Radar cross sections of periodic deformed cylinder
Abstract
Scattering of plane waves by a perfectly conducting cylinder with arbitrary cross section is analyzed by the stationary phase method under the physical optics approximation. With the complex stationary points taken into account, the diffraction integral in the physical optics approximation can be approximated with good accuracy by the stationary phase method. The radar cross section obtained by the stationary phase method agrees well with the result obtained by numerical integration of the diffraction integral. With increasing frequency, the radar cross section obtained by the physical optics approximation approaches the result obtained by the modematching method. This indicates the effectiveness of the physical optics approximation for a scatter which is not convex. The scatterer which is not convex has several stationary points. Its radar cross section varies in a complicated manner but it is related to the scatterer's shape and the direction of the plane wave incidence. This is due to the interference of scattered waves from all stationary points.
 Publication:

Electronics Communications of Japan
 Pub Date:
 October 1978
 Bibcode:
 1978JElCo..61...70I
 Keywords:

 Cylindrical Bodies;
 Electric Conductors;
 Physical Optics;
 Plane Waves;
 Radar Cross Sections;
 Radar Scattering;
 Approximation;
 Asymptotic Methods;
 Frequency Response;
 Microwave Scattering;
 Wave Diffraction;
 Communications and Radar