小型化双环型卫星导航终端天线  

A compact dual ring satellite navigation terminal antenna

作　　者：黄展博 袁家德[1] HUANG Zhanbo;YUAN Jiade(College of Physics and Information Engineering,Fuzhou University,Fuzhou,Fujian 350108,China)

机构地区：[1]福州大学物理与信息工程学院,福建福州350108

出　　处：《福州大学学报（自然科学版）》2024年第6期674-680,共7页Journal of Fuzhou University(Natural Science Edition)

基　　金：福建省高校产学合作资助项目(2023H6004);福州市科技重大资助项目(2022-ZD-002)。

摘　　要：提出一种应用于卫星导航终端的小型化双环型偶极子天线.天线由一对开口环形偶极子臂、底部反射平面和侧面栅栏组成.通过不对称环形偶极子臂上电流产生的远场电场周期性叠加或抵消,使天线远场电场方向逆时针旋转,实现右旋圆极化辐射.同时,通过在侧面加载弯折的短路栅栏,改善天线的增益方向图和工作带宽.天线整体尺寸为45 mm×45 mm×23 mm.实测结果表明,|S_(11)|≤-10 dB的阻抗带宽为1.35~1.63 GHz,轴比(R_(A))≤3 dB的带宽为1.41~1.69 GHz,在北斗B_1频点的右旋圆极化增益为4.03 dBi.相较于传统的圆极化天线,所提出的天线尺寸较小、结构简单、易于加工,具有良好的带宽和增益,在卫星导航终端设备上具有较好的应用前景.A compact dual ring dipole antenna for satellite navigation application is proposed.The antenna consists of a dual open-ring dipole,a bottom reflective plane and a side fence.By designing an asymmetric dipole arm,the far-field electric fields generated by currents on the two dipole arms periodically superimpose or cancel each other at different time,resulting in a counterclockwise rotation of the far-field electric field,and ultimately generating the right-handed circular polarization radiation.By loading bent short-circuit fence on the side,the gain pattern and operating bandwidth of the antenna were improved.The overall size of the antenna is 45 mm×45 mm×23 mm,the measured results show that the impedance bandwidth of|S_(11)|≤-10 dB is from 1.35 to 1.63 GHz,and the axial ratio(R_(A))bandwidth of less than 3 dB is from 1.41 to 1.69 GHz.The right-handed circular polarization gain at the Beidou B1 frequency point is 4.03 dBi.The proposed antenna has some advantages than traditional circularly polarized antenna,such as a small size,a simple structure,easy to manufacture,and good bandwidth and gain,which is suitable to be used in satellite navigation terminal.

关 键 词：卫星导航 环形结构 不对称结构 偶极子天线 圆极化天线 

分 类 号：TN827.4[电子电信—信息与通信工程]