缝隙加载的低剖面双频北斗天线设计  

Design of a Slot-Loaded Low-Profile Dual-Frequency Antenna for Beidou System

作　　者：李锐雄 林福民[1] 李晓鹏 张华福 LI Rui-xiong;LIN Fu-min;LI Xiao-peng;ZHANG Hua-fu(School of Physics and Optoelectronic Engineering,Guangdong University of Technology,Guangzhou,Guangdong 510006,China;Hi-Target Surveying Instrument Co.,Ltd.,Guangzhou,Guangdong 511400,China)

机构地区：[1]广东工业大学物理与光电工程学院,广东广州510006 [2]广州中海达卫星导航技术股份有限公司,广东广州511400

出　　处：《电子学报》2024年第8期2679-2687,共9页Acta Electronica Sinica

摘　　要：本文设计了一款应用于北斗系统(BeiDou System,BDS)的新型低剖面双频段贴片天线.该天线基于单层贴片天线结构,通过“桥形”缝隙加载的方式,引入新的谐振频率,使天线工作在双频段(分别以1176 MHz和1575 MHz为中心频点),实现共面双频辐射.同时加载4个环形缝隙,仅用一组馈电针进行耦合馈电,方便调节阻抗匹配,同时减少馈电针数量,简化馈电网络复杂性.另外在天线侧面加载“π型”金属枝节,进一步优化高频阻抗匹配.实测结果表明,该天线在B1C频段和B2a频段的增益大于3.5 dBic,轴比均小于3 dB.频谱显示,该天线能工作于北斗系统的B1C、B2a频段,有望应用于北斗定位系统终端设备.A new low-profile dual-band patch antenna for BeiDou system(BDS)applications is designed in this pa⁃per.The antenna is based on a single-layer patch antenna structure,and a new resonant frequency is introduced through loading“bridge-type”gaps,so that the antenna operates in dual frequency bands(resonant at 1176 MHz and 1575 MHz,respectively),realizing coplanar dual-frequency radiation.Meanwhile,four annular gaps are loaded and only one set of feed⁃ing pins is used for coupled feeding,which contributes to adjust impedance matching while reducing the number of feeding pins and simplifying the feeding network.In addition,“πtype”metal branches are installed on the side of the antenna to further optimize impedance matching in high frequency band.The measured results show that the gain of the antenna is greater than 3.5 dBic in both the B1C band and B2a band,and the axial ratio are less than 3 dB in the above frequency bands.The spectrum shows that the developed antenna operates in the B1C and B2a frequency bands of Beidou system,and is expected to be applied to the terminal equipments of Beidou positioning system.

关 键 词：贴片天线 双频 缝隙加载 北斗系统 低剖面 

分 类 号：TN828.5[电子电信—信息与通信工程]