Accession Number : AD0609724

Title :   THE BORN APPROXIMATION APPLIED TO ELECTROMAGNETIC SCATTERING FROM A FINITE CONE.

Descriptive Note : Scientific rept. no. 2,

Corporate Author : PURDUE UNIV LAFAYETTE IND SCHOOL OF ELECTRICAL ENGINEERING

Personal Author(s) : Hodge,D. B. ; Schultz,F. V.

Report Date : SEP 1964

Pagination or Media Count : 70

Abstract : This report contains a discussion of the Kirchhoff, or physical optics, approximation used in determining the fields scattered from perfectly conducting obstacles. The basic assumptions implicit in this method are investigated and it is shown that this method fails to predict the depolarization phenomenon expected when obstacles lacking symmetry are considered. Finally, the Born approximation is applied to the determination of the fields scattered from a perfectly conducting finite cone immersed in a plane electromagnetic wave. The second Born approximation is calculated using spherical eigenfunction expansions. The numerical investigation indicates, however, that this solution converges slowly. (Author)

Descriptors :   (*ELECTROMAGNETIC RADIATION, SCATTERING), (*RADAR CROSS SECTIONS, CONICAL BODIES), (*FIELD THEORY, NUMERICAL ANALYSIS), POTENTIAL THEORY, ELECTROMAGNETIC FIELDS, BOUNDARY VALUE PROBLEMS, OPTICS, HARMONIC ANALYSIS, SERIES(MATHEMATICS), INTEGRALS, DIFFRACTION

Distribution Statement : APPROVED FOR PUBLIC RELEASE