A Highly Miniaturized and Wide Angularly Stable Antenna-Filter-Antenna-Based Polarization Rotating Frequency Selective Surface for Radar Systems

IF 3.6 3区计算机科学 Q2 COMPUTER SCIENCE, INFORMATION SYSTEMS

IEEE Access Pub Date : 2025-09-03 DOI:10.1109/ACCESS.2025.3605845

Muhammad Nasir;Slawomir Koziel;Adnan Iftikhar

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Abstract

This paper presents a novel polarization rotating frequency selective surface (PR-FSS) design based on the antenna-filter-antenna (AFA) configuration. The proposed design efficiently overcomes the limitations related to miniaturization and wide angular stability in polarization converters currently used in advanced radar systems. The proposed metasurface (MS) features an aperture-coupled design using U- and 90° U-shaped patch elements separated by a 45° slotted ground plane. The incorporation of the particular shape in the proposed design enabled high-efficiency linear-to-linear transmissive cross-polarization (LTL-TCP) conversion and bandpass response, simultaneously. The design concept is initially verified using full-wave electromagnetic (EM) simulations and then validated experimentally. The results showed that the design has stable performance with a wide bandwidth and robust angular response up to 80°. In summary, the prototype offered a consistent polarization conversion ratio (PCR) above 0.95 over the frequency range from 5.18 – 5.72 GHz with a low insertion loss of around 0.4 dB. A good agreement between the simulation and measured results demonstrated the applicability of such miniaturized structures in polarization conversion applications, such as radar systems, to improve target detection and classification.

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一种高度小型化、宽角稳定的天线滤波天线偏振旋转选频面

提出了一种基于天线滤波天线（AFA）结构的偏振旋转频率选择面（PR-FSS）设计方法。所提出的设计有效地克服了目前先进雷达系统中使用的偏振变换器在小型化和广角稳定性方面的局限性。所提出的超表面（MS）具有孔径耦合设计，使用U形和90°U形贴片元件，由45°开槽接平面分隔。在提出的设计中结合特定的形状，可以同时实现高效的线性到线性透射交叉极化（LTL-TCP）转换和带通响应。设计概念首先通过全波电磁（EM）模拟进行验证，然后进行实验验证。结果表明，该设计具有较宽的带宽和80°角响应鲁棒性，性能稳定。综上所述，该原型在5.18 - 5.72 GHz频率范围内提供了超过0.95的稳定极化转化率（PCR），插入损耗低至0.4 dB左右。仿真结果与实测结果吻合良好，证明了这种小型化结构在极化转换应用（如雷达系统）中提高目标探测和分类能力的适用性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Access COMPUTER SCIENCE, INFORMATION SYSTEMSENGIN-ENGINEERING, ELECTRICAL & ELECTRONIC

CiteScore

9.80

自引率

7.70%

发文量

6673

审稿时长

6 weeks

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