A Study on Electromagnetic Diffraction of Slotted Conductive Strips Using the Subdomain Method

초록

Electromagnetic diffraction of slotted conductive strips is studied using the subdomain method. The subdomain method is based on the Green’s second identity, which decomposes the geometry into partially overlapping subdomains. In each subdomain, the electromagnetic fields are expressed as Fourier–Bessel series. When the field representations in the subdomains are incorporated into the original structure, discontinuities may appear at several interfaces. To address this, we introduce artificial line currents to eliminate the discontinuities. Fourier coefficients are determined by enforcing boundary conditions using the mode-matching method and the orthogonality of sinusoidal functions. To evaluate the accuracy of the subdomain method, we use the root-mean-square error of the surface current density and the bistatic scattering cross section. To assess the computational efficiency, we compare the elapsed time and allocated memory of the subdomain method with those of the finite element method. The numerical results demonstrate that the subdomain method provides solutions for the given geometry with high precision and efficiency. © 1963-2012 IEEE.

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