Hybrid method computation of diffraction by trailing edges using reciprocity

Author

Ingham, D.R.

Author_Institution

Lockheed Missiles & Space Co., Sunnyvale, CA, USA

fYear

1990

fDate

7-11 May 1990

Firstpage

1574

Abstract

A perturbation procedure for combining analytic and numerical methods for the computation of scattering by large bodies and of diffraction coefficients for trailing edges is presented. This procedure has been tested for trailing edge scattering by a conducting half plane. It is seen to eliminate the difficulty encountered by other numerical methods near grazing angle. The approach consists of substituting distorted wave fields for the incident and scattered plane wave fields of a purely numerical calculation. As a demonstration of this method, back-scattering by a conducting half plane was calculated by a combination of physical optics and the method of moments.<>

Keywords

electromagnetic wave diffraction; perturbation techniques; physical optics; analytic methods; backscattering; conducting half plane; diffraction; distorted wave fields; hybrid computation method; incident plane wave fields; large bodies; method of moments; numerical methods; perturbation procedure; physical optics; reciprocity; scattered plane wave fields; scattering; trailing edges; Application software; Diffraction; Frequency; H infinity control; Missiles; Polarization; Scattering; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1990. AP-S. Merging Technologies for the 90's. Digest.

Conference_Location

Dallas, TX, USA

Type

conf

DOI

10.1109/APS.1990.115418

Filename

115418