A Wideband Reconfigurable 2-Bit Transmitarray Antenna With Cross-Polarization Suppression

IF 4.8 2区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-07-08 DOI:10.1109/LAWP.2025.3587290

Bingjie Xiang;Kwai-Man Luk

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Abstract

A wideband 2-bit transmitarray antenna (TA) with two-dimensional (2-D) electronically beam-scanning capability is presented. Using the receive-and-transmit method, the reconfigurable TA (RTA) element is designed by combining two reconfigurable magnetoelectric (ME) dipole antennas. PIN diodes are integrated in the RTA element to control the current path. Hence, the receiving and transmitting layers can independently provide a 90° and 180° phase shift to achieve the 2-bit resolution. Furthermore, a novel prephase distribution is introduced in the TA aperture to suppress the cross-polarization levels. As a demonstration, a wideband electronically RTA with 11 × 11 elements is designed, fabricated and measured. The measured results show the prototype can achieve a 3 dB gain bandwidth of 32%, a peak gain of 21 dBi, and a peak aperture efficiency of 37%. The measured cross-polarization levels are suppressed lower than 20 dB. Moreover, the proposed RTA can support the wide scanning angles from −50° to +50° in both E- and H-planes within the operating bandwidth.

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一种抑制交叉极化的宽带可重构2位发射阵列天线

提出了一种具有二维电子束扫描能力的宽带2位发射阵列天线（TA）。采用收发法，将两个可重构磁电偶极子天线组合在一起，设计了可重构TA （RTA）元件。PIN二极管集成在RTA元件中以控制电流路径。因此，接收层和发射层可以独立提供90°和180°相移以实现2位分辨率。此外，在TA孔径中引入了一种新的预相分布来抑制交叉极化能级。作为示范，设计、制作和测量了一个11 × 11元件的宽带电子RTA。测量结果表明，该原型机的3db增益带宽为32%，峰值增益为21 dBi，峰值孔径效率为37%。测量的交叉极化电平被抑制在20 dB以下。此外，在工作带宽范围内，该RTA可以在E面和h面支持−50°到+50°的宽扫描角度。

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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.