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Journal of Antennas 2023
一种缺陷型超表面四波束天线设计
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Abstract:
多波束与波束扫描天线实现大范围通信区域覆盖的同时能减少多径衰落，提高频谱资源利用率。本文设计一个基于缺陷超表面四波束天线，以四个不同端口馈电的缝隙耦合天线作为馈源，在馈源天线上加四个圆形贴片改善波束性能，最后在其上方加载缺陷超表面，基于法布里谐振腔原理实现四个不同指向的波束偏转。该天线工作频率是6.76 GHz，增益为9.12 dB。所设计的天线具有结构简单、剖面低、成本低等优势。基于缺陷超表面的天线既可以实现低剖面、低成本的优势同时又可灵活调控电磁波辐射，这一构思为多波束通信天线的设计提供了一个新的方法。
Multi-beam and beam-scanning antennas can reduce multi-path fading and improve the utilization rate of spectrum resources while realizing the coverage of a wide range of communication areas. In this paper, a four-beam antenna based on defect metasurface is designed. Four slot coupled antennas fed from four different ports are used as feeders. Four circular patches are added to the feed antenna to improve the beam performance. Finally, the defect metasurface is loaded on the top of the feed antenna to realize the deflection of four beams with different directions based on the principle of Fabry resonator. The antenna operates at 6.76 GHz and has a gain of 9.12 dB. The designed antenna has the advantages of simple structure, low profile and low cost. The antenna based on the defect metasurface can realize the advantages of low profile, low cost and flexible regulation of electromagnetic radiation. This idea provides a new method for the design of multi-beam communication antennas.
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