双极化高增益电磁偶极子天线的设计  

Design of High-gain Dual-polarized Electromagnetic Dipole Antenna

作　　者：肖阳[1] 陈凯亚[1] XIAO Yang;CHEN Kai-ya(School of Physical Science and Technology,Southwest Jiaotong University,Chengdu Sichuan 610031,China)

机构地区：[1]西南交通大学电磁所,四川成都610031

出　　处：《通信技术》2020年第12期3102-3107,共6页Communications Technology

摘　　要：在基于抛物反射面的射电望远镜应用中,组成相控阵馈源阵列的单元天线应具有高增益、良好的方向图等化性以及双极化可实现等特点。通过加载八单元双层“田”字形左手材料,设计了一款工作于L波段的具有良好等化性的双极化高增益电磁偶极子天线。仿真结果表明,该天线增益达到10.3dB,极化隔离度优于-30dB,交叉极化比大于28dB。该天线可用于构成馈源阵列,提升射电望远镜的视场性能。In the application of radio telescopes based on parabolic reflectors,the unit antennas that make up the phased array feed array should have the characteristics of high gain,good pattern equalization,and realizable dual polarization.By loading an eight-unit double-layer“田”-shaped left-handed material,a dualpolarization high-gain electromagnetic dipole antenna with pattern equalization performance in the L-band is designed.The simulation results show that the antenna gain reaches 10.3dB,the polarization isolation is better than-30dB,and the cross polarization ratio is greater than 28dB.This antenna can be used to form a feed array to improve the field-of-view performance of the radio telescope.

关 键 词：电磁偶极子天线 高增益 左手材料 双极化 交叉极化 

分 类 号：TN92[电子电信—通信与信息系统]