In this article, a transformation optics (TO)‐based orbital angular momentum antenna is presented. By applying the coordinate transformation, the electromagnetic wave can be arbitrarily manipulated. A TO‐based horn antenna working at 5 GHz is designed. The simulation results show that by adopting the proposed TO‐based filling, the main lobe angle is reduced by 4° and the maximum gain is improved by 6.4 dB. At the same time, the proposed horn antenna has high aperture efficiency.

中文翻译：

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基于转换光学的喇叭天线，用于聚焦轨道角动量波束

本文介绍了一种基于转换光学（TO）的轨道角动量天线。通过应用坐标变换，可以任意地操纵电磁波。设计了一个工作在5 GHz的基于TO的喇叭天线。仿真结果表明，采用建议的基于TO的填充，主瓣角减小了4°，最大增益提高了6.4 dB。同时，提出的号角天线具有较高的孔径效率。