摘要
The volume-surface integral equation(VSIE) ,the surface integral equation(SIE) and the volume integral equation(VIE) of EM scattering problem are converted into linear equations with the method of moment,then the precorrected-FFT method is used to solve the linear equations.To overcome the drawback of conventional stencil topology,two kinds of improved stencil topology,stencil topology B and stencil topology C,are presented,and the construction and actual performance of the three kinds of stencil topology are compared.Numerical results show that good agreement is observed between the P-FFT solutions combined with each of the three kinds of stencil topology and the standard solutions.Stencil B can significantly reduce the number of near-zone precorrections.Stencil C potentially holds for parallel multilevel P-FFT since grid overlapping never occurs between any stencils.
The volume-surface integral equation （VSIE）, the surface integral equation （SIE） and the volume integral equation （VIE） of EM scattering problem are converted into linear equations with the method of moment, then the precorrected-FFT method is used to solve the linear equations. To overcome the drawback of conventional stencil topology, two kinds of improved stencil topology, stencil topology B and stencil topology C, are presented, and the construction and actual performance of the three kinds of stencil topology are compared. Numerical results show that good agreement is observed between the P-FFT solutions combined with each of the three kinds of stencil topology and the standard solutions. Stencil B can significantly reduce the number of near-zone precorrections. Stencil C potentially holds for parallel multilevel P-FFT since grid overlapping never occurs between any stencils.
