PLANE-WAVE DIFFRACTION BY AN IMPEDANCE STEP

Plane wave diffraction by two half-planes joined by a step is studied in the case where the half-planes and the step are characterized by di fferent surface impedances. The diffraction problem is first reduced t o a modified Wiener-Hopf equation of the second kind whose solution co ntains an infinite set of constants satisfying an infinite system of l inear algebraic equations. A numerical solution of this system is obta ined for various values of the surface impedances and the height of th e step, through which the effect of these parameters on the diffractio n phenomenon is studied.