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Unconditionally stable FDTD method based on Chebyshev polynomials—Chebyshev(CS)FDTD
2021 International Applied Computational Electromagnetics Society (ACES-China) Symposium, 2021An unconditionally stable solution using Chebyshev polynomials is proposed for the finite-difference time-domain (FDTD) method. The orthogonality and recurrence of Chebyshev polynomials are used to reconstruct the signal, and Chebyshev polynomials differential matrix is established to realize the transformation of time-domain Maxwell's equations to the
Chao Li +5 more
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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
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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. T. Lee +3 more
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Comparison between HIE‐FDTD method and ADI‐FDTD method
Microwave and Optical Technology Letters, 2007AbstractThis letter gives the comparison of the 3D hybrid implicit–explicit finite‐difference time‐domain (HIE‐FDTD) method with the ADI‐FDTD method through numerical examples. It shows that the HIE‐FDTD method has higher accuracy than the ADI‐FDTD method, especially for larger rate of field variation; the time step size, which has a detrimental effect
Juan Chen, Jianguo Wang
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Accuracy improved ADI‐FDTD methods
International Journal of Numerical Modelling: Electronic Networks, Devices and Fields, 2006AbstractFDTD method plays an important role for simulation of different structures in various fields of engineering, such as RF/microwaves, photonics and VLSI. However, due to the CFL stability constraint, the FDTD time step is still small and the related CPU time is still large for modelling fine geometry where small cell sizes are required to resolve
Ahmed, Iftikhar, Chen, Zhizhang (David)
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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
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Analysis of surrounded antennas: from DG-FDTD to DG-FDTD/IPO
2014 IEEE Conference on Antenna Measurements & Applications (CAMA), 2014The 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 +4 more
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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
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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
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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
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