Analysis Of Periodic Structures Using Finite Difference Time Domain Method
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Scattering Analysis Of Periodic Structures Using Finite Difference Time Domain
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Author : Khaled ElMahgoub
language : en
Publisher: Morgan & Claypool Publishers
Release Date : 2012-05-01
Scattering Analysis Of Periodic Structures Using Finite Difference Time Domain written by Khaled ElMahgoub and has been published by Morgan & Claypool Publishers this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-05-01 with Technology & Engineering categories.
Periodic structures are of great importance in electromagnetics due to their wide range of applications such as frequency selective surfaces (FSS), electromagnetic band gap (EBG) structures, periodic absorbers, meta-materials, and many others. The aim of this book is to develop efficient computational algorithms to analyze the scattering properties of various electromagnetic periodic structures using the finite-difference time-domain periodic boundary condition (FDTD/PBC) method. A new FDTD/PBC-based algorithm is introduced to analyze general skewed grid periodic structures while another algorithm is developed to analyze dispersive periodic structures. Moreover, the proposed algorithms are successfully integrated with the generalized scattering matrix (GSM) technique, identified as the hybrid FDTD-GSM algorithm, to efficiently analyze multilayer periodic structures. All the developed algorithms are easy to implement and are efficient in both computational time and memory usage. These algorithms are validated through several numerical test cases. The computational methods presented in this book will help scientists and engineers to investigate and design novel periodic structures and to explore other research frontiers in electromagnetics. Table of Contents: Introduction / FDTD Method and Periodic Boundary Conditions / Skewed Grid Periodic Structures / Dispersive Periodic Structures / Multilayered Periodic Structures / Conclusions
Analysis Of Periodic Structures Using Finite Difference Time Domain Method
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Author : Khaled ElMahgoub
language : en
Publisher:
Release Date : 2010
Analysis Of Periodic Structures Using Finite Difference Time Domain Method written by Khaled ElMahgoub and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
Periodic structures are of great importance in electromagnetics these days due to their wide range of applications such as frequency selective surfaces (FSS), electromagnetic band gap, periodic absorbers, metamaterials and many others. The aim of this work is to develop several algorithms to analyze different types of electromagnetic periodic structures using the constant horizontal wavenumber finite-difference time-domain periodic boundary condition (FDTD/PBC). A new FDTD/PBC approach is introduced to analyze the scattering properties of general skewed grid periodic structures. The approach is simple to implement and efficient in terms of both computational time and memory usage. In addition, an efficient hybrid FDTD generalized scattering matrix (GSM) technique is developed to analyze multilayer periodic structure. The technique is based on the FDTD constant horizontal wavenumber approach to compute the scattering parameters of each layer. The new technique saves computational time and storage memory. Moreover, a new algorithm is developed to analyze dispersive periodic structures, the algorithm is easy to implement and efficient in both computational time and memory usage. All the developed algorithms are validated through several numerical test cases.
Scattering Analysis Of Periodic Structures Using Finite Difference Time Domain Method
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Author : Khaled ElMahgoub
language : en
Publisher: Springer Nature
Release Date : 2022-06-01
Scattering Analysis Of Periodic Structures Using Finite Difference Time Domain Method written by Khaled ElMahgoub and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-06-01 with Technology & Engineering categories.
