P. Vincent et al., RIGOROUS COMPUTATION OF THE NEAR-FIELD DIFFRACTED BY A CYLINDER FROM DIPOLE SOURCES, IEEE transactions on magnetics, 31(3), 1995, pp. 1614-1617
A spectral representation of the incident field and a rigorous integra
l theory are used. The accuracy of the method results both from an eff
icient extraction of the singularities of the kernels and from the use
of a complex path integral away from singularities representing guide
d modes and irregular frequencies. Numerical examples are given.