Results 21 to 30 of about 11,025,573 (223)

Analyzing electromagnetic structures with curved boundaries on Cartesian FDTD meshes [PDF]

, 1998
In this paper, a new finite-difference time-domain (FDTD) algorithm is investigated to analyze electromagnetic structures with curved boundaries using a Cartesian coordinate system. The new algorithm is based on a nonorthogonal FDTD method. However, only
Railton, CJ, Hao, Y
core   +1 more source

The treatment of geometrically small structures in FDTD by the modification of assigned material parameters [PDF]

, 2005
A number of different improvements to the analysis by finite-difference time-domain (FDTD) of small structures, such as wires, strips and slots have been proposed in the literature.
Paul, DL, Railton, CJ, Craddock, IJ, Hilton, GS   +3 more
core   +1 more source

Narrow strip above ground plane transmission line formulation in the FDTD algorithm [PDF]

, 2004
A number of thin wire formalisms for use in the FDTD method have been published over the years. One such formalism was published by Holland and Simpson (IEEE Trans., EMC-23, no. 2, pp. 88-97, 1981). Later, Ledfelt (Ph.D.
C.J. Railton, I.J. Craddock, Railton, CJ, B.P. Koh, Craddock, IJ, Koh, BP   +5 more
core   +1 more source

Efficacious GPR Implementations of Z-Transform-Based Hybrid LOD-FDTD with Subgridding Scheme: Theoretical Formalism and Numerical Study

Remote Sensing, 2022
Ground penetrating radar (GPR) forward modeling is one of the core geophysical research topics and also the primary task of simulating ground penetrating radar system.
Guoda Xie, Ziheng Song, Guilin Hou, Ming Fang, Naixing Feng, Zhixiang Huang   +5 more
doaj   +1 more source

Newmark-FDTD Formulation for Modified Lorentz Dispersive Medium and Its Equivalence to Auxiliary Differential Equation-FDTD with Bilinear Transformation

International Journal of Antennas and Propagation, 2019
The finite-difference time-domain (FDTD) method has been popularly utilized to analyze the electromagnetic (EM) wave propagation in dispersive media. Various dispersion models were introduced to consider the frequency-dependent permittivity, including ...
Hongjin Choi, Jeahoon Cho, Yong Bae Park, Kyung-Young Jung   +3 more
doaj   +1 more source

Efficient Finite-Difference Time-Domain Modeling of Time-Varying Dusty Plasma [PDF]

Journal of Electromagnetic Engineering and Science, 2022
The finite-difference time-domain (FDTD) method has been widely used for the electromagnetic analysis of dusty plasma sheath in reentering hypersonic vehicles.
Yong-Jin Kim, Jeahoon Cho, Kyung-Young Jung   +2 more
doaj   +1 more source

Local Explosion Detection and Infrasound Localization by Reverse Time Migration Using 3-D Finite-Difference Wave Propagation

Frontiers in Earth Science, 2021
Infrasound data are routinely used to detect and locate volcanic and other explosions, using both arrays and single sensor networks. However, at local distances (<15 km) topography often complicates acoustic propagation, resulting in inaccurate ...
David Fee, Liam Toney, Keehoon Kim, Richard W. Sanderson, Alexandra M. Iezzi, Alexandra M. Iezzi, Robin S. Matoza, Silvio De Angelis, Arthur D. Jolly, John J. Lyons, Matthew M. Haney   +10 more
doaj   +1 more source

Optimized 3D Finite-Difference-Time-Domain Algorithm to Model the Plasmonic Properties of Metal Nanoparticles with Near-Unity Accuracy

Chemosensors, 2021
The finite difference time domain (FDTD) method is a grid-based, robust, and straightforward method to model the optical properties of metal nanoparticles (MNPs).
Mehran Rafiee, Subhash Chandra, Hind Ahmed, Sarah J. McCormack   +3 more
doaj   +1 more source

Novel Time-Domain Electromagnetic Simulation Using Triangular Meshes by Applying Space Curvature

IEEE Open Journal of Antennas and Propagation, 2020
A novel stable, accurate and fast numerical method based on triangular meshing and space transformations for electrodynamics problems with arbitrary boundaries is developed.
M. R. Kazemzadeh, N. G. R. Broderick, W. Xu   +2 more
doaj   +1 more source

Research on karst collapse pillar imaging of water-rich area in coal mine

Gong-kuang zidonghua, 2019
In order to solve the problem that selection of time step was limited by Courant-Friedrich-Lewy stability condition in current finite-difference time-domain(FDTD) method commonly used in advanced detection transient electromagnetic method of water-rich ...
TIAN Feng, JIAO Cuicui, HAN Xiaobing
doaj   +1 more source