielectric constant is proposed. Cold cavity characteristic of coupled-cavity TWT is also studied and the simulation results of dispersion and interaction impedance are given.
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Key words:
- coupled-cavity twt /
- cw /
- three-dimensional simulation /
- pic simulation /
- cold cavity characteristic
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