Time domain formulation of the method of moments for inhomogeneous conductive bodies at low frequencies

This paper discusses a novel time-domain formulation of the method of moments. The proposed approach utilizes divergence-free rotational basis functions to describe the electric field integral equation in terms of a divergence-free vector quantity. The presented transient formulation can efficiently be implemented under certain simplifying conditions that depend on the choice of conductivity, time step size, and dielectric media properties. The method is tested by comparing the numerical predictions with the Mie series solution for plane wave scattering by a dielectric sphere.