Fully Coupled Hybrid FEM-UTD Method Using NURBS for the Analysis of Radiation Problems

A novel hybrid finite element method (FEM) -uniform theory of diffraction (UTD) method for the analysis of radiating structures in the presence of electrically large objects is presented. The hybridization is done in a fully coupled way taking into account mutual interactions between the FEM and UTD...

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Veröffentlicht in:	IEEE transactions on antennas and propagation 2008-03, Vol.56 (3), p.774-783
Hauptverfasser:	Fernandez-Recio, R., Garcia-Castillo, L.-E., Gomez-Revuelto, I., Salazar-Palma, M.
Format:	Artikel
Sprache:	eng
Schlagworte:	Antennas Applied classical electromagnetism Applied sciences Boundary conditions Clustering Computation Computational efficiency Diffraction Diffraction, scattering, reflection Electromagnetic coupling Electromagnetic scattering Electromagnetic wave propagation, radiowave propagation Electromagnetism electron and ion optics Exact sciences and technology Finite element method Finite element methods finite element methods (FEMs) Fundamental areas of phenomenology (including applications) hybrid solution methods Iterative methods Mathematical analysis Mathematical models Physical theory of diffraction Physics Radiocommunications Radiowave propagation ray tracing Reflector antennas Spline Strategy Surface reconstruction Surface topography Telecommunications Telecommunications and information theory uniform theory of diffraction (UTD)
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Beschreibung
Zusammenfassung:	A novel hybrid finite element method (FEM) -uniform theory of diffraction (UTD) method for the analysis of radiating structures in the presence of electrically large objects is presented. The hybridization is done in a fully coupled way taking into account mutual interactions between the FEM and UTD regions. The UTD objects are modeled using non-uniform rational B-spline (NURBS) surfaces. Ray acceleration techniques and simple clustering strategies are used to speed up the computation time. Numerical results are presented showing the validity of the method.
ISSN:	0018-926X 1558-2221
DOI:	10.1109/TAP.2008.916878