一种贴片阵列天线散射减缩的新技术  

New technology for radar cross section reduction of patch array antenna

作　　者：袁宏伟[1] 龚书喜[1] 张鹏飞[1] 王文涛[1] 

机构地区：[1]西安电子科技大学天线与微波技术重点实验室,陕西西安710071

出　　处：《电波科学学报》2009年第5期899-903,938,共6页Chinese Journal of Radio Science

基　　金：国家自然科学基金资助项目(60801042)

摘　　要：引入贴片天线单元渐变开槽的方式来设计低散射阵列天线。通过对不同的单元开不同尺寸的槽,在等幅度馈电的情况下实现远区辐射场的低副瓣特性。对开槽贴片单元进行散射减缩预估,然后将该方法应用于1×9渐变开槽贴片阵列的设计中,与传统阵列天线的单元形式完全一样,采用不等幅馈电实现泰勒远区辐射场相比,该方法不仅实现了远区辐射场的低副瓣,而且实现了天线模式项散射场的低副瓣,同时又兼顾了结构模式项散射场的散射减缩,从而有效地实现了阵列天线的低散射特性。测量结果与原始阵列进行比较,证明了该方法的有效性。Using gradual changed cutting slots on the different patch antenna elements is introduced to design low radar cross section array antenna, which can achieve low-sidelobe radiation patterns in the case of the average excitation. Compared with conventional patch antenna array which has the same patch element and uses the unaverage excitation to achieve low-sidelobe radiation patterns, the novel one not only can have low-sidelobe radiation patterns, but also achieve the low-sidelobe of the antenna mode scattering field and reduce the structural mode radar cross section of the array antenna. So the low radar cross section characteristic of the array antenna can be obtained. Radar cross section reduction of the patch elements is predicted firstly. Then a 1× 9 patch array antenna is designed using both this novel technology and the conventional one. The measure results indicate the novel design may obtain low radar cross section characteristic and keep the low-sidelobe radiation patterns.

关 键 词：贴片天线 开槽 散射 雷达散射截面 

分 类 号：TN821.8[电子电信—信息与通信工程]