Diffraction of Electromagnetic Waves by a Moving Impedance Wedge

摘要

A formal solution to the problem of the diffraction of electromagnetic waves by a wedge with given surface impedances, moving parallel or perpendicular to its bisection plane with constant velocity, has been obtained. Characteristics of the diffracted field are studied, and approximate expressions for the Doppler shifts of the excited surface-wave fields and the scattered field in the shadow region are evaluated for both relativistic and non-relativistic considereations. Plots of these results for a 60 degrees wedge and a half plane are shown to illustrate their dependence on the surface impedance, the wedge angle, and the angle of incidence. Also, the variation of the amplitude of surface waves with respect to the velocity of the moving wedge is iscussed. (Author)