ELECTROMAGETIC PULSE DIFFRACTION BY A MOVING HALF-PLANE

This paper is concerned with the scattering of an electromagnetic (EM) pulse by a perfectly conducting half-plane, moving in a free space. It is assumed that the source signal is a plane wave pulse with its envelope described by a Dirac delta function. The representation for the total field is found, and physical interpretation of the solution is given. This representation, valid for all screen velocities, is then reduced to the case of moderate and low velocities, important for practical applications. Electromagnetic wave scattering by moving objects has a long history and is interesting from both practical and theoretical point of view. Its applications can be found in telecommunication, object recognition, space science and astronomy. Of special interest are scattering objects with edges. In (1) plane wave diffraction by a moving cylinder was analyzed and such phenomena as Doppler shift of equiphase surfaces in the diffracted wave and angular shift of the location of its amplitude singularities were reported. Those phenomena were also confirmed in (2), where diffraction by a wedge in motion was considered. In more recent work (3), concerned with plane wave diffraction by a moving half-plane, similar phenomena were noticed, and also a rotation of the incident and reflected wave shadow boundaries were observed. In (4- 6) different solving approaches were analyzed and effectively applied to problems with Gaussian beam excitations and moving cylinder and wedge shaped obstacles. Most of works on wave scattering by objects with edges, including all those aforementioned, deal with time harmonic fields. In this paper we extend the results obtained in (3) to the case where the exciting field