Results 181 to 190 of about 2,196 (202)
Some of the next articles are maybe not open access.
An Investigation into the Implementation of ADI-FDTD Subgrids in FDTD GPR Modeling
2007 4th International Workshop on, Advanced Ground Penetrating Radar, 2007The implementation of subgrids in the traditional finite-difference time-domain (FDTD) method is often required, especially when structures of fine geometry need to be modeled. Since the FDTD method is conditionally stable, different time-steps should be employed in the main grid and in the subgrid. To overcome the requirement for time interpolation at
Antonios Giannopoulos, Nectaria Diamanti
openaire +2 more sources
2007 International Conference on Electromagnetics in Advanced Applications, 2007
This paper describes a hybrid combination of FDTD and DGTD employing DGTD only to accurately model the geometric details of curved objects, while maintaining the simplicity of FDTD for the surrounding space.
Mario F. Pantoja +3 more
openaire +2 more sources
This paper describes a hybrid combination of FDTD and DGTD employing DGTD only to accurately model the geometric details of curved objects, while maintaining the simplicity of FDTD for the surrounding space.
Mario F. Pantoja +3 more
openaire +2 more sources
1993 IEEE MTT-S International Microwave Symposium Digest, 2002
A finite-difference-time-domain (FDTD) diakoptics method is developed. Sequential and parallel algorithms are provided to connect cascaded segments and to realize the modular computation of large circuits. When the large circuit is modified, only a few segments need to be recalculated, while the mutual interaction is preserved.
Tatsuo Itoh +2 more
openaire +2 more sources
A finite-difference-time-domain (FDTD) diakoptics method is developed. Sequential and parallel algorithms are provided to connect cascaded segments and to realize the modular computation of large circuits. When the large circuit is modified, only a few segments need to be recalculated, while the mutual interaction is preserved.
Tatsuo Itoh +2 more
openaire +2 more sources
2014 IEEE Antennas and Propagation Society International Symposium (APSURSI), 2014
The Stochastic FDTD (S-FDTD) method provides a way to determine the mean and variance of the electric and magnetic fields in a model where the electrical properties (conductivity and permittivity) vary stochastically, from a single S-FDTD simulation.
Furse, Cynthia M., Smith, Steve
openaire +2 more sources
The Stochastic FDTD (S-FDTD) method provides a way to determine the mean and variance of the electric and magnetic fields in a model where the electrical properties (conductivity and permittivity) vary stochastically, from a single S-FDTD simulation.
Furse, Cynthia M., Smith, Steve
openaire +2 more sources
IEEE Transactions on Antennas and Propagation, 1993
The finite-difference time-domain (FDTD) method easily includes materials with constant values of permittivity and conductivity. However, most lossy dielectrics are described over a band of frequencies by a constant complex permittivity. For a transient FDTD calculation, constant real permittivity and conductivity values provide a poor approximation ...
openaire +2 more sources
The finite-difference time-domain (FDTD) method easily includes materials with constant values of permittivity and conductivity. However, most lossy dielectrics are described over a band of frequencies by a constant complex permittivity. For a transient FDTD calculation, constant real permittivity and conductivity values provide a poor approximation ...
openaire +2 more sources
Computer Physics Communications, 2007
We describe a parallel, multiscale, multigrid, finite-difference time-domain (FDTD) code for simulating electromagnetic wave propagation in two-dimensional systems involving Lorentz and Drude media. We compare multigrid leapfrog time-stepping procedures and analyze the efficacy and scalability of multigrid use in FDTD.
Zdzisław Meglicki +2 more
openaire +2 more sources
We describe a parallel, multiscale, multigrid, finite-difference time-domain (FDTD) code for simulating electromagnetic wave propagation in two-dimensional systems involving Lorentz and Drude media. We compare multigrid leapfrog time-stepping procedures and analyze the efficacy and scalability of multigrid use in FDTD.
Zdzisław Meglicki +2 more
openaire +2 more sources
On the dispersion in TLM and FDTD
IEEE Transactions on Microwave Theory and Techniques, 1994The dispersion relations of a two-dimensional TLM mesh and a three-dimensional TLM mesh with condensed symmetric nodes are calculated. For the calculation of the TLM dispersion relations, we use a generalized method which can be applied to any TLM node described by square scattering and propagation matrices of equal dimension.
Peter Russer, M. Krumpholz
openaire +2 more sources
Electromagnetic "zoom" in FDTD
26th European Microwave Conference, 1996, 1996A method associating different schemes of Finite Difference Time Domain (F.D.T.D.) numerical models has been developed. The problems involving complex, electrically large, three-dimensional structures, combined with complex, but electrically small, three-dimensional elements, cannot be resolved accurately with a traditional F.D.T.D. approach.
Joël Andrieu +3 more
openaire +2 more sources
An interface for the FDTD diakoptics
1998 IEEE MTT-S International Microwave Symposium Digest (Cat. No.98CH36192), 2002A new formulation of the TLM type (or the directional wave type) interface for the FDTD diakoptics is proposed. The interface is implemented in the FDTD algorithm using the concept of the impedance boundary condition incorporated with a signal source model without adopting the absorbing boundary condition.
M. Tomizawa, T. Shibata
openaire +2 more sources
Implementation of ADI-FDTD subgrids in ground penetrating radar FDTD models
Journal of Applied Geophysics, 2009Abstract Realistic numerical modeling of ground penetrating radar (GPR) using the finite-difference time-domain (FDTD) method could greatly benefit from the implementation of subgrids – supporting finer spatial resolution – into the conventional FDTD mesh.
Nectaria Diamanti, Antonios Giannopoulos
openaire +2 more sources