一种均匀加权线阵的阵元位置优化方法  

An Optimum Method for The Element Placement of Uniformly Weighted Linear Arrays

作　　者：蒋毅[1] 张曙[1] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《自动化技术与应用》2013年第4期47-50,共4页Techniques of Automation and Applications

摘　　要：等间距排列的均匀加权线阵,其峰值旁瓣电平过高,不能在工程中直接使用。为降低其峰值旁瓣电平,提出了一种对其阵元位置进行优化的算法。根据FIR滤波器线性相位条件推导了均匀加权线阵中各个阵元位置应满足的条件,利用该条件并让其归一化方向图与等间距加权线阵的归一化方向图等效,最终得到了均匀加权线阵的阵元位置。仿真结果显示,该等效方法可以得到较低的峰值旁瓣电平。而且对于阵元数目为奇数或偶数的线阵均能起到良好的优化作用,对于实际工程具有一定的参考价值。Equally arranged linear arrays with uniformly weighted amplitude lead to a high peak-sidelobe, it cannot be directly applied in the engineering. In order to reduce the peak-sidelobe level, this article proposes a new method for the element placement optimization of the lineal＂ arrays with unitbrmly weighted amplitude. According to the requiremems for the linear phase of a FIR filter, this paper derives the requirements for element position of uniformly weighted linear arrays, and by utilizing the equivalent of equally arranged linear arrays with amplitude taper in normalized beam pattern, element position of uniformly weighted linear arrays can be achieved. Simulation results show that this new approach can obtain the element position of uniformly weighted linear arrays with low peak-sidelobe. Moreover, this method can applied to both linear arrays with even or odd number elements, and is valuable to the engineering applications.

关 键 词：天线阵列 线阵 均匀加权 FIR滤波器 线性相位 低旁瓣 

分 类 号：TN820[电子电信—信息与通信工程]