高隔离度双极化微带天线直线阵的设计

本文介绍一种新型的1×16双极化微带天线直线阵的设计.该天线采用双极化角馈方形贴片单元,阵列的垂直极化端口采用共面馈电,水平极化端口采用口径耦合,并在馈电网络中应用反相馈电技术.实验结果表明,天线二端口驻波比小于1.5的相对带宽分别达到15％和13.5％,两端口之间的隔离度在频带内高于33dB,最大达到43dB.本直线阵可用作星载综合口径雷达系统的天线子阵,便于与有源收发器件结合.

Design of a Dual-Polarized Linear Microstrip Antenna Array with High Isolation

The design of a novel 1×16 dual-polarized linear microstrip antenna array is introduced.The element is the dual-polarized corner-fed square patch,while the vertical polarization port of the array is fed with a coplanar feed,and its horizontal polarization port is fed with the aperture-coupled feed.In addition,the pair-wise anti-phase feeding technique is used in both feed networks.The experimental results show that the bandwidths of VSWR＜1.5 reach 15% and 13.5% for the two ports,respectively,and the isolation between the dual polarized ports is better than 33dB within the operating bandwidth,whose maximum reaches 43dB.This linear array can be used as a sub-array of spaceborne synthetic aperture radar (SAR) system by connecting it with the active transmitter/receiver (T/R) components.