A metal-only reconfigurable reflectarray antenna for generating diversified circular-polarization focused beams and mode-agile vortex beams

IF 0.6 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Electromagnetics Pub Date : 2023-04-03 DOI:10.1080/02726343.2023.2206266

Yuxin Mo, Min Wang, Wei Luo, Yi Ren

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引用次数: 0

Abstract

ABSTRACT In this article, a metal-only reconfigurable reflectarray antenna (RRA) is proposed for generation of diversified circular-polarization (CP) focused beams and mode-agile vortex beams in the X-band. The proposed RRA element has the 3-D metal-only configuration, which consists of three staircases with different heights, a turntable, a latch, and a base. By rotating the proposed RRA element in 45° steps, the ability of 1-bit phase quantization with orthogonal linear polarization (LP) reconfigurability can be realized. Then, a 26 × 26-elements reconfigurable reflectarray antenna feeding by a linear polarization horn antenna is designed to enable free conversion of line-to-circle polarization at the array level. Full-wave simulations show that the diversified circular-polarization beams can be synthesized by adjusting the aperture element distribution. Furthermore, a manually reconfigurable reflectarray antenna prototype is fabricated to obtain the actual performance of the synthetic LHCP focused beams. The measured maximum gain of the LHCP beams is 27.1 dBi, with the aperture efficiency of 24.2% where the beam point at 20°, and the 1-dB gain bandwidth is 18.0% (9.3 GHz − 11.1 GHz). Finally, mode-agile vortex beams can also be realized by using the proposed reconfigurable reflectarray antenna, and the simulated results show that the mode purity of vortex beams are all above 35% in different modes, and the maximum gain of the vortex beams is 21.1 dBi, with aperture efficiency of 6.1% where the mode of vortex beams is −1.

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一种用于产生多样化圆偏振聚焦波束和模捷旋波束的全金属可重构反射天线

摘要:本文提出了一种纯金属可重构反射天线(RRA)，用于在x波段产生多样化圆极化(CP)聚焦波束和模捷旋波束。提议的RRA元素具有3-D金属结构，由三个不同高度的楼梯、一个转盘、一个门闩和一个底座组成。通过45°旋转所提出的RRA元件，可以实现具有正交线性偏振(LP)可重构性的1位相位量化。然后，设计了由线极化喇叭天线馈电的26 × 26单元可重构反射阵天线，实现了阵列级线圆极化的自由转换。全波仿真结果表明，通过调整孔径元件的分布，可以合成出多样化的圆偏振光束。此外，为了获得合成LHCP聚焦光束的实际性能，还制作了一个手动可重构反射天线原型。测量到的LHCP波束最大增益为27.1 dBi，波束指向20°处的孔径效率为24.2%，1 db增益带宽为18.0% (9.3 GHz ~ 11.1 GHz)。最后，利用所提出的可重构反射天线还可以实现模式敏捷涡旋波束，仿真结果表明，涡旋波束在不同模式下的模式纯度均在35%以上，涡旋波束在模式为−1时的最大增益为21.1 dBi，孔径效率为6.1%。

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

Electromagnetics 工程技术-工程：电子与电气

CiteScore

1.60

自引率

12.50%

发文量

审稿时长

6 months

期刊介绍： Publishing eight times per year, Electromagnetics offers refereed papers that span the entire broad field of electromagnetics and serves as an exceptional reference source of permanent archival value. Included in this wide ranging scope of materials are developments in electromagnetic theory, high frequency techniques, antennas and randomes, arrays, numerical techniques, scattering and diffraction, materials, and printed circuits. The journal also serves as a forum for deliberations on innovations in the field. Additionally, special issues give more in-depth coverage to topics of immediate importance. All submitted manuscripts are subject to initial appraisal by the Editor, and, if found suitable for further consideration, to peer review by independent, anonymous expert referees. Submissions can be made via email or postal mail.