A single-source surface integral equation formulation for composite dielectric objects

This paper presents a single-source equivalence formulation to solve for the scattering from composite dielectric objects. In the proposed formulation, all regions of the composite dielectric object are replaced by the surrounding free space medium and an equivalent electric current density on their boundary. Since the formulation only uses a single equivalent current source, it requires 4 times less memory storage than the PMCHWT formulation, and could result in up to 8 times faster solution time.