Accession Number : ADP006383

Title :   RCS Prediction Models Based on PO and PTD and State of Validation,

Corporate Author : DEUTSCHE FORSCHUNGS- UND VERSUCHSANSTALT FUER LUFT- UND RAUMFAHRT E V OBERPFAF FENHOFEN (GERMANY F R)

Personal Author(s) : Stein, V.

Report Date : SEP 1991

Pagination or Media Count : 15

Abstract : In the microwave case the scattering matrix of complicated targets is often evaluated on the basis of physical optics (PO). In cases where edge diffraction effects become relevant, the physical theory of diffraction (PTD) is used to correct the PO-field. Both methods are applied in the following paper to determine the radar cross-section (RCS) of a series of perfectly conducting structures: a thin flat plate, a thin cylinder, a cone-cylinder-half-sphere, a double dihedral and a periscope-like object. Since the geometric model of each object consists of panels, internal and external tests were made to estimate the deviations between the true surface and the model surface which can be tolerated to guarantee sufficient accuracy. All predicted RCS values are compared either with measurements or with independent theoretical results as references. Conclusions for the accuracy of PO and PTD are drawn and further work is discussed.

Descriptors :   *RADAR, *TARGET DETECTION, *RADAR CROSS SECTIONS, ACCURACY, DIFFRACTION, EDGES, ESTIMATES, EXTERNAL, INTERNAL, MICROWAVES, MODELS, PANELS, PERISCOPES, PLATES, SCATTERING, SPHERES, STRUCTURES, TARGETS, THEORY, GEOMETRY, SHAPE, MILITARY EQUIPMENT, CYLINDRICAL BODIES.

Subject Categories : Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE