CALCULATION OF THE DIFFRACTED WAVES FROM THE EDGE OF AN OPAQUE CUT CYLINDER BY THE BOUNDARY DIFFRACTION WAVE THEORY


Altingoz C., YALÇIN U.

JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY, vol.28, no.1, pp.85-90, 2013 (SCI-Expanded) identifier identifier

Abstract

In this paper the uniform diffracted fields from an opaque cylinder cut surface are studied with the theory of the boundary diffraction wave(BDW). For an incoming cylindrical wave, first the vector potential is refound. The new generated vector potential is used in the calculation of the scalar electric/magnetic field, for the observation point. The field expression is taken in Helmholtz-Kirchoff integral form. By applying the Stokes theorem, the field expression can be written as the sum of the diffracted wave field and the geometrical optic field. The obtained diffracted wave field expression results in a non-uniform structure. The non-uniform field expression is converted to uniform structure by using the fresnel function. In this work the diffracted wave field from the edge of an opaque cut cylinder is calculated with the boundary diffraction wave theory for the first time. Total scattered field is calculated as the sum of the diffracted and the geometrical optic wave fields in this work. Finally the uniform and non-uniform diffracted wave fields and the total scattered field are examined numerically.