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.

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