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 160 for “"FDTD"”.
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Broadband whole package FDTD simulation
… 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 method used in the design and analysis for electromagnetic (EM) systems, such as antennas, wave propagating, and …
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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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Optimizing GPU Performance in Cylindrical FDTD Simulations
… methods, such as finite-difference time-domain (FDTD), become infeasible for such problems due to excessive memory and runtime requirements. To address this, several approximate techniques have been developed, including the localized perturbation approximation (LPA), overlapping-domain …
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High Order Energy - Conserved Splitting FDTD Methods for Maxwell's Equations
… spatial fourth order energy-conserved splitting FDTD scheme for Maxwell's equations in two dimensions. For each time stage, while the spatial fourth-order difference operators are used to approximate the spatial derivatives on strict interior nodes, the important feature is that on the near …
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A Complex-Envelope FDTD Formulation Using Real-Valued Field-Variables
… time-step in finite-difference time-domain (FDTD) simulations. The complex envelope representation transforms band-pass limited fields and sources to complex-valued low-pass limited form and Maxwells equations from real-valued partial differential equations (PDEs) to complex-valued PDEs. …
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FDTD Analysis of Plasmonic and Nanojet Enhanced Photodetectors for Improved Performance
The finite-difference time-domain (FDTD) technique is a very flexible and robust means to solve problems spanning a broad range of applications (defense, communication, computing, semiconductor devices and biomedicine), especially where geometrical complexities, nonlinearities and multiphysics …
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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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Remote-sensing of underground caverns using a full-Maxwell's equations FDTD model
… equations finite-difference time-domain (FDTD) modeling is employed to obtain the signatures for different caverns of various depths and dimensions. It is found that by removing the signature of the ground, the presence of an underground structure is detectable.
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Algorithmic design of wind instrument shape via 3D FDTD and deep learning
Traditional design of wind instruments centers around simple shapes such as tubes and cones, whose acoustic properties are well understood and are easily fabricated with traditional manufacturing methods. The advent of additive manufacturing enables the realization of highly complex geometries and …
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Efficient Full-Wave Analysis and Modeling of Interconnects by FDTD and Signal Processing Techniques
… on the Yee-like mesh. The generated parallel FDTD codes are deployed in a cluster environment.
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Development and applications of the cavity model and FDTD for power integrity and EMI problems
"This dissertation discusses four topics relevant to power integrity and EMC."--Abstract, page iv.
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An investigation of alternating-direction implicit finite-difference time-domain (ADI-FDTD) method in numerical electromagnetics
… 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 to be able to use a larger numerical time step than that governed by the CFL criterion. …
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Parallel FDTD Electromagnetic Simulation of Dispersive Plasmonic Nanostructures and Opal Photonic Crystals in the Optical Frequency Range
… problems. Finite Difference Time Domain (FDTD) is the numerical method used for solving the Maxwell's equations and simulating the electromagnetic interaction between the optical radiation and the nanostructures. A modified algorithm for the Drude dispersion is proposed and validated in …
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Integrated full vectorial FEM, FDTD and diffraction integrals in characterising visible light propagation through lossy biological media
… modal solutions, Finite Difference Time Domain (FDTD) is used to study the time evolution of the signals through the waveguides, and the Diffraction profiles have been obtained by Rayleigh-Sommerfeld(RS) diffraction integral.
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Development of an electromagnetic numerical solver based on the finite difference time domain (FDTD) technique for research and teaching purposes
A 1D-FDTD code was developed to support plane wave excitation in 3D-FDTD domain and the code was developed using C++ programming language. First-order Mur absorbing boundary condition (ABC) is applied to keep outgoing electric and magnetic fields from being reflected into the problem space. In this …
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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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Critical analysis of a practical fourth order finite-difference time-domain algorithm for the solution of Maxwell's equations
The finite-difference time-domain (FDTD) method is a highly effective numerical method of solvingMaxwell's equations in the time domain. Traditionally the approximation of the derivatives in Maxwell's equations is based on a central differencing scheme which is second order accurate (second order). …
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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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