UC Irvine

The need for a corner diffraction coefficient in a UTD scheme arises when the leading edge diffracted field experiences a discontinuity as it occurs when the diffraction point disappears from an edge or changes abruptly its location from one edge to the other. The solution proposed will be used to weigh the plane wave spectrum located at a finite distance from the vertex. Also obtained is the asymptotic evaluation of the spectral integrals and for simplicity, the scalar case is treated in this paper and the formulation for hard boundary conditions given explicitly.