Abstract-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.
In this paper we investigate the canonical problem of plane wave diffraction by a wedge in the context of the spectral domain approach which exploits the re lationship between the induced current on a scatterer and its far field. We show how the Sommerfeld solution to the wedge diffraction problem can be manipulated in a form which enables one to interpret the far scattered field as the Fourier transform of the physical optics current on the two faces of the wedge, augmented by the fringe current near the tip of the wedge. We also show that the (continued) D D , jan 73 1473
uniform asymptotic expansion derived by Lee and Deschamps on the basis of theLewis, Ahluwalia and Boersma ansatz can be rigorously obtained using the approach presented in this paper.
S E C U R IT Y CLASSIFICATION O F THIS P AGEfH7i*n D e te E ntered)
PLANE-WAVE DIFFRACTION BY A WEDGE-A SPECTRAL DOMAIN APPROACHA. Ciarkowski and R. Mittra
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