Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 56 for “"FDTD method"”.
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An investigation of alternating-direction implicit finite-difference time-domain (ADI-FDTD) method in numerical electromagnetics
… this thesis, the alternating-direction implicit method (ADI) is investigated in conjunction with the finite difference time-domain method (FDTD) to allow crossing of the Courant-Friedrich-Levy (CFL) stability criterion while maintaining stability in the FDTD algorithm. The main reason for this is …
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Implementation of the Finite Difference Time Domain algorithm for the analysis of terahertz waves
… of the Finite Difference Time Domain (FDTD) method for the study of various devices at terahertz frequencies. The FDTD method has emerged as one of the most widely used numerical analysis methods used for electromagnetic simulations. The FDTD method can be used to solve numerous types …
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Efficient solution of Maxwell's equations using the nonuniform orthogonal finite difference time domain method
The Finite Difference Time Domain (FDTD) method is limited by memory requirements and computation time when applied to large problems, complicated geometries, or geometries with fine features. In this thesis, the nonuniform orthogonal FDTD method is presented and applied to a variety of …
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Finite element time domain method with a unique coupled mesh system for electromagnatics and photonics
The finite difference time domain (FDTD) method is a popular technique, being used successfully to analyse the electromagnetic properties of many structures, including a range of optical or photonic devices. This method offers several major advantages such as, a minimum level of calculation is …
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ADVANCED IMPLEMENTATIONS OF THE ITERATIVE MULTI REGION TECHNIQUE
… of the finite-difference time-domain (FDTD) method into the iterative multi-region (IMR) technique, an iterative approach used to solve large-scale electromagnetic scattering and radiation problems, is presented in this dissertation. The idea of the IMR technique is to divide a large …
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Development and application of hybrid finite methods for solution of time dependent maxwell's equations
… to the finite element time domain (FETD) method, the finite difference time domain (FDTD) method and the hybrid FETD-FDTD method are proposed along with the application of the hybrid method for modeling and simulation of electromagnetic radiation from antennas. Firstly, a solution for the …
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Matrix-free time-domain methods for general electromagnetic analysis
… of large-scale problems. If a computational method can be made free of matrix solutions, then it has a potential of solving very large scale problems. Among existing computational electromagnetic methods, the explicit finite-difference time-domain (FDTD) method is free of matrix solutions. …
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Broadband whole package FDTD simulation
… of this thesis is to find and implement a new method for broadband whole package simulation. 3-dimension (3-D) whole package Finite Difference Time Domain (FDTD) simulation result was first reported in detail in this thesis. The FDTD method is a widely used full-wave time-domain simulation …
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Recent Development in Low Frequency Integral Equation Method
… to model the seabed logging problem. The popular method to model the problem is the finite-difference time-domain (FDTD) method, which suffers from very large number of marching steps because the time step is small and the operating frequency is low. Our numerical results show several orders …
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Interference Modelling for Indoor Wireless Systems using the Finite-Difference Time-Domain Method
… such as the Finite-Difference Time- Domain (FDTD) method, limits their applicability for day-to-day system planning purposes at this stage. The research presented in this thesis describes a series of FDTD investigations of the indoor radio channel, using two- and three-dimensional geometries, …
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System level ESD failure mechanisms, analysis and test method
… contact mode are numerically simulated using the FDTD method...The second and the third papers derived a reference ESD event for human-metal ESD from measured discharges...In the fourth paper, a three dimensional ESD scanning system which has been developed to record the ESD susceptibility map for …
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A new finite-difference time-domain method applied to an open waveguide structure.
… variation of the Finite-Difference Time-Domain (FDTD) method as first proposed by Yee to simulate electromagnetic field distribution and propagation in an open waveguide structure. In order to prove that this new method is valid, a reflection coefficient is calculated with simulation data and …
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Efficient modeling of passive electronic devices using the finite-difference time domain method
… using the Finite Difference Time Domain (FDTD) algorithm for solving Maxwell's equations. One of the fundamental problems associated with analyzing this class of structures is that accurate modeling of their fine features typically requires a large mesh and an exorbitant amount of …
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Linear system identification technique by time series analysis
… systems using the finite difference time-domain (FDTD) method is inaccurate and problematic. This thesis investigates the use of time series analysis techniques for estimating parameters of a continuous-time (CT) model of linear dynamic systems. This application of time series analysis for system …
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FDTD subgridding with higher order derivative approximations
The finite-difference time-domain (FDTD) method provides numeric solutions to analyze electromagnetic problems. This includes modeling wave propagation through urban environments, wireless communications, radio-frequency identification (RFID), and antenna design. As the operating frequency …
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Efficient mesh truncation techniques for the solution of Maxwell's equations using the finite-difference time domain method
… of the Finite Difference Time Domain (FDTD) method to open region radiation problems requires the truncation of the infinite domain down to a finite-sized domain amenable to numerical simulation. The accuracy of the solution and the computational expense required to attain the solution …
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Matched interface and boundary enhanced multiresolution time-domain algorithm for electromagnetic simulations
… boundary multiresolution time-domain (MIBMRTD) method is introduced to overcome this difficulty. Several numerical benchmark tests are carried out to valid the MIB-MRTD method. Dispersion and stability analysis for the MIB-MRTD method are conducted and compared with the high-order finite …
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Hybrid explicit-implicit FDTD-FEM time-domain solver for electromagnetic problems
The Finite-Difference Time-Domain (FDTD) method and Finite-Element (FEM) method are numerical techniques used for solving Maxwell's electromagnetic equations. FDTD-FEM hybrid methods opt for combining the advantages of both FDTD and FEM. In this dissertation, signal processing techniques were used …
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Computation of electromagnetic fields in assemblages of biological cells using a modified finite difference time domain scheme. Computational electromagnetic methods using quasi-static approximate version of FDTD, modified Berenger absorbing boundary and Floquet periodic boundary conditions to investigate the phenomena in the interaction between EM fields and biological systems.
… EM field is the Finite-Difference Time-Domain (FDTD) method. When modelling objects that are small compared with the wavelength, for example biological cells at radio frequencies, the standard Finite-Difference Time-Domain (FDTD) method requires extremely small time-step sizes, which may lead to …
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