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针对飞行器表面存在的多列缺陷目标,基于电磁场叠加理论,提出并推导了用于分析多列电磁缺陷目标的散射相干原理,并以此为基础,建立了多列缺陷目标散射机理的研究方法;提出了间距电尺寸的概念,系列雷达散射截面实验表明,散射相干原理可用来精确分析不同类型多列缺陷目标的散射机理,间距电尺寸决定散射分布的形式,对多列缺陷目标散射有重要影响,而不同的缺陷类型主要影响散射幅值大小;从相干原理出发,结合精确数值算法,提出了多列缺陷目标的快速预估方法,具有与多层快速多极子算法一致的精度,且几乎不占用计算内存和时间。
Based on the theory of superposition of electromagnetic fields, a scattering coherence principle is proposed and deduced for the target of multi-row electromagnetic defects. Based on this, a research method of multi-row target scattering mechanism is established. A series of radar cross-section experiments have been carried out. Experiments show that the scattering coherence principle can be used to accurately analyze the scattering mechanism of different types of multi-row defects, and the size of the dispersion determines the scattering distribution, which has an important effect on the scattering of multiple columns of defects , And different types of defects mainly affect the magnitude of the scattering amplitude. Based on the principle of coherence, combined with the precise numerical algorithm, a fast prediction method for multi-row defect targets is proposed, which has the same accuracy with the multi-layer fast multipole algorithm and almost Does not take up memory and time.