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基于电磁场的多尺度变换理论,得到了以导体椭圆柱为例的电磁波任意极化,任意垂直入射到目标上的散射场的解析式。将所得结果应用于计算圆柱目标的散射场,结果与文献完全一致。对椭圆柱体的散射宽度随入射波方位角,电磁波频率以及目标尺寸的变化进行了仿真。结果表明,在垂直于电磁波的方向上观测时,椭圆柱的垂直尺寸对散射有较大的影响,电磁波水平极化时散射最强。所用算法适用于介质椭圆柱等目标的散射特性研究,所得结果为目标尺寸、形状遥感电磁测量等实际应用提供了理论依据。
Based on the multi-scale transformation theory of electromagnetic field, the analytic formula of the scattering field with arbitrary polarization and arbitrary incidence perpendicular to the target is obtained. The results are applied to the calculation of the cylindrical target scattering field, the results are consistent with the literature. The scattering width of elliptical cylinder is simulated with the change of incident azimuth, electromagnetic wave frequency and target size. The results show that the vertical size of the elliptical column has a great influence on the scattering when observed in the direction perpendicular to the electromagnetic wave, and the electromagnetic wave has the highest scattering intensity in horizontal polarization. The proposed algorithm is suitable for the study of the scattering properties of elliptical columns and other targets. The obtained results provide the theoretical basis for the practical application of target size and shape sensing electromagnetic measurements.