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利用叉指和超形状几何结构设计具有高角度和极化稳定性的频率选择表面。

Utilizing interdigital and supershape geometries for the design of frequency selective surfaces with high angular and polarization stabilities.

作者信息

Khajevandi Amir, Oraizi Homayoon

机构信息

School of Electrical Engineering, Iran University of Science and Technology, Tehran, 1684613114, Iran.

出版信息

Sci Rep. 2022 Apr 29;12(1):7054. doi: 10.1038/s41598-022-10960-z.

DOI:10.1038/s41598-022-10960-z
PMID:35487952
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9054826/
Abstract

In this research article, the superformula is used to design the geometry of a frequency selective surface (FSS) unit cell, which resembles the shapes found in nature. The designed shape of unit cell is like petals, which may take different form by varying the values of six parameters. The proposed FSS unit cell has both angular and polarization stabilities of incident wave. For the miniaturization of FSS and decrease of resonance frequency, interdigital capacitances (IDCs) are devised in the FSS structure, which do not deteriorate angular and polarization stabilities. The dimensions of the unit cell are 10 mm × 10 mm and the resonance frequency is specified as 3.5 GHz. An equivalent circuit is derived for the unit cell to evaluate its frequency responses. Its performance as the transmission coefficient is obtained by the equivalent circuit and full-wave simulation. The effects of variations of the geometrical dimensions of the FSS unit cell on its performance are studied. A prototype model of proposed FSS is fabricated and measured. The performance of its equivalent circuit, full-wave computer simulation results and measured data are compared and are shown to be in good agreement.

摘要

在这篇研究文章中，超公式被用于设计频率选择表面（FSS）单元结构的几何形状，该形状类似于自然界中发现的形状。所设计的单元结构形状类似花瓣，通过改变六个参数的值可能呈现不同的形式。所提出的FSS单元结构对入射波具有角度和极化稳定性。为了实现FSS的小型化并降低共振频率，在FSS结构中设计了叉指电容（IDC），这不会降低角度和极化稳定性。单元结构的尺寸为10毫米×10毫米，共振频率指定为3.5吉赫兹。推导出单元结构的等效电路以评估其频率响应。通过等效电路和全波模拟获得其作为传输系数的性能。研究了FSS单元结构几何尺寸变化对其性能的影响。制作并测量了所提出的FSS的原型模型。比较了其等效电路的性能、全波计算机模拟结果和测量数据，结果显示吻合良好。

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A Fully Phase-Modulated Metasurface as An Energy-Controllable Circular Polarization Router.一种作为能量可控圆偏振路由器的全相位调制超表面。
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