一种新型单极子GNSS天线的设计  

Design of Novel Monopole Antenna for GNSS

作　　者：张奥运 张忠祥[2] 余文胜 吴先良[1] 

机构地区：[1]安徽大学电子信息工程学院,安徽合肥230039 [2]合肥师范学院电子信息工程学院,安徽合肥230009

出　　处：《通信技术》2017年第10期2362-2371,共10页Communications Technology

摘　　要：设计了一种新型的应用于全球卫星导航系统(GNSS)的宽带圆极化单极子天线。天线使用L型微带线馈电,在正方形地板上加载T型微扰枝节实现圆极化。利用仿真软件HFSS进行仿真,结果表明,天线在1.06~1.97 GHz频率范围内反射系数小于-10 dB,在1.13~2.25 GHz频率范围内圆极化轴比AR小于3 dB。加工天线实物并进行测试,实测的10 dB阻抗带宽为1.1~1.75GHz(45.6%),实测的3 dB轴比带宽为1.15~2.13 GHz(60%)。可见,天线在很宽的频段内实现了良好的阻抗匹配特性和圆极化特性,且结构简单、剖面低、尺寸小、制作成本低、重量轻,在卫星导航技术中具有广阔的应用前景。A novel broadband circularly-polarized monopole antenna for GNSS（Global Navigation Satellite System） is proposed and designed.The antenna is fed by L-shaped microstrip line and the circular polarization is achieved by introduction of T-shaped branch in the square ground plane.Simulation with HFSS software indicates that the reflection coefficient of the antenna is less than-10 dB in the frequency range of 1.06 to 1.97 GHz,and the ratio of circularly-polarized axis to AR is less than 3 dB in the range of 1.13 to 2.25 GHz.The finished antenna is tested,and the measured impedance bandwidth of 10 dB is 1.1 ~ 1.75 GHz（45.6%） and the measured bandwidth of 3 dB axis is 1.15 ~ 2.13 GHz（60%）.It can be seen that the antenna could realize good impedance matching characteristics and circular polarization characteristics over a wide frequency band.In addition,the antenna is simple in structure,low in profile,small in size,low in manufacture cost and light in weight,thus has wide application prospects in the satellite navigation technology.

关 键 词：GNSS 单极子天线 宽带 圆极化 

分 类 号：TN82[电子电信—信息与通信工程]