A 2-D differential surface admittance operator for combined magnetic and dielectric contrast

In this paper, we present a novel technique to accurately model scattering phenomena at two-dimensional circular and rectangular structures consisting of arbitrary homogeneous materials, including magnetic media in particular. The proposed formalism utilizes differential surface admittance operator, which invokes single source equivalence theorem replace the inside material by its surrounding medium, while introducing an equivalent current density. contrast can be combined with electrical conductivity. As such, skin effect is rigorously taken into account, making our method ideally suited for broadband modeling good conductors as well. It demonstrated that appropriate choice basis functions discretized problem critical obtain convergent result when introduced. analytically validated case cylinder additional numerical results illustrate correctness (combinations of) cylinders, through comparison Poggio-Miller-Chan-Harrington-Wu-Tsai approach, volume integral equation commercial solver.