Current-based hybrid analysis for surface-wave effects on large scatterers

Current-based hybrid analyses combine the method of moments (MM) with Ansatz currents derived from high-frequency methods such as physical optics, physical theory of diffraction (PTD), geometric theory of diffraction (GTD), and the Fock theory. The author introduces an analysis that incorporates a surface-wave basis set into the hybrid formulation. This approach substantially improves the modeling of nonspecular effects caused by surface waves. The discussion emphasizes the accurate representation of surface wave currents and the reduction of computational efforts in comparison with the conventional MM techniques. Scattering calculations for bodies of revolution (BORs) and two dimensional surfaces demonstrate the effectiveness of the analysis presented for large scatterers. >

[1]  A method toward improved convergence of moment-method solutions , 1972 .

[2]  W. Burnside,et al.  A technique to combine the geometrical theory of diffraction and the moment method , 1973 .

[3]  G. Thiele,et al.  A hybrid technique for combining moment methods with the geometrical theory of diffraction , 1975 .

[4]  G. Thiele,et al.  A hybrid technique for combining the moment method treatment of wire antennas with the GTD for curved surfaces , 1978 .

[5]  John N. Sahalos,et al.  On the application of the GTD-MM technique and its limitations , 1981 .

[6]  L. Medgyesi-Mitschang,et al.  Hybrid solutions for scattering from perfectly conducting bodies of revolution , 1983 .

[7]  C. Fletcher.  Computational Galerkin Methods , 1983 .

[8]  L. Medgyesi-Mitschang,et al.  Hybrid solutions for scattering from large bodies of revolution with material discontinuities and coatings , 1984 .

[9]  L. Medgyesi-Mitschang,et al.  Electromagnetic scattering from extended wires and two- and three-dimensional surfaces , 1985 .

[10]  L. Medgyesi-Mitschang,et al.  Hybrid solutions for large-impedance coated bodies of revolution , 1986 .

[11]  L. Medgyesi-Mitschang,et al.  Electromagnetic scattering from electrically large coated flat and curved strips: Entire domain Galerkin formulation , 1987 .

[12]  L. Medgyesi-Mitschang,et al.  Mixed-domain Galerkin expansions in scattering problems , 1988 .

[13]  Prabhakar H. Pathak,et al.  Modal, ray, and beam techniques for analyzing the EM scattering by open-ended waveguide cavities , 1989 .

[14]  Prabhakar H. Pathak,et al.  Ray analysis of modal reflection for three-dimensional open-ended waveguides , 1989 .