Accession Number : AD0745114

Title :   High-Frequency Backscattering from an Elliptic Metal Plate,

Corporate Author : ILLINOIS UNIV URBANA ANTENNA LAB

Personal Author(s) : Lee,S. W. ; Uslenghi,P. L. E.

Report Date : JUL 1972

Pagination or Media Count : 50

Abstract : The high-frequency backscattered field produced by a plane, linearly polarized electromagnetic wave obliquely incident on a perfectly conducting disk of elliptical shape is considered. The leading term of the asymptotic expansion is obtained by means of the geometrical theory of diffraction, and it is matched to the physical optics result for normal incidence via Bessel functions. The formula thus obtained is uniformly valid for all directions of incidence and polarization; it reduces to the known result for a circular disk in the case of zero eccentricity. Numerical results are presented for direct- and cross-polarized monostatic cross sections. The difficulties encountered in obtaining higher-order terms of the asymptotic expansion are discussed in detail. (Author)

Descriptors :   (*ELECTROMAGNETIC WAVE REFLECTIONS, METAL PLATES), DISKS, BACKSCATTERING, HIGH FREQUENCY, DIFFRACTION, POLARIZATION, RADAR REFLECTIONS, ASYMPTOTIC SERIES, BESSEL FUNCTIONS, NUMERICAL ANALYSIS

Subject Categories : Active & Passive Radar Detection & Equipment
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE