G. Pelosi et al., AN FEM-BASED NUMERICAL DIFFRACTION COEFFICIENT FOR IRREGULAR WEDGE CONFIGURATIONS, IEEE transactions on antennas and propagation, 45(3), 1997, pp. 563-564
A hybrid numerical technique based on the finite-element method (FEM)
is exploited to define a numerical diffraction coefficient for irregul
ar wedge configurations as, for instance, a perfectly conducting wedge
with an inhomogeneously filled cavity-backed aperture in one of its f
aces, or a wedge with a rounded edge.