Analysis of Coupled Space Harmonics in Millimeter-Wave Overmoded Corrugated Structures with Finite and Infinite Length

2020 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2020-12-06 DOI:10.1109/ICOPS37625.2020.9717355

Liangjie Bi, L. Meng, Yong Yin, A. Andreev, A. Elfrgani, E. Schamiloglu

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Abstract

The coupled space harmonics in a millimeter-wave overmoded corrugated structure with finite- and infinite-length are analyzed. For a comprehensive physics analysis, the electromagnetic modes constructing the coupled space harmonics are studied using simulated two- and three-dimensional field patterns in corrugated and smooth-walled structures with finite length based on electric and magnetic boundary conditions. Simulation results show that specific stopbands will emerge at all of the intersections between the dispersion curves of different TM0n, modes when considering infinite-length structures with corrugations. The number of split coupled harmonics with finite length will be increased. The dispersion relations of finite length structures are thus regrouped according to the stopbands and become the same shape as that of the infinite structure which is derived analytically. This provides a significant basis to clarify the electromagnetic characteristics for transferring the dispersion relations of finite length structures into infinite structures.

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有限和无限长毫米波超模波纹结构的耦合空间谐波分析

分析了有限长和无限长毫米波超模波纹结构的耦合空间谐波。为了进行全面的物理分析，基于电和磁边界条件，利用模拟二维和三维场图，研究了有限长度波纹和光滑壁结构中构成耦合空间谐波的电磁模式。仿真结果表明，当考虑具有波纹的无限长结构时，在不同模态色散曲线的所有交叉处都会出现特定的阻带。有限长度的分裂耦合谐波数量将会增加。因此，有限长度结构的色散关系根据阻带重新组合，并与解析导出的无限长度结构的色散关系相同。这为将有限长度结构的色散关系转化为无限长度结构提供了明确电磁特性的重要依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2020 IEEE International Conference on Plasma Science (ICOPS)

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