Hybrid model of electromagnetic scattering from an inhomogeneous dielectric cylinder of arbitrary cross-section

A new approach for the scattering analysis of inhomogeneous dielectric cylinder of arbitrary cross-section based on the finite element method (FEM) and boundary element method (BEM) is presented. The field outside of an inhomogeneous dielectric cylinder is represented in terms of a boundary integral equation. The solution of Helmholtz wave equation inside the inhomogenous dielectric cylinder is provided using the finite element method. By applying the boundary conditions on the outer dielectric interface between free space and the inhomogeneous dielectric cylinder, the scattering coefficient of the scattered field is obtained. The available numerical results in the literature are used to validate the accuracy of this method