分布式阵列方向图设计与栅瓣抑制方法研究

针对分布式阵列栅瓣抑制问题，提出了基于非周期阵列和随机阵列的分布式阵列方向图设计方法。首先，利用 Minimax 优化方法对子阵的边界进行优化并获取子阵最优位置参数， 实现分布式子阵随机优化布阵，从而消除阵列的周期性并最大限度地抑制栅瓣；其次，采用角度旋转的方式来消除分布式子阵之间的周期性，使得在方向图优化设计时能够避免栅瓣的累积叠加， 达到抑制栅瓣的目的。仿真分析结果表明，所述方法能够有效抑制分布式阵列的栅瓣，获得无栅瓣影响的分布式阵列方向图。

Research of Pattern Design and Grating Lobe Suppression for Distributed Array

For the grating lobe suppression problem of distributed array, pattern design methods based on the ideas of aperiodic and random arrays are proposed. Firstly, Minimax optimization method is used to optimize the boundaries of distributed subarrays, and then the optimal parameters of the sub-array position are obtained, this will help to optimize the distribution of the random array, so as to eliminate the periodicity of the array and suppress the grating lobes in a maximum level. Secondly, the method of angular rotation is used to eliminate the periodicity between distributed subarrays, so that the accumulative superposition of the grating lobe can be avoided in the optimal design of the direction pattern. Simulation results show that the proposed methods can effectively suppress the grating lobes and obtain the distributed array pattern without grating lobe.