宽带高精度GNSS双频柱状螺旋天线  

Windband High-precision GNSS Dual-frequency Cylindrical Spiral Antenna

作　　者：李晓鹏 李锐雄[3] 高伟 LI Xiaopeng;LI Ruixiong;GAO Wei(Guangzhou Hi-Target Navigation Tech Co.,Ltd.,Guangzhou 511400,China;South China University of Technology,Guangzhou 510641,China;Guangdong University of Technology,Guangzhou 510006,China;Hi-Target Surveying Instrument Co.,Limited,Guangzhou 511400,China)

机构地区：[1]广州中海达卫星导航技术股份有限公司,广东广州511400 [2]华南理工大学,广东广州510641 [3]广东工业大学,广东广州510006 [4]广州市中海达测绘仪器有限公司,广东广州511400

出　　处：《现代信息科技》2022年第1期48-51,55,共5页Modern Information Technology

基　　金：北斗高精度位置服务平台建设(20212210003)。

摘　　要：文章设计了一种GNSS双频宽带多臂螺旋天线,采用精度高、成本低的激光雕刻工艺,将螺旋臂加载在介质支架上。为了提高增益,在低频辐射臂顶端加载新型短路结构,引入四条寄生臂形成耦合谐振,拓展低频段的工作带宽。测试结果表明,在1.175~1.267 GHz、1.517~1.624 GHz频段内增益大于1 dBi,两个频段内的最高增益分别为4.09 dBi、2.8 dBi,高低频段3 dB轴比波束宽度分别为190°、195°。由此得知该天线能覆盖四大卫星导航系统所有频点,满足GNSS精确测量设备的需求。In this paper,a dual-frequency wideband multi-arm antenna is designed.The helical arm is loaded on the dielectric support by using the laser engraving process with high precision and low cost.In order to improve the radiation gain of the antenna,a novel short-circuit structure is loaded on the top of the low-frequency radiating arms.Four parasitic arms are introduced to form a coupling resonance and expand the working bandwidth of low frequency band.The test results show that the gains are greater than 1 dBi in the frequency bands of 1.175~1.267 Ghz and 1.517~1.624 Ghz,and the peak gains reach 4.09 dBi and 2.8 dbi,respectively.The 3 dB axial ratio beamwidths of the high and low frequency band reach 190°and 195°,respectively.Therefore,it is known that the antenna can cover all frequency points of the four satellite navigation systems and meet the requirements of GNSS accurate measurement equipment.

关 键 词：螺旋天线 导航系统 宽带 短路结构 寄生 

分 类 号：TN823.31[电子电信—信息与通信工程]