一种宽带圆极化缝隙天线的研究与设计  

Research and Design of Broadband Circularly Polarized Slot Antenna

作　　者：韩国瑞[1] 张倩 陈新伟[1] 袁浩 HAN Guorui;ZHANG Qian;CHEN Xinwei;YUAN Hao(School of Physics and Electronic Engineering,Shanxi University,Taiyuan 030006,China)

机构地区：[1]山西大学物理电子工程学院,山西太原030006

出　　处：《测试技术学报》2024年第2期129-138,共10页Journal of Test and Measurement Technology

基　　金：国家科学基金资助项目(62071282,61771295);山西省自然科学基金资助项目(201901D111027,202203021211295);山西省回国留学人员科研资助项目(2021-006)。

摘　　要：设计了一种结构简单的宽带圆极化缝隙天线,由单层介质基板和两层金属构成,覆盖WiMAX、WLAN和5G通信的sub6 GHz频段。通过在方形缝隙拐角处分别添加两个矩形贴片和一个倒L枝节,实现宽带圆极化辐射。天线采用微带耦合馈电的方式,通过调整T形微带馈线的长度和矩形贴片的宽度,进一步展宽了天线的带宽。测试结果表明,天线的−10 dB阻抗带宽为1.91~7.14 GHz,轴比带宽为2.5~6.3 GHz,相对轴比带宽为86.4%,峰值增益在5.5 GHz处达到5.5 dBic。A simple structure broadband circular polarization slot antenna is presented in this paper.It is composed of monolayer dielectric substrate and two metal layers and coveringWiMAX、WLAN and the 5G-sub6 GHz.Two rectangle patches and an inverted L strip are embedded at the corner of the square slot,then circularly polarized radiation is realized.The proposed antenna fed by the coupling microstrip.The bandwidth of the proposed antenna is extended by adjusting the length of the T-shaped microstrip and the width of the rectangular patch.The measured results show that the−10 dB impedance bandwidth is 1.91~7.14 GHz,the axial ratio bandwidth is 2.5~6.3 GHz,the relative ratio bandwidth is 86.4%,and the peak gain is 5.5 dBic at 5.5 GHz.

关 键 词：圆极化天线 轴比带宽 阻抗带宽 

分 类 号：TN822.8[电子电信—信息与通信工程]