针对非周期大间距矩形阵列,运用遗传算法对其进行优化布阵和幅度加权,得到各阵元最佳的位置和幅度分布,使 得阵列扫描范围内的副瓣电平最低。研究了阵元间距、阵列扫描范围、单元天线波束宽度等3种因素对阵列副瓣电平和 增益的影响,得到了各因素对阵列辐射性能影响的规律。通过遗传算法优化得到了扫描范围内副瓣电平最低时的阵元间 距,可用于指导工程设计。

The genetic algorithm(GA) is used for optimal analysis on the element position and current amplitude of aperiodic array with elements arranging in large space, and the optimal parameters are achieved, which make the side lobe level minimum in the scanned area. The effect of element spacing, scanned area and element beam-width on side lobe level and gain of aperiodic array antenna is discussed, and the effects of these factors on radiation performance are given. The element spacings when side lobe level in the scanned area is minimum are acquired by GA optimization, that is used to guide the design.