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Tutorial on finite-difference time-domain (FDTD) methods for room acoustics simulation
The Journal of the Acoustical Society of America, 2021Wave-based simulation models for acoustics have remained an active area of research and development for the past three decades. Wave-based methods aim to solve the 3D wave equation directly and therefore have large computational costs relative to conventional ray-based methods, which tend to simplify wave-diffraction effects.
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The Finite Difference Time Domain (FDTD) Method
2002This chapter is an overview of the numerical method used to model the devices presented in this work.
Christina Manolatou, Hermann A. Haus
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1998 IEEE EMC Symposium. International Symposium on Electromagnetic Compatibility. Symposium Record (Cat. No.98CH36253), 2002
A hybrid method that efficiently combines two powerful numerical techniques, i.e. the finite difference time domain (FDTD) and the method of moments in the time domain (MoMTD) is presented. The method is applicable to complex geometrics comprising thin wires which are studied using the MoMTD, and arbitrary inhomogeneous dielectric structures analyzed ...
A.R. Bretones, R.G. Martin, R. Mittra
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A hybrid method that efficiently combines two powerful numerical techniques, i.e. the finite difference time domain (FDTD) and the method of moments in the time domain (MoMTD) is presented. The method is applicable to complex geometrics comprising thin wires which are studied using the MoMTD, and arbitrary inhomogeneous dielectric structures analyzed ...
A.R. Bretones, R.G. Martin, R. Mittra
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MR/FDTD: A multiple-region finite-difference--time-domain method
Microwave and Optical Technology Letters, 1997Multiple-region FDTD (MR/FDTD), an extension of classical FDTD to multiple subregions within a problem domain, is introduced. In MR/FDTD the problem domain is broken into several independent FDTD subregion lattices. The subregions lattices are terminated with the use of a surface integrated radiation boundary condition applied simultaneously to all ...
J. Michael Johnson, Yahya Rahmat-Samil
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A novel separable backward-central finite difference time domain (FDTD) method
2005 IEEE Antennas and Propagation Society International Symposium, 2005In this paper, we present a novel, separable, backward-central FDTD (SBC-FDTD) method in which both the backward and central differencing are employed to discretize the time and spatial derivatives of the Maxwell's equations. For the type of problems in which the FDTD cell size in one direction is much smaller than those along the other directions, the
null Wenhua Yu, null Tao Su, R. Mittra
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Optical disk structure analysis with finite-difference time domain (FDTD) method
SPIE Proceedings, 2003A method of high-density optical disk structure design using computational electromagnetic FDTD analysis is proposed. A staircase method is used to simulate the realistic sidewall geometrical structure of the land-groove of phase-change optical disk. The phase-change materials appear as different optical characteristics under irradiation of different ...
Jian Ming Li +5 more
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Parallel implementations of the finite difference time domain (FDTD) method
Second International Conference on Computation in Electromagnetics, 1994In this paper different parallel and sequential implementations of the finite difference time domain (FDTD) method are evaluated. The performance of current sequential architectures are first investigated. Possible improved performances from different parallel architectures are then examined.
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Analysis of frequency selective surfaces using the finite difference time domain (FDTD) method
IEEE Antennas and Propagation Society International Symposium (IEEE Cat. No.02CH37313), 2003While the method of moments (MoM) is well suited for analyzing the thin, planar, patch-type of frequency selective surface (FSS) elements, the same cannot be said for arbitrary elements that have a finite thickness, and are inhomogeneous in nature. We employ a periodic version of the finite difference time domain (FDTD) algorithm to analyze the effect ...
N. Farahat, R. Mittra
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A new higher-order subgridding method for finite difference time domain (FDTD) algorithm
IEEE Antennas and Propagation Society International Symposium. 1998 Digest. Antennas: Gateways to the Global Network. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.98CH36194), 2002In this paper the authors present a general subgridding scheme for enhancing the finite difference time domain (FDTD) algorithm. It is different from the conventional approaches in that it does not employ weighted averages of the electric or magnetic fields in the transition zone from the coarse to the fine grid regions, but employs a novel procedure ...
null Wenhua Yu, null Raj Mittra
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Modeling of microwave ring resonators using the finite-difference time-domain method (FDTD)
Microwave and Optical Technology Letters, 2000Scattering parameters of microstrip ring resonators (with and without slits) that are either edge or side coupled to the feedlines are simulated by the FDTD method. The strip conductors on the device can either be infinitely thin or finite in thickness. The simulations predict the occurrence of resonance peak splitting due to the simultaneous existence
Elena Semouchkina, Wenwu Cao, Raj Mittra
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