Title :
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
fDate :
3/1/2008 12:00:00 AM
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);
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2008.916878
