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

Author

Fernández-Recio, Raúl ; García-Castillo, Luis-Emilio ; Gómez-Revuelto, Ignacio ; Salazar-Palma, Magdalena

Author_Institution

Airbus Espafia SL, Getafe

Volume

56

Issue

3

fYear

2008

fDate

3/1/2008 12:00:00 AM

Firstpage

774

Lastpage

783

Abstract

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.

Keywords

computational electromagnetics; finite element analysis; geometrical theory of diffraction; splines (mathematics); NURBS; electrically large objects; finite element method; fully coupled hybrid FEM-UTD method; non-uniform rational B-spline surfaces; radiating structures; radiation problems; ray acceleration techniques; simple clustering; uniform theory of diffraction; Boundary conditions; Computational efficiency; Electromagnetic scattering; Finite element methods; Iterative methods; Physical theory of diffraction; Reflector antennas; Spline; Surface reconstruction; Surface topography; Electromagnetic coupling; finite element methods (FEMs); hybrid solution methods; ray tracing; uniform theory of diffraction (UTD);

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2008.916878

Filename

4463894