金属线上表面波的相互作用
Interaction between Surface Waves on Wire Lines
摘要：
本文研究了平行导线上表面波之间的耦合特性。基于有限元法（FEM）和分析模型的单线索末菲和Goubau线。从索末菲型波出发，假定两线表面波是两条线上表面波的叠加，导出了解析表达式。模型通过测量和分析和有限元计算耦合索末菲型线之间进行比较研究进行验证。然后，我们研究了两个Goubau线之间的耦合与有限元模型。测量和计算显示出显著的一致性。基于FEM的模型和分析模型也非常匹配。结果显示出对表面波在多导体上传播的有利影响的新性质。耦合线的短程行为，从而存在一个最佳的耦合线的分离，是本文最重要的发现之一。我们评论我们的结果的相关性，特别是在高带宽的需求和immersed交叉耦合效应的应用程序。
英文摘要：
This paper investigates the coupling properties between surface waves on parallel wires. Finite Element Method (FEM) based and analytical models are developed for both single wire Sommerfeld and Goubau lines. Starting with the Sommerfeld type wave, we derive the analytical expression based on the assumption that the two-wire surface wave is a superposition of the two surface waves on the individual wires. Models are validated via measurements and a comparison study conducted between the analytic and the FEM-based computations for coupled Sommerfeld type lines. We then investigate the coupling between two Goubau lines with the FEM model. The measurement and calculations show remarkable agreement. The FEM-based and the analytical models match remarkably well too. The results exhibit new properties of favourable effects on 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 especially in relation to applications of high bandwidth demands and immanent cross-coupling effects.
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