一种基于超表面的四波束天线  

A Four-Beam Antenna Based on Metasurface

作　　者：窦海鹏 Dou Haipeng(School of Information Engineering,Shanxi Vocational University of Engineering Science and Technology,Jinzhong Shanxi 030619,China)

机构地区：[1]山西工程科技职业大学信息工程学院,山西晋中030619

出　　处：《山西电子技术》2024年第2期75-78,共4页Shanxi Electronic Technology

基　　金：山西省高等学校科技创新项目(2020L0501);山西工程科技职业大学校科研基金项目(KJ202207)。

摘　　要：为了满足无线通信系统对天线性能的要求,提出了一种四波束超表面天线。首先通过增大接地板尺寸的方法使缝隙天线辐射出了四个波束,然后在缝隙天线上覆盖超表面,进一步提高了天线的峰值增益,并分析对比了超表面的参数和耦合缝隙的形状对天线性能的影响。仿真结果表明,该天线的-10-dB阻抗带宽为520 MHz(5.34~5.86 GHz)。同时,天线可以同时辐射出俯仰角θ分别为-140°、-40°、+40°和+140°的四个不同方向的波束,在工作频率5.6 GHz处,各波束的峰值增益分别为5.12 dBi、7.12 dBi、7.11 dBi和5.4 dBi。In order to meet the performance requirements of wireless communication systems for antennas,a four-beam metasurface antenna is proposed in this paper.Firstly,a slot antenna which can radiate four beams is realized by increasing the size of the ground plane.Then,a metasurface is covered on the slot antenna to further improve the peak gains of the antenna.Also,the effects of the parameters of the metasurface and the shape of the coupling slot on the antenna performance are analyzed and compared.The simulation results show that the-10-dB impedance bandwidth of the antenna is 520 MHz(5.34~5.86 GHz).At the same time,the antenna can simultaneously radiate four beams pointing to the elevation angleθof-140°,-40°,+40°and+140°.The peak gains of the four beams are 5.12 dBi,7.12 dBi,7.11 dBi and 5.4 dBi,respectively.

关 键 词：缝隙天线 超表面 多波束 增益 

分 类 号：TN821[电子电信—信息与通信工程]