侧面加载金属带的宽频带卫星导航天线  

Broadband satellite navigation antenna with metal strips loaded on the side

作　　者：王敬杰 袁家德[1] WANG Jingjie;YUAN Jiade(College of Physics and Information Engineering,Fuzhou University,Fuzhou 350116,China)

机构地区：[1]福州大学物理与信息工程学院,福州350116

出　　处：《电波科学学报》2023年第2期292-297,共6页Chinese Journal of Radio Science

基　　金：国家自然科学基金(62071125);福州市科技创新平台项目(2021-P-029)。

摘　　要：文中提出了一种应用于卫星导航的宽频带天线,其由一对交叉偶极子臂、侧面加载金属带和底部接地面组成.采用侧面加载金属带可以有效提升轴比(axial ratio,AR)带宽和阻抗带宽,并且有效减小天线尺寸.实测结果表明|S_(11)|≤-10 dB的阻抗带宽为1.06~2.01 GHz,AR≤3 dB的AR带宽为1.11~1.95 GHz,在北斗B1、B2和B3中心频率处的增益分别为4.62 dBi、5.34 dBi和5.21 dBi.本文提出的交叉偶极子天线不需要复杂的馈电网络,具有天线结构简单、体积小、工作频带宽等优势,可较好地应用于北斗卫星导航终端设备中.A broadband antenna for satellite navigation terminal is proposed.The antenna is composed of a pair of cross dipole arms,the side loaded metal strips and a bottom ground.The side loaded metal strips can help to improve the axial ratio(AR)bandwidth and impedance bandwidth of the antenna,and reduce the size of the overall antenna.The measured results show that the impedance bandwidth of|S_(11)|≤−10 dB is 1.06−2.01 GHz,AR bandwidth of AR≤3 dB is 1.11−1.95 GHz,and the gains at the center frequency of BeiDou B1,B2 and B3 are 4.62,5.34 and 5.21 dBi,respectively.The cross dipole antenna proposed in this paper does not need complex feed network,and has the advantages of simple antenna structure,miniaturization and wide band.It can be better applied in BeiDou satellite navigation terminal.

关 键 词：北斗卫星导航系统(BDS) 交叉偶极子天线 圆极化 宽频带 轴比带宽 阻抗带宽 

分 类 号：TN967.1[电子电信—信号与信息处理]