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首页> 美国卫生研究院文献>Scientific Reports >Ultra-wideband polarization conversion metasurface and its application cases for antenna radiation enhancement and scattering suppression
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Ultra-wideband polarization conversion metasurface and its application cases for antenna radiation enhancement and scattering suppression

机译：超宽带极化转换超表面及其在天线辐射增强和散射抑制中的应用案例

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摘要

A double-layer complementary metasurface (MS) with ultra-wideband polarization conversion is presented. Then, we propose two application cases by applying the polarization conversion structures to aperture coupling patch antenna (ACPA). Due to the existence of air-filled gap of ACPA, air substrate and dielectric substrate are used to construct the double-layer MS. The polarization conversion bandwidth is broadened toward low-frequency range. Subsequently, two application cases of antenna are proposed and investigated. The simultaneous improvement of radiation and scattering performance of antenna is normally considered as a contradiction. Gratifyingly, the contradiction is addressed in these two application cases. According to different mechanism of scattering suppression (i.e., polarization conversion and phase cancellation), the polarization conversion structures are utilized to construct uniform and orthogonal arrangement configurations. And then, the configurations are integrated into ACPA and two different kinds of metasurface-based (MS-based) ACPA are formed. Radiation properties of the two MS-based ACPAs are improved by optimizing the uniform and orthogonal arrangement configurations. The measured results suggest that ultra-wideband polarization conversion properties of the MS are achieved and radiation enhancement and scattering suppression of the two MS-based ACPAs are obtained. These results demonstrate that we provide novel approach to design high-performance polarization conversion MS and MS-based devices.
机译：介绍了一种具有超宽带极化转换的双层互补超颖表面（MS）。然后，我们通过将极化转换结构应用于孔径耦合贴片天线（ACPA），提出了两个应用案例。由于存在ACPA的气隙，因此采用空气基质和介电基质来构成双层MS。极化转换带宽向低频范围扩展。随后，提出并研究了两种天线的应用案例。通常认为天线的辐射和散射性能的同时改善是矛盾的。令人欣慰的是，在这两个应用案例中解决了矛盾。根据散射抑制的不同机制（即，偏振转换和相位抵消），利用偏振转换结构来构造均匀且正交的配置结构。然后，将配置集成到ACPA中，并形成两种不同类型的基于元表面（基于MS）的ACPA。通过优化均匀和正交排列配置，可以改善两个基于MS的ACPA的辐射性能。测量结果表明，实现了MS的超宽带极化转换特性，并且获得了两种基于MS的ACPA的辐射增强和散射抑制。这些结果表明，我们提供了新颖的方法来设计高性能极化转换MS和基于MS的设备。

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