一种适用于全球卫星导航系统的宽带圆极化天线  

A Wideband Circularly Polarized Antenna Applied to GNSS

作　　者：刘伟 任晓飞[1] LIU Wei;REN Xiao-fei(The 22nd Research Institute of CETC,Qingdao 266107,China)

机构地区：[1]中国电子科技集团公司第二十二研究所,山东青岛266107

出　　处：《舰船电子对抗》2022年第1期94-97,共4页Shipboard Electronic Countermeasure

摘　　要：设计了一款可工作于全球定位系统(GPS)、全球卫星导航系统(GLONASS)、伽利略卫星导航系统及北斗卫星导航系统所有频段的宽带卫星导航天线。天线的辐射体由两对印刷在介质板两侧正交放置的对称振子构成,两对对称振子之间通过圆环形90°移相线连接馈电,从而实现圆极化。同时还设计了带有金属隔离栅的反射腔来改善天线的轴比特性并提高前后比。实测数据与仿真计算比较吻合,天线在所有导航频段范围内S_(11)小于-10 dB,轴比小于2 dB。This paper designs a broadband satellite navigation antenna that can work in all frequency bands of the global positioning system(GPS),global satellite navigation system(GLONASS),Galileo satellite navigation system and Beidou satellite navigation system.The antenna consists of two pairs of dipoles that are perpendicular to each other and etched on both sides of a dielectric slab.The two pairs of dipoles are connected with ring-shaped 90°phase shift lines to realize circu-larly polarization.At the same time,a reflective cavity with metal isolating grid is designed to im-prove the axial ratio and front-to-rear ratio of the antenna.Measured data are in good agreement with the simulation calculation,the S11 is less than-10 dB and axial ratio is less than 2 dB in all globe navigation satellite system bandwidth.

关 键 词：导航天线 圆极化 宽带 圆环形90°移相线 

分 类 号：TN821.1[电子电信—信息与通信工程]