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首页> 外文期刊>Microwaves, Antennas & Propagation, IET >Numerical analysis of scattering from cylindrical structures coated by layers having inhomogeneity in both radial and azimuthal directions
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Numerical analysis of scattering from cylindrical structures coated by layers having inhomogeneity in both radial and azimuthal directions

机译：径向和方位角均不均匀的圆柱涂层结构散射的数值分析

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摘要

In this study, the problem of electromagnetic scattering from cylindrical structures with multi-layered coating having inhomogeneity in both radial and azimuthal directions is investigated. The core of the structure may be perfect electric conductor, perfect magnetic conductor, perfect electromagnetic conductor, impedance surface, dielectric or metamaterial. The previous investigations have been restricted to a special case, for example, coatings with only radial inhomogeneity, normal incidence etc. Moreover, in these investigations only single layer coatings are considered and the analysis is based on modelling inhomogeneous coating by homogeneous layers. However, in this study, for the first time, electromagnetic scattering from cylindrical structures coated by multilayered inhomogeneous coating is considered in the most general case for any arbitrary number of layers, incident angle and polarisation. The analysis is based on finite difference method which is a common method in solving engineering electromagnetic problems and the inhomogeneous coating is not approximated by homogeneous layers. The validity of the proposed method is verified through some comprehensive examples. Comparing the results of the proposed method with exact solutions and the results obtained from other commonly used methods in the literature, it is confirmed that the method is simple, fast, accurate and valid for all inhomogeneous layers with continuous electromagnetic profiles.
机译：在这项研究中，研究了具有多层涂层的圆柱结构在径向和方位上均具有不均匀性的电磁散射问题。结构的核心可以是完美的电导体，完美的磁导体，完美的电磁导体，阻抗表面，电介质或超材料。先前的研究仅限于特殊情况，例如，仅具有径向不均匀性，法向入射的涂层等。此外，在这些研究中，仅考虑了单层涂层，并且该分析基于对均质层的不均匀涂层进行建模的基础。然而，在这项研究中，对于任何数量的层，入射角和极化，在最一般的情况下，首次首次考虑了由多层不均匀涂层涂覆的圆柱结构的电磁散射。该分析基于有限差分法，这是解决工程电磁问题的常用方法，并且不均匀涂层不能用均匀层来近似。通过一些综合实例验证了该方法的有效性。将提出的方法的结果与精确解与从文献中其他常用方法获得的结果进行比较，可以确认该方法对于具有连续电磁剖面的所有不均匀层都是简单，快速，准确和有效的。

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