基于重叠复合线列阵的幅度加权指向性研究  

Research of amplitude weighting based on overlapping multiple line array

作　　者：关迪聆 张承云[1] 梁龙腾 杨广权[1] 陈东 Guan Diling;Zhang Chengyun;Liang Longteng;Yang Guangquan;Chen Dong(School of Mechanical and Electrics Engineering,Guangzhou University,Guangzhou 510006,China)

机构地区：[1]广州大学机械与电气工程学院

出　　处：《电子测量技术》2018年第17期26-31,共6页Electronic Measurement Technology

基　　金：广州市信息处理与传输重点实验室(201605030014);广东灯光与声视频工程技术研究中心(GCZX-A1407);广东省现代视听信息工程技术研究中心开放研究基金项目资助

摘　　要：在声呐系统中,通常希望换能器基阵的发射或者接收波束具有较低的旁瓣,一般采用幅度加权的方式实现。将线列阵划分为部分阵元重叠的二级复合阵,再根据各子阵等效阵元幅度加权系数的分布形式,利用卷积公式计算出各阵元最终的加权系数,并对其产生的指向性进行研究。经仿真实验分析发现,在阵元数目较多时,适当地将线列阵划分为重叠复合阵再设计加权系数,可以使旁瓣总功率更低,使基阵发射或者接收的能量更加集中,为水声换能器基阵波束设计提供参考。It is expected that the transmitting or receiving beam of the transducer array has low side lobes in the sonar system,and it can be achieve by the methor of amplitude weighting.The linear array is divided into two sub-arrays with overlapping elements and it＇s amplitude weighted coefficients are calculated by the convolution formula according to the distribution of amplitude weighting coefficients of each sub-array equivalent array element,which have been studied it＇s directivity in this paper.The simulation analysis have shown that when the number of array elements is large,the weighting coefficients obtained by the way of dividing the line array into overlapping multiple-array properly can make the total power of the sidelobes lower so that the energy which transmitted or received by the array are more concentrated,providing a reference for the design of beam of the hydroacoustic transducer array.

关 键 词：线列阵 幅度加权 波束宽度 旁瓣级 

分 类 号：TN929.3[电子电信—通信与信息系统]