For one-dimensional aperture synthesis microwave radiometers, the optimal placement of antenna elements in a low-redundancy linear array (LRLA) is difficult when large numbers of elements are involved. In this paper, the general structure of large LRLAs is summarized first, and then an approach using the structure to guide an optimization search is developed, which can find out optimal array configurations with low computation time. As instantiations of the approach, several analytical solutions for LRLA are further derived and they can yield various array configurations with very low redundancy in nearly zero computation time. Both the approach and the resulting configurations can be used in antenna array design in aperture synthesis microwave radiometers.%寻找大阵元数的低冗余度线阵(LRLA)排列,是一维综合孔径微波辐射计天线阵列设计的一个难点.本文在总结了低冗余度线阵排列的一般结构规律的基础上,提出了一种排列结构约束搜索的方法,能以较短的计算时间获得较优的大阵元数LRLA排列;作为该方法的应用实例,导出了多种叭排列的解析解,它们可以迅速地给出任意阵元数对应的多种LRLA排列.本文提出的方法及在此基础上得到的LRLA排列,对综合孔径辐射计的阵列设计具有参考价值.
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