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For the solution of electromagnetic surface integral equation problems, a fast solver based on multilevel interpolation of the respective Green's functions is presented. Besides the commonly used electric current mixed-potential integral equation formulation (MPIE) of the electric field integral equation (EFIE), the effectiveness of a direct field formulation for very ill-conditioned low-frequency problems is shown. The superior efficiency of the presented algorithm is proved by several numerical examples.
Date of Conference: 11-15 April 2011