一种用于5G应用的、具有线性到圆极化以及圆到线性极化转换功能的双层宽带角稳定频率选择表面。

A dual layer wideband angular stable frequency selective surface for linear to circular and circular to linear polarization conversion for 5G applications.

作者信息

Paramanik Akash, Venkata Krishnamurthy Chitti, Subramanian Venkatachalam

机构信息

Microwave Laboratory, Department of Physics, Indian Institute of Technology Madras, Chennai, 600036, Tamilnadu, India.

出版信息

Sci Rep. 2025 Apr 8;15(1):12059. doi: 10.1038/s41598-025-96363-2.

DOI:10.1038/s41598-025-96363-2

PMID:40200075

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11978863/

Abstract

This work proposes novel transmission type frequency selective surface (FSS) for converting linear to circular (LP to CP) and circular to linear (CP to LP) polarizations. The structure has dual metallic layers sandwiching a dielectric substrate (Rogers RT5880). Both top and bottom metallic layers have the same unit cell structure. This transmission-type polarization converter has a maximum polarization conversion efficiency (PCR) of 99.98% with a bandwidth of 23.8% at 27.3 GHz. The structure is also angularly stable upto 60. Though the structure is designed for the 5G band, it is possible to tune this structure to the frequency of our interest. The novelty of the proposed design lies in a low structural complexity, tunable frequency range, and very high angular stability. This low-loss, wideband, and high angularly stable polarization converter FSS type is an advantageous alternative to conventional CP sources and can be used for communication purposes.

摘要

这项工作提出了一种新型的传输型频率选择表面（FSS），用于将线极化转换为圆极化（LP到CP）以及将圆极化转换为线极化（CP到LP）。该结构有两层金属层夹着一个介质基板（罗杰斯RT5880）。顶部和底部金属层具有相同的单元结构。这种传输型极化转换器在27.3GHz时具有99.98%的最大极化转换效率（PCR）以及23.8%的带宽。该结构在高达60°的角度范围内也保持稳定。虽然该结构是为5G频段设计的，但可以将其调谐到我们感兴趣的频率。所提出设计的新颖之处在于结构复杂度低、频率范围可调以及非常高的角度稳定性。这种低损耗、宽带且高角度稳定的极化转换器FSS类型是传统圆极化源的一个有利替代方案，可用于通信目的。