上海大学学报(自然科学版)

• 通信与信息工程 • 上一篇    下一篇

高隔离度的双极化口径耦合微带单元与阵列天线

梁仙灵;钟顺时;汪伟   

  1. 上海大学 通信与信息工程学院,上海 200072
  • 收稿日期:2006-03-07 出版日期:2007-02-28 发布日期:2007-02-28

Dual Polarization Aperture Coupled Microstrip Element and Array Antenna with High Isolation

LIANG Xian ling;ZHONG Shun shi;WANG Wei   

  1. School of Communication and Information Engineering, Shanghai University, Shanghai 200072, China
  • Received:2006-03-07 Online:2007-02-28 Published:2007-02-28

摘要: 提出一种新型的双极化微带贴片单元与其阵列设计,该单元采用一对相互垂直的“H”形缝隙作口径耦合馈电,获得了良好的端口隔离度(在工作频带8.8~9.8 GHz内实测值大于42 dB).该结构用于SAR系统天线的子阵设计时,其网络布置较为简单.基于此设计,研制了八单元直线阵列天线,理论仿真和实验相当吻合,不但测得高的端口隔离度(>30dB),而且实测的交叉极化特性很好(<-32.5 dB).

关键词: 隔离度, 口径耦合, 双极化, 微带天线, 阵列

Abstract: A novel dual polarization microstrip patch element and its array are proposed. The element is fed through two orthogonal H shaped slots with high isolation. The measured isolation is better than 42 dB in an operation bandwidth of 8.8~9.8 GHz. As a sub array for SAR applications, the feed network of an array consisting these elements has a simple configuration. An eight element linear array has been designed and fabricated. Experimental results are in good agreement with the theory, with high isolation (>30 dB) and low cross polarization characteristics (<-32.5 dB).

Key words: aperture coupled, arrays, dual polarization, isolation, microstrip antenna