Results 231 to 240 of about 24,972 (270)

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
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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

Analysis of surrounded antennas: from DG-FDTD to DG-FDTD/IPO

2014 IEEE Conference on Antenna Measurements & Applications (CAMA), 2014
The paper first discusses the numerical capabilities of the DG-FDTD method. An analytical formulation is proposed to assess the size of the largest possible computational volume. Then, a recently proposed hybrid method, called DG-FDTD/IPO, which extends the DG-FDTD application is presented.
Le Lepvrier, Benoît, Loison, Renaud, Gillard, Raphaël, Potier, Patrick, Pouliguen, Philippe   +4 more
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An hybrid FDTD and ADI-FDTD technique for coupled Maxwell's and Schrodinger's equations

2010 IEEE Antennas and Propagation Society International Symposium, 2010
We are entering into the era of nanotechnology and the size of devices is reaching the scale of few nano-meters. A number of new research areas such as nano-photonics, plasmonics and nano-electronics have attracted special attention. It is being projected that these areas will facilitate to tackle the challenges of device miniaturization and high speed
I Ahmed, null Erping Li
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Dispersion Analysis of the ADI-FDTD and S-FDTD Methods

2008
Numerical dispersion performances of ADI-FDTD and S-FDTD methods have been compared. It has been shown that for time steps below the stability limits of the S-FDTD method it has Much better dispersion performance compared with the ADI-FDTD method and that the S-FDTD method can be usefully employed for space increments in the order of lambda/25 to ...
Kusaf, Mehmet, Oztoprak, Abdullah Y.
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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.
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The FDTD diakoptics method

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.
T.-W. Huang, B. Houshmand, T. Itoh
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Hybridizing DGTD and FDTD

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.
Salvador G. Garcia, M. Fernandez Pantoja, A. Rubio Bretones, R. Gomez Martin   +3 more
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A hybrid R-FDTD/FDTD algorithm using a method of subregion connection

2002 3rd International Conference on Microwave and Millimeter Wave Technology, 2002. Proceedings. ICMMT 2002., 2003
As a recently developed technique for FDTD algorithm, R-FDTD leads to a memory-efficient formulation, with a direct memory reduction of 33% in the storage of the fields compared to traditional FDTD algorithm. However, R-FDTD is complicated to deal with the regions including conductors and source.
null Liu Bo, null Gao Ben-Qing, null Ren Wu, null Yang Shi-Ming   +3 more
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Lossy dielectrics in FDTD

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   +1 more source