Accession Number : AD0606513

Title :   THE DIFFRACTION OF OBLIQUE SURFACE WAVES BY A RIGHT-ANGLE BEND,

Corporate Author : NEW YORK UNIV N Y COURANT INST OF MATHEMATICAL SCIENCES

Personal Author(s) : Karp,S. N. ; Chu,T. S.

Report Date : JUL 1964

Pagination or Media Count : 34

Abstract : The diffracted field that arises when an incident electromagnetic surface wave strikes the edge of a right-angle bend at an oblique angle is investigated. One face of the bend supports the surface wave and the other face is a perfect conductor. This diffraction problem is related to the scanning surface wave antennas. An analysis of oblique surface waves on an infinite impedance plane is first presented graphically. We treat two cases. In one case the edge of the bend is parallel, and, in the other case, perpendicular, to the perfectly conducting direction of the impedance plane. When the surface wave is incident normally, these special cases reduce to the normal TM and TE surface waves respectively. The mathematical formalism of the first case may bb y be reduced to that of a two dimensional TM problem which has been solved previously. The second case involves two coupled mixed boundary conditions and is exactly analyzed in detail. The effect of the obliquity on the reflection coefficient and the radiation pattern under various conditions is discussed. (Author)

Descriptors :   (*ELECTROMAGNETIC RADIATION, DIFFRACTION), (*ANTENNAS, ELECTROMAGNETIC RADIATION), WAVEGUIDE BENDS, ELECTRICAL IMPEDANCE, PROPAGATION, REFLECTION, VECTOR ANALYSIS, SCANNING

Distribution Statement : APPROVED FOR PUBLIC RELEASE