A. Doicu et T. Wriedt, Null-field method with discrete sources to electromagnetic scattering fromcomposite objects, OPT COMMUN, 190(1-6), 2001, pp. 13-17
A novel formulation for improving the numerical stability of the null-field
method for highly elongated and flattened composite scatterers is presente
d. The key step in this approach is to approximate the surface current dens
ities by the lowest-order multipoles located in the complex plane. The accu
racy of the proposed method is investigated from a numerical point of view.
(C) 2001 Published by Elsevier Science B.V.