Results 161 to 170 of about 2,196 (202)
Some of the next articles are maybe not open access.
A New Multiresolution FDTD Approach Based on the Hybridization of MR-FDTD and DG-FDTD Methods
2007 IEEE/MTT-S International Microwave Symposium, 2007In this paper, a new multiresolution approach based on the hybridization of the well-known multiple-region FDTD (MR-FDTD) and the new dual-grid FDTD (DG-FDTD) is applied to simulate the transmission between two ultra wide-band (UWB) antennas. The good results for the S parameters as well as the large gain on computational time makes the hybrid MR-FDTD /
Pascaud, Romain +4 more
openaire +5 more sources
A new FDTD algorithm - ADI/R-FDTD
2002 3rd International Symposium on Electromagnetic Compatibility, 2003Making use of the two modified finite-difference time-domain (FDTD) methods, that is, ADI-FDTD and R-FDTD, we propose a new time domain method in this paper. The method is established from Maxwell curl and divergence equations. It inherits the advantages of both former methods, i.e., not only eliminating the restraint of the Courant-Friedrich-Levy (C-F-
Ren Wu, Liu Bo, Tan Wei, Gao Benqing
openaire +2 more sources
International Journal of Numerical Modelling: Electronic Networks, Devices and Fields, 2002
AbstractIn this paper, the finite‐difference time‐domain (FDTD), multiple‐region/FDTD (MR/FDTD) and ray‐tracing/FDTD (RT/FDTD) techniques have been compared with reference to the study of the field scattered by and induced inside an exposed target. The three techniques have been validated on a free‐space radiation problem through a comparison with the ...
BERNARDI, Paolo Italo +5 more
openaire +3 more sources
AbstractIn this paper, the finite‐difference time‐domain (FDTD), multiple‐region/FDTD (MR/FDTD) and ray‐tracing/FDTD (RT/FDTD) techniques have been compared with reference to the study of the field scattered by and induced inside an exposed target. The three techniques have been validated on a free‐space radiation problem through a comparison with the ...
BERNARDI, Paolo Italo +5 more
openaire +3 more sources
FDTD in curvilinear coordinates using a rectangular FDTD formulation
2011 IEEE International Symposium on Antennas and Propagation (APSURSI), 2011In the simplest formulation, the FDTD algorithm requires that objects follow the rectangular grid. For curved surfaces, this is a severe limitation. In this paper, an approach to modify an existing rectangular FDTD code to model structures more naturally described in another coordinate system is demonstrated.
R. Todd Lee +3 more
openaire +2 more sources
FDTD Analysis of EBG Superstrates
2007 Workshop on Computational Electromagnetics in Time-Domain, 2007AbstractRadiating devices, made up by woodpile electromagnetic bandgap (EBG) material superstrates placed over microstrip patches, are taken in consideration. Much interest is devoted to such antennas because of their enhanced directivity. The radiated far‐field has been calculated using an in‐house finite‐difference time‐domain (FDTD) code.
FREZZA, Fabrizio +3 more
openaire +7 more sources
A hybrid ADI-FDTD scheme and its comparisons with the FDTD method [PDF]
IEEE Antennas and Propagation Society International Symposium. Digest. Held in conjunction with: USNC/CNC/URSI North American Radio Sci. Meeting (Cat. No.03CH37450), 2004 In this paper a technique that hybrid FDTD and ADI-FDTD methods for a locally graded mesh is proposed for efficient numerical modeling of RF/microwave structures. In it, the conventional FDTD grid is applied in the coarse mesh region, while the ADI-FDTD is used in the locally dense region.
I. Ahmed, Zhizhang Chen
openaire +1 more source
A hybrid FDTD and leapfrog ADI-FDTD method with PML implementation
2011 IEEE MTT-S International Microwave Symposium, 2011In this paper, a hybrid FDTD and leapfrog alternating-direction-implicit finite-difference time-domain (ADI-FDTD) method is presented. The perfectly matched layer (PML) absorbing boundary conditions are also incorporated in the method and non-uniform grids are deployed to efficiently model electromagnetic radiation and scattering in open domains.
Farid Jolani, Yiqiang Yu, Zhizhang Chen
openaire +2 more sources
Application of system identification technique to FDTD and FDTD Diakoptics method
23rd European Microwave Conference, 1993, 1993The system identification technique is applied to the FDTD Diakopties method. The computational time and computer storage are significantly reduced. This technique is successfully used in the FDTD Diakoptics simulation of active microwave circuits.
Bijgan Houshmand +2 more
openaire +2 more sources
Multiresolution fdtd with switchable grid
2006 First European Conference on Antennas and Propagation, 2006A new multiresolution approach for the FDTD is proposed and applied to an ultra wide-band (UWB) problem. The multiresolution FDTD with switchable grid (SWG-FDTD) splits the simulation along the time into two FDTD schemes with different mesh densities.
Pascaud, Romain +4 more
openaire +4 more sources