Transmission Characteristics of a Twisted Radio Wave Based on Circular Traveling-Wave Antenna
Transmission Characteristics of a Twisted Radio Wave Based on Circular Traveling-Wave Antenna
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DOI：
10.1109/tap.2015.2393885
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发表时间：
2015-01
影响因子：
5.7
通讯作者：
Shilie Zheng;Xiaonan Hui;Xiaofeng Jin;H. Chi;Xianmin Zhang
中科院分区：
文献类型：
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作者：
Shilie Zheng;Xiaonan Hui;Xiaofeng Jin;H. Chi;Xianmin Zhang
证明了相位分布沿 lφ 圆的行波圆形环形天线可产生扭曲的无线电波。在柱坐标系下推导了其辐射场的理论公式，并用于分析其传输特性，例如辐射图案、偏振态的演化以及包括轨道角动量（OAM）模式和自旋角动量（SAM）模式在内的角动量模式。提出并进行了此类天线的实际配置原型以验证理论结果。这种理论分析不仅适用于无线电波，而且适用于整个电磁频谱。
A traveling-wave circular loop antenna with its phase distribution along the circle of lφ is demonstrated to generate the twisted radio wave. Theoretical formulations of its radiation fields are deduced in the cylindrical coordinate system and used to analyze its transmission characteristics, such as the radiation patterns, the evolution of the polarization states, and the angular momentum modes including the orbital angular momentum (OAM) modes and the spin angular momentum (SAM) modes. The prototype of a practical configuration for such antenna is proposed and conducted to validate the theoretical results. This theoretical analysis is applicable not only to radio waves but also to the whole electromagnetic spectrum.