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Constitutive parameters extraction for thin two-dimensional cylinders based on scattering field measurements

机译：基于散射场测量的薄二维圆柱本构参数提取

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摘要

This study presents an analytical method for extracting the constitutive parameters of an isotropic two-dimensional magneto-dielectric thin cylinder (small radius compared with the wavelength). The method is based on the scattered far field information to a plane wave illumination. Three variations of the method are presented. First, the complex monostatic scattered fields of two orthogonal polarisations are used to extract the complex constitutive parameters (permittivity and permeability) of a lossy cylinder. Second, the complex bistatic and monostatic scattered fields for a single polarisation are used to extract the complex permittivity and permeability. Third, the absolute value of the monostatic radar cross section for two orthogonal polarisations is used to extract the complex permittivity or permeability. An approximation for a small argument is used to obtain a simple polynomial expression for the scattered field to extract the constitutive parameters. Numerical examples to validate the proposed extraction methods are shown and the results are satisfactory.
机译：这项研究提出了一种分析方法，用于提取各向同性的二维磁电介质薄圆柱体（与波长相比半径较小）的本构参数。该方法基于散射的远场信息到平面波照明。介绍了该方法的三个变体。首先，使用两个正交极化的复杂单静态散射场来提取有损圆柱体的复杂本构参数（介电常数和磁导率）。其次，使用单极化的复双基地和单基地散射场来提取复介电常数和磁导率。第三，用于两个正交极化的单站雷达横截面的绝对值用于提取复介电常数或磁导率。使用小参数的近似值可获取散射场的简单多项式表达式，以提取本构参数。数值算例验证了所提出的提取方法，结果令人满意。

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