具有涡旋复用和波束控制能力的基于超表面的太赫兹反射阵列天线，用于未来无线通信。

Metasurface-based THz reflectarray antenna with vortex multiplexing and beam-steering capabilities for future wireless communications.

作者信息

Ali Ali, Khalily Mohsen, Brown Tim, Tafazolli Rahim

机构信息

Department of Electrical and Electronic Engineering, 5G & 6G Innovation Centres (5GIC & 6GIC), Institute for Communication Systems (ICS), University of Surrey, Guildford GU2 7XH, UK.

出版信息

iScience. 2022 Jul 2;25(8):104725. doi: 10.1016/j.isci.2022.104725. eCollection 2022 Aug 19.

DOI:10.1016/j.isci.2022.104725

PMID:35874095

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9304595/

Abstract

This article investigates the unexplored potentials of vortices or orbital angular momentum (OAM) beams using the low-cost and high-gain dielectric reflectarray antennas (RAs) at the terahertz (THz) band. It proposes a paradigm to enable 3D beam-steering or OAM multiplexing by a single structure via tilted OAM beams. That, in turn, requires reaching the maximal attainable angles either to send multiple beams to different receivers or to focus the OAM beams of different modes in a desired direction. For this reason, two concepts are addressed in this work: (i). generating a single 3D steered OAM beam and (ii) producing multiple off-centered OAM beams with different modes. A volumetric unit cell is adopted to be accurately tuned through the aperture to steer the generated beams towards the desired direction(s). The proposed paradigm can be utilized to produce RAs with beam-steering or OAM multiplexing capabilities as candidates for THz indoor communications.

摘要

本文利用太赫兹（THz）频段低成本、高增益的介质反射阵列天线（RAs），研究了涡旋或轨道角动量（OAM）波束尚未被探索的潜力。它提出了一种范式，通过倾斜的OAM波束，利用单一结构实现三维波束转向或OAM复用。反过来，这需要达到最大可实现角度，以便将多个波束发送到不同的接收器，或者将不同模式的OAM波束聚焦到所需方向。因此，本文探讨了两个概念：（i）生成单个三维可控OAM波束；（ii）产生具有不同模式的多个偏心OAM波束。采用体元胞通过孔径进行精确调谐，将生成的波束导向所需方向。所提出的范式可用于生产具有波束转向或OAM复用能力的反射阵列天线，作为太赫兹室内通信的候选方案。