采用DFP-BFGS变尺度算法优化分析了非周期八角阵的子阵中心位置,使栅瓣得到抑制,且阵列的辐射特性达到良好的效果。由于阵列辐射单元之间间距选取大于1个波长,天线方向图必定有栅瓣出现,所以,选择优化子阵中心位置,分散栅瓣能量,使周期八角阵变形为非周期八角阵布阵形式。若该阵列采用高效阵列单元,就可以实现有限相控扫描,且可以获得更低的副瓣要求。

An octagonal aperiodic array is introduced by optimizing central location of large spacing's subarrays using DFP-BFGS algorithm to obtain the outstanding radiation characteristic. The grating lobes are bound to appear for far-field radiation pattern because of large spacing(larger than a wavelength) among elements, and we could select to optimize central location of subarrays to make sidelobes' power scattered, and covert octagonal array into the aperiodic. If this array uses high efficiency elements, it would have achieved limited scan for phased antenna and obtained lower side lobes.