论文标题
一个离散的基于傅立叶变换的框架，用于分析和合成圆柱形欧米茄 - 双异构性元面的框架
A Discrete Fourier Transform-Based Framework for Analysis and Synthesis of Cylindrical Omega-bianisotropic Metasurfaces
论文作者
论文摘要
本文介绍了一个框架，用于分析和设计圆柱形欧米茄 - 双异型元素，灵感来自模式匹配和数字信号处理技术。使用离散的傅立叶变换，我们将电磁场分布分配到正交圆柱模式中，并将方位角变化的跨表面成分参数转换为各自的光谱。然后，通过调用适当的边界条件，我们建立了代数方程的系统，可以重新排列，以预测预定的元图的散射场，或者合成支持任意规定的现场变换的元图。提出的框架有助于对满足当地功率保护的现场分布的有效评估，这是被动和无损标量跨面带来的关键困难之一。它代表了一个有希望的解决方案，可以规定在许多最先进的基于跨表交的设备中，对活动组件，受控功率耗散或张力表面极化的需求。为了证明所提出的技术的鲁棒性和多功能性，我们设计了用于不同应用的几种设备，并使用有限元模拟对它们进行数值验证。
This paper presents a framework for analyzing and designing cylindrical omega-bianisotropic metasurfaces, inspired by mode matching and digital signal processing techniques. Using the discrete Fourier transform, we decompose the the electromagnetic field distributions into orthogonal cylindrical modes and convert the azimuthally varying metasurface constituent parameters into their respective spectra. Then, by invoking appropriate boundary conditions, we set up systems of algebraic equations which can be rearranged to either predict the scattered fields of prespecified metasurfaces, or to synthesize metasurfaces which support arbitrarily stipulated field transformations. The proposed framework facilitates the efficient evaluation of field distributions that satisfy local power conservation, which is one of the key difficulties involved with the design of passive and lossless scalar metasurfaces. It represents a promising solution to circumvent the need for active components, controlled power dissipation, or tensorial surface polarizabilities in many state-of-the art conformal metasurface-based devices. To demonstrate the robustness and the versatility of the proposed technique, we design several devices intended for different applications and numerically verify them using finite element simulations.
