Wedge Diffraction: Radiation by Fringe Components of Surface Sources

The integral and asymptotic expressions can be constructed for a field radiated by the nonuniform/fringe component of the surface sources which are induced at the wedge by the incident wave. The contribution to the diffracted field by the nonuniform/fringe component is the difference between the exact total field and its physical optics (PO) part; this contribution is investigated in the chapter. The integrals derived for the fringe field are taken along the steepest descent path and are very convenient for numerical and analytical analysis. The chapter demonstrates the reduction of the three-dimensional diffraction problem for the oblique incidence to a two-dimensional problem for the normal incidence. The solution for the oblique incidence can be found automatically using simple replacements in the solution for the normal incidence.