| 345 GHz折叠波导行波管中电磁传输损耗的分析计算 |
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| 引用本文： | 张芳,董志伟,杨温渊,董烨.345 GHz折叠波导行波管中电磁传输损耗的分析计算[J].强激光与粒子束,2014,26(4):043101. |
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| 作者姓名： | 张芳 董志伟 杨温渊 董烨 |
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| 作者单位： | 1.北京应用物理与计算数学研究所, 北京 1 00094; |
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| 基金项目： | 中国工程物理研究院太赫兹科学技术研究中心项目(T2013-04-08); 国家高技术发展计划项目 |
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| 摘 要： | 利用电导率等效方法对345GHz折叠波导行波管中的电磁信号的传输损耗进行了仿真研究,考察了流通管孔径、加工粗糙度等对冷腔传输损耗的影响。结果表明,流通管孔径较大或加工粗糙度较大都会导致电磁信号传输严重衰减。模拟分析了热腔中电磁信号衰减对慢波结构净增益、带宽、最佳周期数等器件特征参数的影响,结果显示,电磁信号衰减会使得增益下降和带宽降低。
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| 关 键 词： | 太赫兹 折叠波导行波管 粗糙度 电导率 传输损耗 |
| 收稿时间： | 2013/6/19 |
Electromagnetic field’s transmission attenuation in 345 GHz folded waveguide traveling-wave tube |
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| Institution: | 1.Institute of Applied Physics and Computational Mathematics,Beijing 100094,China;2.Terahertz Research Center,CAEP,Mianyang 621900,China |
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| Abstract: | The equivalent-conductivity method is applied to the simulation work of electromagnetic transmission attenuation for 345 GHz FWG-TWT(folded waveguide traveling-wave tube). The paper studies the cold model of slow-wave structure and does research on the big factors which influence transmission attenuation, such as the beam tunnels diameter, processing roughness. A big beam tunnel or a large roughness will result in serious electromagnetic attenuation. The paper also studies the hot model of slow-wave structure, and analyzes the effects of electromagnetic attenuation on gain, bandwidth, best length of slow wave structure. Results show that electromagnetic attenuation causes gain reduction and bandwidth decreases. |
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| Keywords: | terahertz FWG-TWT roughness metal conductivity transmission attenuation |
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