A Novel Green’s Function Analysis of Wave Scattering by an Infinite Grating using Complex Images Technique
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A Novel Green’s Function Analysis of Wave Scattering by an Infinite Grating using Complex Images TechniqueAbstract
A new method, based on the complex images technique is presented for solving the electromagnetic scattering from the infinite metallic and dielectric gratings. The main idea of this method lies in representing the infinite summation of the structure period Green's functions in terms of finite summations of complex images. The method of moments (MoM) is then employed to find the current distribution, reflection and transmission coefficients of the gratings. The validity of the presented method is shown through various examples for different grating geometries and incident wave polarizations. Fast convergence, simple formulations and flexibility of the method in analyzing different structures are the main advantages of the proposed method.
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