双频圆极化北斗导航微带天线设计  

Design of Dual-frequency Circular Polarization Beidou Navigation Microstrip Antenna

作　　者：李栎杉 LI Lishan(Anhui Telecom Planning and Design Co.,Ltd.,Hefei 230031,China)

机构地区：[1]安徽电信规划设计有限责任公司,安徽合肥230031

出　　处：《现代信息科技》2024年第24期21-25,共5页Modern Information Technology

摘　　要：随着北斗卫星导航系统的发展,导航定位需求不断增加,圆极化北斗导航天线具有重要的研究价值。为满足北斗终端设备对天线尺寸小型化、低轴比以及多频段的需求,文章采用单馈电点和两层贴片的设计方案,设计出一款覆盖BDS-3 B3I和BDS-3 B1I频段的微带天线,该设计方案采用在圆形贴片上开槽的方式引入微扰使天线辐射圆极化波。此外,通过引入CSRR结构实现天线小型化。结果表明,提出的天线在两个频段均实现右旋圆极化,尺寸为60 mm×60 mm×5.8 mm,BDS-3 B3I和BDS-3 B1I频段轴向增益均大于2.6 dB,轴向轴比小于3 dB,仰角20°轴比小于7 dB,仰角20°增益大于-4 dB,满足设计指标。在大地测量、桥梁施工、海洋测量、自动驾驶导航等定位精度要求较高的场景中具有广泛的应用前景。With the development of Beidou navigation satellite system,the demand for navigation and positioning is increasing,and the circular polarization Beidou navigation antenna has important research value.To meet the requirements of Beidou terminal equipment for antenna size miniaturization,low axial ratio and multi-frequency band,this paper adopts a design scheme of single feed point and two-layer patch to design a microstrip antenna covering BDS-3 B3I and BDS-3 B1I frequency bands.And the design scheme introduces the perturbation to make the antenna radiate the circular polarization wave by the method of opening slot on a circular patch.In addition,it realizes the antenna miniaturization by introducing the CSRR structure.The results show that the proposed antenna realizes circular polarization in both frequency bands,with dimensions of 60 mm×60 mm×5.8 mm.The axial gains of BDS-3 B3I and BDS-3 B1I bands are both greater than 2.6 dB,the axial ratio is less than 3 dB,the axial ratio of the elevation angle 20°is less than 7 dB,and the gain of the elevation angle 20°is greater than-4 dB,which meet the design index.It has a wide range of application prospects in scenarios with high positioning accuracy requirements,such as geodesy,bridge construction,oceanographic surveying,and autonomous driving navigation.

关 键 词：导航 微带天线 双频 圆极化 

分 类 号：TN82[电子电信—信息与通信工程]