一种有效的子阵级波束扫描旁瓣抑制方法  

Effective side lobe suppression approach for beam scanning at sub-array level

作　　者：胡航[1] 刘伟会[1] 吴群[1] 肖勇 

机构地区：[1]哈尔滨工业大学电子与信息技术研究院,黑龙江哈尔滨150001 [2]毫米波/亚毫米波末制导技术国防科技重点实验室,北京100854

出　　处：《电波科学学报》2009年第4期593-597,666,共6页Chinese Journal of Radio Science

基　　金：中国博士后科学基金资助项目(20080430905);航天支撑基金项目

摘　　要：在子阵级数字波束扫描中,方向图的旁瓣抑制是一个重要问题。分析了子阵级波束扫描的方向图特性。基于正态分布的期望子阵方向图来构造加权网络,得到了旁瓣很低的新子阵方向图,较好地抑制了子阵级波束扫描的方向图旁瓣;与基于理想空域滤波器的期望子阵方向图方法相比,显著改善了旁瓣抑制效果。仿真结果证明了所提出方法的有效性。For sub-array level digital beam scanning, the side lobe suppression of pattern is a critical problem. The pattern characteristics for beam scanning at subarray level are analyzed. The weighting network is constructed based on desired sub-array patterns with normal distribution. Consequently, the new sub-array patterns with low side lobe are obtained. For sub-array level beam scanning, the proposed approach could reduce side lobe effectively. Compared with the desired subarray pattern based on the ideal space-domain filter, our approach improves the side lobe suppression performance remarkably. Simulation results demonstrate its validity.

关 键 词：子阵级波束扫描 旁瓣抑制 正态分布子阵方向图 加权网络 

分 类 号：TN957.51[电子电信—信号与信息处理] TN911.7[电子电信—信息与通信工程]