Results 221 to 230 of about 30,411 (268)

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

Comparison of FT-FDTD and Spectral Domain FDTD for Periodic Structures

2008 International Workshop on Antenna Technology: Small Antennas and Novel Metamaterials, 2008
In recent years, the metamaterials and its applications to antenna and other fields have been widely investigated theoretically and experimentally. The metamaterials are usually realized by some periodic structures composed of a conductor and/or dielectric/magnetic materials.
Kei Toyoda, Toru Uno, Takuji Arima
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

Implementation of ADI-FDTD subgrids in ground penetrating radar FDTD models

Journal of Applied Geophysics, 2009
Abstract 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.
Antonios Giannopoulos, Nectaria Diamanti
exaly   +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   +2 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

Stability analysis of the PML scheme for CN‐FDTD and ADI‐FDTD

Microwave and Optical Technology Letters, 2014
ABSTRACTThe alternating direction implicit‐finite‐difference time‐domain (ADI‐FDTD) method can be seen as a second‐order perturbation of the Crank–Nicolson FDTD (CN‐FDTD) scheme. When the PML is introduced for the ADI‐FDTD method, the perturbation term will affect the stability of the ADI‐FDTD method.
Jiunn‐Nan Hwang, Fu‐Chiarng Chen
openaire   +1 more source

A hybrid ADI-FDTD scheme and its comparisons with the FDTD method

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.
null Zhizhang Chen, I. Ahmed
openaire   +1 more source

Introduction to FDTD

2016
The FDTD method has gained tremendous popularity in the past decade as a tool for solving Maxwell's equations. It is based on simple formulations that do not require complex asymptotic or Green's functions. Although it solves the problem in time, it can provide frequency-domain responses over a wide band using the Fourier transform.
openaire   +1 more source

Numerical experiments on PEC boundary condition and late time growth involving the FDTD/FDTD and FDTD/FVTD hybrid

IEEE Antennas and Propagation Society International Symposium. 1995 Digest, 2002
Late time growth is a serious defect of the time domain electromagnetic numerical methods. It has been reported in some conformal FDTD numerical codes; and it is also observed in our FDTD/FVTD hybrid numerical code. The paper is devoted to investigations leading to a stabilizing technique to eliminate the late time growth in our FDTD/FDTD or FDTD/FVTD ...
K.S. Yee, J.S. Chen, A.H. Chang
openaire   +1 more source