On the Application of the GTD-MM Technique and its Limitations

John N. Sahalos, Gary A. Thiele

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

In 1975 two techniques were published that combined the method of moments (MM) and the geometrical theory of diffraction (GTD). One technique extended the moment method through the use of the GTD while the second used the moment method to solve for unknown diffraction coefficients, thereby extending the use of the GTD. It is the latter method that is considered in this paper and is referred to as the GTD-MM technique. One problem area that existed with the original GTD-MM work was associated with a field incident along or nearly along one wall of a wedge structure. An improved series representation for the diffracted current that is sufficient at all incidence angles is shown. The improved formulation is then applied to the problem of bistatic scattering by a three-sided pyramid. Radar cross section (RCS) results that compare very well with experimental measurements are obtained. This is believed to be the first use of the GTD-MM technique in treating a three-dimensional geometry.

Original languageEnglish
Pages (from-to)780-786
Number of pages7
JournalIEEE Transactions on Antennas and Propagation
Volume29
Issue number5
DOIs
Publication statusPublished - 1981

Fingerprint

geometrical theory of diffraction
Diffraction
moments
Method of moments
radar cross sections
method of moments
Radar cross section
pyramids
wedges
incidence
formulations
Scattering
coefficients
geometry
Geometry
scattering
diffraction

Cite this

Sahalos, John N. ; Thiele, Gary A. / On the Application of the GTD-MM Technique and its Limitations. In: IEEE Transactions on Antennas and Propagation. 1981 ; Vol. 29, No. 5. pp. 780-786.
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On the Application of the GTD-MM Technique and its Limitations. / Sahalos, John N.; Thiele, Gary A.

In: IEEE Transactions on Antennas and Propagation, Vol. 29, No. 5, 1981, p. 780-786.

Research output: Contribution to journalArticle

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