Accession Number : AD0616655

Title :   THE FAR-FIELD BACK-SCATTERING FROM A CONCAVE CORNER OF A BODY OF REVOLUTION,

Corporate Author : RAND CORP SANTA MONICA CALIF

Personal Author(s) : Raymond,Joseph L.

Report Date : 21 APR 1960

Pagination or Media Count : 20

Abstract : The monostatic head-on radar cross section formed by a concave ring singularity has been calculated in the limit of small wave lengths. The solution is based upon Oberhettinger's treatment of the diffraction of plane waves by an infinite wedge. The techniques of solution are chiefly those developed by Siegel when he derived the cross section of a convex ring singularity. The geometry of a concave ring singularity occurs frequently with bodies of revolution when a cylinder is followed by a conical flare or with biconic configurations where a sharp cone is followed by a blunt cone. The theoretical small-wave length treatment is for wedges of all angles. With Siegel's solutions, the cross section of a ring singularity can be predicted for wedges having included angles of from zero to 360 degrees. For geometrically similar concave and convex wedges when the wedge angle is slightly different from a straight line (e.g., 180 degrees), the present concave solution gives a radar echo identical in the first derivative to the convex solution of Siegel, as would be expected from geometric considerations. (Author)

Descriptors :   (*RADAR SIGNALS, SCATTERING), (*BODIES OF REVOLUTION, RADAR CROSS SECTIONS), RINGS, WEDGES, CONICAL BODIES, CYLINDRICAL BODIES, GUIDED MISSILES, AIRCRAFT, DIFFRACTION

Distribution Statement : APPROVED FOR PUBLIC RELEASE