| 引用本文: | 武大鹏,舒挺,张华.Ka波段过模慢波结构色散曲线的数值求解.[J].国防科技大学学报,2015,37(2):28-31.[点击复制] |
| WU Dapeng,SHU Ting,ZHANG Hua.Numerical computation of dispersion curves in the Ka-band overmoded slow wave structure[J].Journal of National University of Defense Technology,2015,37(2):28-31[点击复制] |
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| Ka波段过模慢波结构色散曲线的数值求解 |
| 武大鹏, 舒挺, 张华 |
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(国防科技大学 光电科学与工程学院，湖南 长沙 410073)
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| 摘要: |
| 运用场匹配法，结合Ka波段过模慢波结构的实际情况，进行轴对称周期慢波结构色散关系的理论推导，得到了一种快速、准确计算适应Ka波段过模慢波结构的色散特性计算方法。根据推导结果，采用MATLAB程序编程计算了Ka波段过模盘荷波导的色散曲线。将计算得到的色散曲线与成熟的商业软件计算得到的结果进行了对比，两者误差在2%以内，验证了数值算法的可靠性。计算得到的色散曲线可以辅助选取Ka波段微波源的结构参数，对器件设计有一定参考价值。 |
| 关键词: 色散曲线 Ka波段过模慢波结构 数值计算算法 |
| DOI：10.11887/j.cn.201502007 |
| 投稿日期：2015-01-05 |
| 基金项目:国家自然科学基金资助项目（11075211） |
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| Numerical computation of dispersion curves in the Ka-band overmoded slow wave structure |
| WU Dapeng, SHU Ting, ZHANG Hua |
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(College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China)
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| Abstract: |
| Backward wave oscillator with over-mode Ka-band high power microwave (HPM) generally outputs mixed TM0n modes, it has high energy conversion efficiency, but it can′t ensure the purity of output modes. However, it is necessary for high radiation efficiency that the microwave input to the radiation terminal is certain single and pure. So it is hard to put these HPM sources into application. In order to solve this problem, a design method for compact hybrid modes converter of purifying TM0n mixed modes was proposed. With this method, the TM01, TM02 and TM03 mixed modes can be converted into pure circular waveguide TM01 mode efficiently on the condition of high power capacity and wide wave band. This method also reduces the modes purification difficulty in the design of the HPM sources. |
| Keywords: dispersion curve Ka-band overmoded slow-wave structure numerical computing method |
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