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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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2008-03, Vol.56 (3), p.774-783
Main Authors: Fernandez-Recio, R., Garcia-Castillo, L.-E., Gomez-Revuelto, I., Salazar-Palma, M.
Format: Article
Language:English
Subjects:
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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Summary: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