The 3-D algorithm of solving the EFIE using face-centered node points, CGM and FFT

It has been known for a long time that the accuracy of solving the scattering by a dielectric body using the electric field integral equation is poor, when the permittivity of the scatterer becomes large. Recently, such a trouble has been settled by using a procedure involving face-centered node points. Such a procedure is efficient, since it preserves the convolution property in the EFIE and, hence, the applicability of the FFT. The author generalizes this procedure to the three-dimensional and anisotropic case