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This paper is concerned with the diffraction of an electromagnetic wave by aperfectly conducting half-plane in a homogeneous bi-isotropic medium(asymptotically). Similar analysis in a source-free field is done in Asghar,S.and Lakhtakia, A., (1994), Plane-wave diffraction by a perfectly conductinghalf-plane in a homogeneous bi-isotropic medium. Int. J Appl. Electromagneticsin materials,5,(1994), 181-188. In this paper attention is focused on the wavecoming from a line source.  The objective is to study the scattering of an electromagnetic wave from theboundary of a half-plane and thereby to provide a theoretical framework for theline source diffraction asymptotically. In far field approximation it is shownthat an incident wave coming from a line source behaves like a plane wave. Thescattered field is calculated by using the Fourier transform and theWiener-Hopf techniques. The scattered field in the far zone is determined byusing contour integration.

ASYMPTOTIC ANALYSIS OF A LINE SOURCE DIFFRACTION BY A PERFECTLY CONDUCTING HALF-PLANE IN A BI-ISOTROPIC MEDIUM