Corrections to current distributions on curved reflectors

The specific problems of diffraction by a half plane, and by a circular strip with a line source at its center of curvature are considered. It is shown how the geometrical optics current can be corrected by the addition of an equivalent line current at each edge. In each case the "line current" is determined by the incident field at the edge. The field of the line current is non-isotropic, its directional gain is determined. The line currents do not greatly affect the total pattern indicating that the main character of the diffraction can be obtained from the geometrical optics currents. Experimental results for a circular reflector with a line source at its center are given.