A P-FFT Fast Solution to the EM Scattering from Composite Metallic-Dielectric Objects

To analyze the scattering problem of arbitrarily shaped composite metallic-dielectric objects, the method of moments is used to convert the volume-surface integral equation （VSIE） into linear equations, and then the precorrected-FFT （P-FUF） method is used to solve the equations. To reduce near-zone interactions to be computed directly and to be precor- rected, an improved stencil topology is presented. Numerical results show that the P-FFT method based on VSIE can solve the scattering problem of composite metallic-dielectric objects efficiently and accurately, and the improved stencil topology can significantly reduce near-zone interactions, as well as memory and CPU time.