This chapter extends the application of the theory of the radial basis
function method to computational electromagnetics. Several key mechanical issues
involved in the process of high-precision calculation of electromagnetic scattering are
discussed. A regularized method of moments based on the modified fundamental
solution of the three-dimensional Helmholtz equation is constructed in this chapter.
The origin intensity factor is used to evaluate the singular term of interpolation matrix.
Non-uniqueness at internal resonance is avoided by using the modified fundamental
solution as the basis function. The regularized method of moments reduces the
consumed CPU time by half compared to the traditional method of moments, while
stability and accuracy are not affected. Experiments indicate that the regularized
method of moments can accurately evaluate the radar cross section of perfect
conducting scatter over all frequency ranges.
Keywords: Electric field integral equation; Radar cross section; Method of
moments; Modified fundamental solution.
