Spherical wave diffraction by a slit in an impedance screen

An exact solution is developed for the problem of diffraction of an E-polar ized and an H-polarized spherical waves by a slit in an impedance screen. T his consideration is important in the sense that point sources are regarded as better substitutes for real sources than Line sources/plane waves. The two independent problems are solved using the Fourier transform, the Wiener -Hopf technique and asymptotic approximations.