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用于微波应用的多频带圆极化选择超表面

A multiband circular polarization selective metasurface for microwave applications.

机构信息

Research Institute for Microwave and Millimeter-Wave Studies (RIMMS), National University of Sciences and Technology (NUST), Islamabad, 44000, Pakistan.

School of Electronic Engineering and Computer Science, Queen Mary University of London, London, E1 4NS, UK.

出版信息

Sci Rep. 2021 Jan 19;11(1):1774. doi: 10.1038/s41598-021-81435-w.

DOI:10.1038/s41598-021-81435-w
PMID:33469095
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7815798/
Abstract

In this research article, a multiband circular polarization selective (CPS) metasurface is presented. A reciprocal bi-layered metasurface is designed by introducing the chirality in the structure. The top layer of the proposed metasurface is composed of circular split-ring resonator with a cross shape structure inside it. The same structure is printed on the bottom side of the proposed metasurface by rotating it at an angle of 90° to achieve chirality in the structure. The proposed metasurface is able to add CPS surface capability between 5.18 and 5.23 GHz for y-polarized incident wave. For the frequency band of 5.18-5.23 GHz, the transmission goes up to - 4 dB, while the polarization extinction ratio (PER) reaches up to - 27.4 dB at 5.2 GHz. Similarly, for x-polarized incident wave, three strategic CPS operating bands are achieved within the frequency ranges of 10.64-10.82 GHz, 12.25-12.47 GHz, and 14.42-14.67 GHz. The maximum PER of 47.16 dB has been achieved for the 14.42-14.67 GHz frequency band at 14.53 GHz. Furthermore, the response of the metasurface does not vary against oblique incidences up to 45°. The simple structure, angular stability, multiband and miniaturized size make this metasurface an outstanding applicant for polarization conversion and biomedical applications.

摘要

在这篇研究文章中，提出了一种多频带圆极化选择（CPS）超表面。通过在结构中引入手性，设计了一个互易双层超表面。所提出的超表面的顶层由内部带有十字形结构的圆形分裂环谐振器组成。通过将相同的结构旋转 90°，在超表面的底部打印相同的结构，从而在结构中实现手性。所提出的超表面能够在 y 极化入射波的 5.18-5.23GHz 之间增加 CPS 表面性能。在 5.18-5.23GHz 的频带内，传输达到-4dB，而在 5.2GHz 时极化消光比（PER）达到-27.4dB。类似地，对于 x 极化入射波，在 10.64-10.82GHz、12.25-12.47GHz 和 14.42-14.67GHz 的频率范围内实现了三个战略 CPS 工作频段。在 14.53GHz 时，在 14.42-14.67GHz 频带内达到了 47.16dB 的最大 PER。此外，超表面的响应在 45°以内的斜入射时不会发生变化。这种超表面具有结构简单、角度稳定性、多频和小型化等特点，是极化转换和生物医学应用的杰出候选者。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/20d7/7815798/3cde85c2fe9a/41598_2021_81435_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/20d7/7815798/2427c9330410/41598_2021_81435_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/20d7/7815798/673da072e3f5/41598_2021_81435_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/20d7/7815798/b2949644c685/41598_2021_81435_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/20d7/7815798/fc300a413f91/41598_2021_81435_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/20d7/7815798/cabb2ce60364/41598_2021_81435_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/20d7/7815798/d43761774ced/41598_2021_81435_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/20d7/7815798/ce768b412282/41598_2021_81435_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/20d7/7815798/3cde85c2fe9a/41598_2021_81435_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/20d7/7815798/2427c9330410/41598_2021_81435_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/20d7/7815798/673da072e3f5/41598_2021_81435_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/20d7/7815798/b2949644c685/41598_2021_81435_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/20d7/7815798/fc300a413f91/41598_2021_81435_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/20d7/7815798/cabb2ce60364/41598_2021_81435_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/20d7/7815798/d43761774ced/41598_2021_81435_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/20d7/7815798/ce768b412282/41598_2021_81435_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/20d7/7815798/3cde85c2fe9a/41598_2021_81435_Fig8_HTML.jpg

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