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摘要: 无规排列功率谱与其单元功率谱的比值被称为干涉因子。根据统计数据实验,研究了干涉因子的精细结构,提出了受抑无规行走概念,给出了与干涉因子取值从N2降为N所对应的有序孔径角公式。公式表明,有序孔径角与随机点源数目N值无关,与随机点分布区间有反比关系,其数值几倍于规则排列功率谱的角宽度。
Abstract: The ratio of the power spectra of random array to whose unit is called the coherent factor. By analyzing the statistical data experiment of ours, we have studied the fine structures of the curves of coherent factor, introduced a new concept, namely the limited random walk; and found out the formula of the ordered aperture angle for which the values of coherent factor take from N2 to N. This formula has shown that the angle is inversely propertional to the dimension of random array, but is indeperdent of the total number of random points, and that the angle is several times as large as that of the power spectra of regular array in the same domain.