一种新型双圆极化平面微带缝隙天线  

Novel dual circular polarization planar microstrip slot antenna

作　　者：刘凡 赵晓燕 赵宏志 姜兆能 LIU Fan;ZHAO Xiaoyan;ZHAO Hongzhi;JIANG Zhaoneng(Anhui Power Source Technology Company Limited,Xuancheng 242000,China;School of Computer,Hefei University of Technology,Hefei 230031,China)

机构地区：[1]安徽动力源科技有限公司,安徽宣城242000 [2]合肥工业大学计算机学院,安徽合肥230031

出　　处：《西安电子科技大学学报》2020年第3期86-91,共6页Journal of Xidian University

基　　金：学术新人提升计划B项目(JZ2019HGTB0093)。

摘　　要：随着无线通信技术的飞速发展,使用一副天线来实现多根天线的功能成为了人们研究的热点。文章对双圆极化天线进行了研究,通过在接地平面中使用圆形环形槽和两条正交的L形馈线,可以在同一频带中实现右旋圆极化和左旋圆极化。同时,在接地平面的中心上适当地切槽并在L形馈线的前部添加寄生元件,可以改变馈电线和接地平面表面上的电流,进而可改进天线的圆极化性能。仿真和测量结果表明,天线的阻抗带宽约为59%(3.13~5.75 GHz),3 dB轴比带宽约为40.5%(3.23~4.87 GHz)。两个端口隔离度高于10 dB。其结果表明,所设计的天线在阻抗带宽和轴比带宽方面具有良好的性能。With the rapid development of wireless communication technology,how to use an antenna to realize the function of multiple antennas has become a hot research topic.The double circularly polarized antenna studied in this paper can achieve right-handed circular polarization and left-handed circular polarization in the same frequency band by using a circular annular groove and two orthogonal L-shaped feed lines in the ground plane.At the same time,properly grooving at the center of the ground plane and adding parasitic elements to the front of the L-shaped feed line can change the current on the surface of the feed line and in the ground plane,thereby improving the circular polarization performance of the antenna.Measurement and simulation results show that the impedance bandwidth of the antenna is about 59%(3.13~5.75 GHz),and the 3 dB axial ratio bandwidth is about 40.5%(3.23~4.87 GHz).Also,the isolation between the two ports is higher than 10 dB.The results show that the designed antenna has a good performance in both impedance bandwidth and axial ratio bandwidth.

关 键 词：圆极化 微带缝隙天线 宽带 

分 类 号：TN828.4[电子电信—信息与通信工程]