为改善有源相控阵费效比,增大单元间距、减少有源通道数量是一种较好的设计方式,但是增大单元间距又会引入不必要的栅瓣.文中对几种易于工程化的子阵级非周期排布方法进行研究,考虑单元因子的影响后,仿真分析了合成方向图特性,比较了不同方法的栅瓣抑制效果.
Reducing the number of active channels by enlarging inter-element spacing is an efficient way to make active phased array antennas cost-effective.However,electrically large inter-element spacing results in the occurrence of grating lobes,which will degrade the antenna performance.Several aperiodic sub-array arrangement methods used in practical applications are studied.Taking the element factor into consideration,synthesized array patterns are analyzed and grating-lobe suppression effects are compared.