Accession Number : ADA302034

Title :   Physical Theory of Diffraction Equivalent Edge Currents for Truncated Wedge Strips.

Descriptive Note : Rept. for Mar-Jun 95,

Corporate Author : ROME LAB HANSCOM AFB MA

Personal Author(s) : Johansen, Peter M.

PDF Url : ADA302034

Report Date : SEP 1995

Pagination or Media Count : 44

Abstract : New uniform closed form expressions for physical theory of diffraction equivalent edge currents are derived for truncated incremental wedge strips. expressions, the new expressions are well behaved for all directions of incidence and observation and take a finite value for zero strip length. The new expressions are derived by calculating the difference between two terms. The first term is obtained by integrating the exact fringe wave current on a wedge along an untruncated incremental strip extending from the leading edge of the structure under consideration. The second term is calculated from an integration of the asymptotic fringe wave current along another untruncated incremental strip extending from the trailing edge of the structure. The new expressions are tested numerically on a triangular cylinder and the results are compared with those obtained using the method of moments and the previously reported expressions.

Descriptors :   *ELECTROMAGNETIC WAVE PROPAGATION, *DIFFRACTION, *WEDGES, COMPUTATIONS, PHYSICAL PROPERTIES, LEADING EDGES, METHOD OF MOMENTS, CURRENTS, TRUNCATION, TRAILING EDGES.

Subject Categories : Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE