High-Scanning-Rate Circularly Polarized Dual-Beam Frequency-Scanning Antenna Based on Orthogonal Cosine-Type SSPP

IF 3.7 2区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-01-21 DOI:10.1109/LAWP.2025.3532514

Kefeng Ji;Yulong Zhou;Huanhuan Yang;Tong Li;Sijia Li;Zhiyun Zhang;Jing Zou;Xiangyu Cao

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Abstract

In this letter, a circularly polarized (CP) dual-beam frequency-scanning antenna with high scanning rate is designed, which is constructed by a double-layer orthogonal spoof surface plasmon polariton (SSPP) transmission line after cosine modulation. The double-layer orthogonal SSPP element has strong dispersion characteristics and dispersion separation, which is helpful to realize dual-beam continuous scanning with high scanning rate and large scanning range. By adopting cosine modulation on the SSPP transmission line, the surface wave in the form of slow wave can be disturbed to form leaky wave radiation. Finally, the orthogonal cosine-type SSPP structures of the upper and lower layers are shifted by about a quarter wavelength to achieve circular polarization. The experimental results show that the 3 dB axial ratio bandwidth of the circularly polarized dual-beam frequency scanning antenna is 5.14 GHz to 5.41 GHz, the relative bandwidth is 5.12%, the continuous scanning range is 33°, and the scanning rate can reach 6.45°/%. The average radiation gain is 8.18 dBi, and the maximum gain is 8.79 dBi. The overall radiation efficiency is more than 50%, and the average radiation efficiency is 61.1%, which has a good circular polarization radiation performance. The design in this letter greatly improves the scanning rate of the circular polarization frequency-scanning antennas and has broad application prospects in modern communication systems requiring fast response.

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基于正交余弦型SSPP的高扫描速率圆极化双波束扫描天线

本文设计了一种高扫描速率的圆极化（CP）双波束频率扫描天线，该天线由经余弦调制的双层正交欺骗表面等离子激元（SSPP）传输线构成。双层正交SSPP元件具有较强的色散特性和色散分离能力，有助于实现高扫描速率和大扫描范围的双光束连续扫描。在SSPP传输线上采用余弦调制，可以对慢波形式的表面波进行扰动，形成漏波辐射。最后，将上下两层的正交余弦型SSPP结构偏移约四分之一波长，实现圆偏振。实验结果表明，圆极化双波束频率扫描天线的3db轴比带宽为5.14 GHz ~ 5.41 GHz，相对带宽为5.12%，连续扫描范围为33°，扫描速率可达6.45°/%。平均辐射增益为8.18 dBi，最大增益为8.79 dBi。总体辐射效率大于50%，平均辐射效率为61.1%，具有良好的圆极化辐射性能。本文的设计大大提高了圆极化扫频天线的扫描速率，在要求快速响应的现代通信系统中具有广阔的应用前景。

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

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.