A 1-Bit Reconfigurable Transmitarray With Enhanced Cross-Polarization Discrimination

IF 3.7 2区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-02-13 DOI:10.1109/LAWP.2025.3541548

Chenyang Meng;Chang Fang;Yin Li;Guangyin Feng;Baiyang Liu;Sai-Wai Wong;Hao Chen

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Abstract

A wideband 1-bit reconfigurable transmitarray (RTA) with low cross-polarization and 2-D beam-scanning capacity is proposed for X-band applications. Based on the patch antenna, an RTA element was designed with symmetrical on the top and bottom layers, each capable of 1-bit phase control. Slots placed on the patch structure impede cross-polarization currents, improving cross-polarization discrimination (XPD) by over 10 dB compared to unslotted designs. To further suppress the cross-polarization radiation level, a dual-layer phase coding scheme is proposed. It improves XPD by carefully selecting RTA element states and configuring the phase distribution for cross-polarization symmetric cancellation, achieving an average improvement of more than 5 dB across different beam scanning angles. Owing to the symmetry of the RTA element, the proposed RTA can be fed from either the top or bottom, improving XPD in both directions. An RTA consisting of a 15 × 15-element configuration and fed by a patch antenna is designed and fabricated to demonstrate the proposed scheme. The RTA exhibits a peak gain of 18.5 dBi at 9.5 GHz and demonstrates effective ±60° scanning coverage in both principal planes, achieving an XPD of 40 dB at the scanning angle of 0°.

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一种具有增强交叉极化分辨能力的1位可重构发射阵列

提出了一种具有低交叉极化和二维波束扫描能力的宽带1位可重构传输阵列（RTA）。在贴片天线的基础上，设计了上下两层对称的RTA元件，每层具有1位相位控制能力。贴片结构上的插槽阻碍了交叉极化电流，与非插槽设计相比，交叉极化鉴别（XPD）提高了10 dB以上。为了进一步抑制交叉极化辐射水平，提出了一种双层相位编码方案。通过精心选择RTA元态和配置交叉极化对称对消的相位分布，提高了XPD，在不同波束扫描角度下平均提高了5 dB以上。由于RTA元素的对称性，所提出的RTA可以从顶部或底部馈送，从而提高了两个方向的XPD。设计并制作了一个由15 × 15元结构和贴片天线馈电组成的RTA来演示所提出的方案。RTA在9.5 GHz时的峰值增益为18.5 dBi，在两个主平面上都具有±60°的有效扫描覆盖，在扫描角为0°时XPD达到40 dB。

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 Antennas and Wireless Propagation Letters 工程技术-电信学

CiteScore

8.00

自引率

9.50%

发文量

529

审稿时长

1.0 months

期刊介绍： IEEE Antennas and Wireless Propagation Letters (AWP Letters) is devoted to the rapid electronic publication of short manuscripts in the technical areas of Antennas and Wireless Propagation. These are areas of competence for the IEEE Antennas and Propagation Society (AP-S). AWPL aims to be one of the "fastest" journals among IEEE publications. This means that for papers that are eventually accepted, it is intended that an author may expect his or her paper to appear in IEEE Xplore, on average, around two months after submission.