Discretization of the electric-magnetic field integral equation with the divergence Taylor-Orthogonal basis functions free from the magnetic-field and the electric-field low-frequency breakdowns

摘要

The discretization of the Electric-Magnetic Field Integral Equation (EMFIE) with the divergence Taylor-Orthogonal basis functions (div-TO) mitigates the observed discrepancy in the computed RCS for sharp-edged objects of the RWG-discretization of the Magnetic-Field Integral Equation (MFIE) with respect to the Electric-Field Integral Equation (EFIE). The EMFIE is derived from the application of the normal-electric and the tangential-magnetic boundary conditions at the surface of the body. The div-TO discretization of the EMFIE in the very low frequency regime shows huge inaccuracies in the computed RCS due to breakdowns arising from both the magnetic-field and the electric-field contributions. In this paper, we present an implementation of the EMFIE with the div-TO basis functions free from these failures in the low frequency regime.