RCS prediction models based on PO and PTD and state of validation
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 another 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 periscopelike 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.
 Publication:

In AGARD
 Pub Date:
 September 1991
 Bibcode:
 1991tcse.agarR....S
 Keywords:

 Geometrical Theory Of Diffraction;
 Mathematical Models;
 Microwave Scattering;
 Physical Optics;
 Radar Cross Sections;
 Cones;
 Dihedral Angle;
 Flat Plates;
 Impedance;
 Panels;
 S Matrix Theory;
 Spheres;
 Statistical Analysis;
 Thin Plates;
 Communications and Radar