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首页> 外文期刊>Journal of the Optical Society of America, A. Optics, image science, and vision >Electromagnetic scattering from cylindrical objects above a conductive surface using a hybrid finite-element-surface integral equation method
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Electromagnetic scattering from cylindrical objects above a conductive surface using a hybrid finite-element-surface integral equation method

机译：混合有限元表面积分方程法从导电表面上方的圆柱物体产生电磁散射

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摘要

This work presents a novel finite-element solution to the problem of scattering from a finite and an infinite array of cylindrical objects with arbitrary shapes and materials over perfectly conducting ground planes. The formulation is based on using the surface integral equation with Green's function of the first or second kind as a boundary constraint. The solution region is divided into interior regions containing the cylindrical objects and the region exterior to all the objects. The finite-element formulation is applied inside the interior regions to derive a linear system of equations associated with nodal field values. Using two-boundary formulation, the surface integral equation is then applied at the truncation boundary as a boundary constraint to connect nodes on the boundaries to interior nodes. The technique presented here is highly efficient in terms of computing resources, versatile, and accurate in comparison with previously published methods. The near and far fields are generated for a finite and an infinite array of objects. While the surface integral equation in combination with the finite-element method was applied before to the problem of scattering from objects in free space, the application of the method to the important problem of scattering from objects above infinite flat ground planes is presented here for the first time, to our knowledge.
机译：这项工作提出了一种新颖的有限元解决方案，以解决从具有无限形状和材料的圆柱物体的无限和无限阵列在完美导电的地平面上散射的问题。该公式是基于使用具有第一类或第二类格林函数的表面积分方程作为边界约束的。溶液区域分为内部区域和内部区域，该内部区域包含圆柱对象和所有对象外部的区域。在内部区域内部应用有限元公式，以得出与节点场值相关的线性方程组。使用二边界公式，然后将表面积分方程应用于截断边界作为边界约束，以将边界上的节点连接到内部节点。与以前发布的方法相比，此处介绍的技术在计算资源方面非常高效，通用且准确。将为对象的有限和无限阵列生成近场和远场。虽然之前将表面积分方程与有限元方法结合使用来解决自由空间中物体散射的问题，但在此介绍了该方法在无限平面平面上物体散射的重要问题中的应用。第一次，据我们所知。

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