In this paper, the finite-difference time-domain (FDTD) method is applied to calculate the resonant frequency of dielectric resonators (DR’s) with curved surface. The contour-path integral FDTD (CFDTD) is modified to deal with the curved surface of the dielectric body while the traditional rectangular cells are maintained. Results are compared with theoretical values and staircase approximation...

We discuss the parallelization of a Velocity-Stress FDTD (VS-FDTD) code for the simulation of the propagation of mechanical waves in three-dimensional microstructures. The C++ code has been parallelized using MPI making extensive use of the Blitz++ library for local computation. We present numerical results for pyramid shaped domains, representing the tip of a focusing lens, that we have obtain...

In this study, a new method is introduced to reduce the splitting error in the ADI-FDTD method using iterative method. The proposed method includes two procedures. First we solve the procedure of ADI-FDTD method and secondly a new iterative scheme is adopted. The improvement of reduced splitting error is investigated by numerical examples. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Le...

In this paperwe review a recently developed finite-difference time-domain (FDTD) iterative technique for the analysis of periodic structures at oblique incidence.We showhow it can be implemented in FDTD code and estimate required computer memory and time resources. To illustrate performance of our technique we demonstrate the plasmon formation in a thin gold film placed at air/glass interface a...

This paper presents the results of measurements and simulations of the characteristics of 900 MHz band radio propagation channels in a tunnel environment. The simulations were made using the FDTD method (with companion UPML) and measurements made use of the swept frequency technique. Another method, the metaheuristic Simulated Annealing, was implemented for estimating the values of characterist...

The space and time discretization inherent to all FDTD schemes introduce non-physical dispersion errors, i.e. deviations of the speed of sound from the theoretical value predicted by the governing Euler differential equations. A general methodology for computing this dispersion error via straightforward numerical simulations of the FDTD schemes is presented. The method is shown to provide remar...

Triggered by the release in Feb., 2002 by the Federal Communications Commission of their first authorization for UWB[1], UWB research has been making fast progress across the world. The applications of UWB technology range from multimedia communications, through radar and biomedical image reconstruction, to positioning. Most of the system development for these applications requires the numerica...

A Finite Difference Time Domain (FDTD) scheme used to model the wave propagation in biological dispersive media has been proposed in this paper. FDTD scheme based on the direct solution of time domain Maxwell’s equations has developed and these solutions were approximated by time based linear functions. We are applied FDTD scheme for different dispersive media models such as Cole-Cole, Cole-Dav...

Time modulated linear antenna arrays consisting of printed dipoles above a ground plane are simulated using the finitedifference time-domain (FDTD) method. The FDTD method brings great convenience to the investigation of the time domain responses of the time modulated arrays. In conjunction with the near-to-far field transformation in time domain, the far-field transient response can be compute...