Results 181 to 190 of about 9,188 (232)

FDTD in curvilinear coordinates using a rectangular FDTD formulation

2011 IEEE International Symposium on Antennas and Propagation (APSURSI), 2011
In 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. T. Lee, J. G. Maloney, B. N. Baker, D. W. Landgren   +3 more
openaire   +1 more source

A hybrid FDTD and leapfrog ADI-FDTD method with PML implementation

2011 IEEE MTT-S International Microwave Symposium, 2011
In 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.
F. Jolani, Y. Yu, Z. D. Chen
openaire   +1 more source

Research on Hybrid Algorithm of Explicit Newmark-FDTD and Traditional FDTD Methods

2021 International Applied Computational Electromagnetics Society (ACES-China) Symposium, 2021
The Newmark method is used to discretize the subgridding numerical system, and explicit Newmark-FDTD method is obtained by employing the Neumann series to expand the inverse of the coefficient matrix. Furthermore, the hybrid algorithm of explicit Newmark-FDTD and traditional FDTD methods is employed to further improve the computational efficiency.
Xinbo He, Bing Wei, Kaihang Fan
openaire   +1 more source

Application of system identification technique to FDTD and FDTD Diakoptics method

23rd European Microwave Conference, 1993, 1993
The 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.
Tian-Wei Huang, Bijgan Houshmand, Tatsuo Itoh   +2 more
openaire   +1 more source

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2010
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openaire   +2 more sources

FDTD Analysis of EBG Superstrates

2007 Workshop on Computational Electromagnetics in Time-Domain, 2007
AbstractRadiating 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, NOCITO, PAOLO, PAJEWSKI, Lara, G. Schettini   +3 more
openaire   +6 more sources

On the numerical properties of the ADI-FDTD and CNSS-FDTD method

Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521), 2004
The formula for the stability and numerical dispersion of the "alternating directions implicit" (ADI), finite-difference time domain (FDTD) and for the "Crank-Nicolson slit step" (CNSS) FDTD method are obtained and their properties are discussed.
openaire   +1 more source

An Investigation into the Implementation of ADI-FDTD Subgrids in FDTD GPR Modeling

2007 4th International Workshop on, Advanced Ground Penetrating Radar, 2007
The 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
N. Diamanti, A. Giannopoulos
openaire   +1 more source

Multiresolution fdtd with switchable grid

2006 First European Conference on Antennas and Propagation, 2006
A 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, Gillard, Raphaël, Loison, Renaud, Wiart, Joe, Wong, Man-Faï   +4 more
openaire   +2 more sources

FDTD simulations of indoor propagation

Proceedings of IEEE Vehicular Technology Conference (VTC), 2002
This paper presents a 2D finite difference time domain method used for indoor propagation calculations. The relationship between the 2D and the 3D problem is discussed. An interpretation of the 2D results is done. The results of a sample calculation are presented and compared to those of other papers.
A. Laner, Achim Bahr, Ingo Wolff
openaire   +1 more source