一种宽带高低仰角增益的卫星导航终端天线  

An Antenna with Wide Bandwidth and High Low-Elevation Gain for Satellite Navigation Terminal

作　　者：巩若晨 袁家德[1] GONG Ruo-chen;YUAN Jia-de(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：《微波学报》2020年第4期47-50,共4页Journal of Microwaves

基　　金：福建省高校产学合作项目(2019H6007);福建省自然科学基金(2019J01638);福州市科技合作项目(2018-G-89)。

摘　　要：研究了一种宽频带高低仰角增益的卫星导航终端天线。天线由两对交叉偶极子天线臂、馈电网络和栅栏状反射腔组成;两对交叉偶极子臂分别位于水平面上和垂直面上,形成对上半空间各仰角方向上增益的有效贡献;馈电网络实现交叉偶极子馈电相位相差90°,满足天线的圆极化辐射;栅栏状反射腔实现天线的定向辐射和辅助调整天线的带宽和低仰角增益。分析了典型参数变化对天线性能的影响,测试结果表明,天线|S11|≤-10 dB的阻抗带宽1.330~1.810 GHz、轴比小于3 dB带宽为1.54~1.66 GHz和在1.561 GHz、1.575 GHz、1.602 GHz频点10°低仰角最大增益分别为0.35 dBi、0.21 dBi、0.1 dBi。该天线具有高低仰角增益,尺寸小,频带宽的特点。An antenna with wide bandwidth high low-elevation gain for satellite navigation terminal is studied.The antenna consists of two pairs of crossed dipole antenna arms,a feed network and Fence-shaped reflection cavity;two pairs of crossed dipole arms are located on the horizontal plane and the vertical plane respectively,forming an effective contribution to the gain in the elevation directions of the upper half space.The phase difference of 90°is realized by using the feed network to satisfy the circular polarization condition of antenna.Fence-shaped reflecting cavity is used to realize the directional radiation and improve the antenna bandwidth and low elevation gain.The influence of typical parameter variations on antenna performance is analyzed.The test results show that the impedance bandwidth of antenna|S11|≤-10 dB is 1.330-1.810 GHz,the axial ratio bandwidth of less than 3 dB is 1.54-1.66 GHz and the maximum gain of 10°low elevation at frequency of 1.561,1.575 and 1.602 GHz is 0.35 dBi,0.21 dBi and 0.1 dBi,respectively.The antenna has high low-elevation gain,relatively small size and wide bandwidth.

关 键 词：偶极子天线 圆极化 定向性 低仰角增益 宽频带 

分 类 号：TN967.1[电子电信—信号与信息处理] TN820[电子电信—信息与通信工程]