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线路表面波之间的相互作用。

Interaction between surface waves on wire lines.

作者信息

Molnar Daniel, Schaich Tobias, Al-Rawi Anas, Payne Mike

机构信息

Theory of Condensed Matter Group, Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, UK.

BT Labs, Adastral Park, Martlesham Heath, IP5 3RE Ipswich, UK.

出版信息

Proc Math Phys Eng Sci. 2021 Feb;477(2246):20200795. doi: 10.1098/rspa.2020.0795. Epub 2021 Feb 17.

DOI:10.1098/rspa.2020.0795
PMID:35153544
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8317981/
Abstract

This paper investigates coupling between electromagnetic surface waves on parallel wires. Finite-element method (FEM)-based and analytic models are developed for single- and double-wire Sommerfeld and Goubau lines. Models are validated via measurements for Goubau lines and a comparison between the analytic and the FEM-based computations for coupled Sommerfeld- and Goubau-type lines is carried out. The measurements and calculations show remarkable agreement. The FEM-based and analytic models match remarkably well too. The results exhibit new favourable effects for surface waves propagation over multiple conductors. The short-range behaviour of the coupled wires and, consequently, the existence of an optimum separation of coupled wires is one of the most significant findings of this paper. We comment on the relevance of our results, particularly in relation to applications of high bandwidth demands and cross-coupling effects.

摘要

本文研究平行导线上电磁表面波之间的耦合。针对单线和双线索末菲线及古鲍线，开发了基于有限元法（FEM）的模型和解析模型。通过对古鲍线的测量对模型进行了验证，并对耦合索末菲型线和古鲍型线的解析计算与基于有限元法的计算进行了比较。测量和计算结果显示出显著的一致性。基于有限元法的模型和解析模型也非常吻合。结果展示了表面波在多根导体上传播的新的有利效应。耦合导线的短程行为以及由此导致的耦合导线存在最佳间距，是本文最重要的发现之一。我们对研究结果的相关性进行了评论，特别是与高带宽需求应用和交叉耦合效应相关的方面。

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本文引用的文献

1
Subwavelength metallic waveguides as a tool for extreme confinement of THz surface waves.亚波长金属波导作为太赫兹表面波极限限制的工具。
Sci Rep. 2013;3:1369. doi: 10.1038/srep01369.
2
THz surface plasmon modes on planar Goubau lines.平面戈巴线上的太赫兹表面等离子体激元模式。
Opt Express. 2012 Apr 9;20(8):8466-71. doi: 10.1364/OE.20.008466.
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Metal wires for terahertz wave guiding.用于太赫兹波导的金属线。
Nature. 2004 Nov 18;432(7015):376-9. doi: 10.1038/nature03040.
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Mimicking surface plasmons with structured surfaces.用结构化表面模拟表面等离子体激元。
Science. 2004 Aug 6;305(5685):847-8. doi: 10.1126/science.1098999. Epub 2004 Jul 8.