  Using the traditional surface integral methods, the computation of scattering
from a dielectric object requires two equivalent current densities on the
boundary of the dielectric. In this paper, we present an approach that requires
only a single current density. Our method is based on a surface admittance
operator and is applicable to dielectric bodies of arbitrary shape. The
formulation results in four times lower memory consumption and up to eight
times lower time to solve the linear system than the traditional PMCHWT
formulation. Numerical results demonstrate that the proposed technique is as
accurate as the PMCHWT formulation.
