相控阵的子阵级数字波束扫描方法研究  

Study on digital beam scanning method at subarray level for phased array

作　　者：胡航[1] 宗成阁[1] 刘伟会[1] 吴群[1] 

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

出　　处：《系统工程与电子技术》2009年第4期733-736,共4页Systems Engineering and Electronics

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

摘　　要：在子阵级相控阵中,对于多波束形成等很多应用,需要在子阵级进行数字波束扫描。此时抑制扫描后的方向图旁瓣是一个重要问题。基于具有圆形投影区域的期望子阵方向图,构造了子阵级加权网络,通过对子阵输出进行后处理得到了新的子阵方向图,从而抑制了子阵级波束扫描的方向图旁瓣。该方法与基于矩形投影区域的期望子阵方向图方法相比,提高了子阵级波束扫描的旁瓣抑制性能。仿真结果验证了理论分析的有效性。In subarray level phased array, it requires digital beam scanning at subarray level in many applications, for instance, multiple beamforming. In this case, the suppression of pattern sidelobe is critical. Based on the desired subarray pattern with circular projection area, the weighting network has been constructed. Consequently, new subarray patterns are obtained by post-processing the subarray outputs, thereby the pattern sidelobe suppression is realized for subarray level scan. Compared with the method based on desired subarray pattern with rectangular projection area, the introduced method improves the sidelobe suppression performances. Simulation results demonstrate the validity of the theoretical analyses.

关 键 词：子阵级扫描 波束扫描 旁瓣抑制 加权网络 平面相控阵 

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]