title: The diffracted field and its gradient near the edge of a thin screen.
abstract: The secondary edge source line integral formulation for diffraction modeling uses edge sources with a 1/r dependency, in addition to a directivity function. At first sight, this might seem to contradict the expected 1/r behavior for the gradient near the edge of a thin screen. An analysis is presented for the special case of perpendicular plane wave incidence onto a thin screen, which shows that the secondary edge source formulation does indeed lead to the expected behavior close to the edge of an ideal wedge.
authors: Department of Mathematics and Statistics, University of Reading, Whiteknights, P.O. Box 220, Reading, RG6 6AX, United Kingdom.
authors: David P
authors: DP
authors: Hewett
authors: Acoustics Research Centre, Department of Electronics and Telecommunications, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway.
authors: U Peter
authors: UP
authors: Svensson