Finite Element Method with Absorbing Boundary Condition (FEM-ABC) Applied to Electromagnetic Scattering Problems

Luciano S. Barbosa, Márcio M. Afonso, Marco A. O. Schroeder, Eduardo H.R. Coppoli


This article deals with the application of Finite Element Method (FEM) to a twodimensional electromagnetic scattering problem. The radar operation for detect submarines and aircraft is just one of many applications of this phenomenon in engineering. The FEM allows the treatment of geometrically complex structures containing non-homogeneous materials. Furthermore, it generates sparse matrices, which allows great computational economy. To be applied to scattering problems, the FEM requires a radiation condition incorporated into the formulation. This work uses an Absorbing Boundary Condition (ABC), which preserves the characteristics of the matrix. This choice gives results in agreement with the analytic solution. The error and sensitivity analysis are evaluated.

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