Simulating of electromagnetic scattering from a structure consisting of an impedance and a magnetodielectric bodies

The problem of electromagnetic scattering from a structure consisting of impedance and magnetodielectric bodies is solved in the resonance frequency range by means of the discrete sources method. The gist of the used method is the following. The unknown scattered field in the outer medium is represented as a sum of the fields of auxiliary elementary electric dipoles located on the auxiliary surfaces introduced inside each body. The form of auxiliary surface is similar to the form of body's surface, and electric dipoles are oriented tangentially to the auxiliary surfaces. The unknown field inside of a magnetodielectric body is represented as a sum of the fields of auxiliary elementary electric dipoles located on the auxiliary surfaces, which enclose a magnetodielectric bodies. The form of auxiliary surface is similar to the surface form of a magnetodielectric body, and dipoles are oriented tangentially to the auxiliary surface. The chosen representations of the fields satisfy to Maxwell's equations and radiation conditions. To find the unknown dipole moments of the auxiliary dipoles, we use the boundary conditions on the surfaces of the impedance and magnetodielectric bodies. The above method we have implemented as a computer software for calculating the scattered-field components. We present some results concerning the influence of structure form's deviations from the axisymmetric form on the scattering cross-section.

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