In this article, a rigorous temporal coupled-mode theory (CMT) formalism is developed, to analyze metasurface (MTS)-based structures. Such MTSs are generally rather complex, requiring extensive, full-wave simulations. To facilitate their design and minimize the associated computational demand, the CMT solves a small linear system of equations, fed by the results of certain much simpler and less time- and memory-consuming eigenvalue problems. The proposed method is versatile and offers an initial, valuable estimation of the structure’s frequency response, which may be used as a guideline for the final MTS fine tuning. As proof of concept, split-ring resonator (SRR) MTSs coupled to microstrip lines are analyzed, and their response is compared with the full-wave finite-element method (FEM) results.

中文翻译：

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通过时间耦合模式理论快速分析超表面

在本文中，开发了一种严格的时间耦合模式理论 (CMT) 形式主义，以分析基于超表面 (MTS) 的结构。这种 MTS 通常相当复杂，需要大量的全波模拟。为了促进其设计并最大限度地减少相关的计算需求，CMT 解决了一个小的线性方程组，由某些更简单、耗时更少、内存消耗更少的特征值问题的结果提供。所提出的方法是通用的，并提供了结构频率响应的初始、有价值的估计，可用作最终 MTS 微调的指南。作为概念证明，分析了耦合到微带线的裂环谐振器 (SRR) MTS，并将它们的响应与全波有限元方法 (FEM) 结果进行了比较。