Periodic structures are of great importance in electromagnetics due to their wide range of applications such as frequency selective surfaces (FSS), electromagnetic band gap (EBG) structures, periodic absorbers, meta-materials, and many others. The aim of this book is to develop efficient computational algorithms to analyze the scattering properties of various electromagnetic periodic structures using the finite-difference time-domain periodic boundary condition (FDTD/PBC) method. A new FDTD/PBC-based algorithm is introduced to analyze general skewed grid periodic structures while another algorithm is developed to analyze dispersive periodic structures. Moreover, the proposed algorithms are successfully integrated with the generalized scattering matrix (GSM) technique, identified as the hybrid FDTD-GSM algorithm, to efficiently analyze multilayer periodic structures. All the developed algorithms are easy to implement and are efficient in both computational time and memory usage. These algorithms are validated through several numerical test cases. The computational methods presented in this book will help scientists and engineers to investigate and design novel periodic structures and to explore other research frontiers in electromagnetics. Table of Contents: Introduction / FDTD Method and Periodic Boundary Conditions / Skewed Grid Periodic Structures / Dispersive Periodic Structures / Multilayered Periodic Structures / Conclusions
Numerical Analysis Of Periodic Structures For Microwave And Infrared Applications With The Finite Difference Time Domain Fdtd Method
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Author : Rui Qiang
language : en
Publisher:
Release Date : 2007
Numerical Analysis Of Periodic Structures For Microwave And Infrared Applications With The Finite Difference Time Domain Fdtd Method written by Rui Qiang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Electromagnetic waves categories.
Finite Difference Time Domain Analysis Of Periodic Anisotropic Media
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Author :
language : en
Publisher:
Release Date : 2004
Finite Difference Time Domain Analysis Of Periodic Anisotropic Media written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
The Finite-Difference Time-Domain (FDTD) method is a numerical technique for solving electromagnetic propagation and scattering problems. The FDTD method has been one of the most popular numerical tools in the computational electromagnetics since Kane Yee proposed his efficient and stable algorithm, often called the Yee algorithm. Recent rapid development in computer technologies in the last two decades allows us to have more power in computation and memory capacity, which overcomes the computationally intensive nature, the main hindrance of wide use of the FDTD method. Still, emerging new applications need modification to the original FDTD algorithm. For the applications of periodic structures such as gratings and photonic crystals, the FDTD method can be much more efficient and accurate by taking the advantage of the periodicity of structures. The simulation space can be dramatically reduced into only one unit cell by enforcing periodic boundary conditions (PBC). An efficient way of implementing PBCs is the split-field update method. The main advantage of the split-field FDTD method is its capability of wideband simulation at oblique incidence. However, the previous works were limited to materials that are either isotropic or that have diagonal tensors. Here we present a modified FDTD algorithm for periodic structures in more general anisotropic media, which incorporates the nondiagonal permittivity tensor. PBCs are implemented by using the split-field technique. Validation of the new FDTD method is done by applying it for problems of different structures and comparing the results from FDTD simulations with other analytical or numerical solutions. We report a rigorous numerical analysis of the Polarization Grating (PG) at the first time. Diffraction properties such as the diffraction efficiency and the polarization selectivity of each diffraction order are analyzed for all kinds of PGs. We discuss the effect of the grating regimes and the finite grating width on t.
Efficient Time Domain Modeling Of Periodic Structure Related Microwave And Optical Geometries
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Author : Dongying Li
language : en
Publisher:
Release Date : 2011
Efficient Time Domain Modeling Of Periodic Structure Related Microwave And Optical Geometries written by Dongying Li and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Efficient Time Domain Modeling Of Periodic Structure Based Microwave And Optical Geometries
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Author : Dongying Li
language : en
Publisher:
Release Date : 2011
Efficient Time Domain Modeling Of Periodic Structure Based Microwave And Optical Geometries written by Dongying Li and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
A set of tools are proposed for the efficient modeling of several classes of problems related to periodic structures in microwave and optical regimes with Finite-Difference Time-Domain method. The first category of problems under study is the interaction of non-periodic sources and printed elements with infinitely periodic structures. Such problems would typically require a time-consuming simulation of a finite number of unit cells of the periodic structures, chosen to be large enough to achieve convergence. To alleviate computational cost, the sine-cosine method for the Finite-Difference Time-Domain based dispersion analysis of periodic structures is extended to incorporate the presence of non-periodic, wideband sources, enabling the fast modeling of driven periodic structures via a small number of low cost simulations. The proposed method is then modified for the accelerated simulation of microwave circuit geometries printed on periodic substrates. The scheme employs periodic boundary conditions applied at the substrate, to dramatically reduce the computational domain and hence, the cost of such simulations. Emphasis is also given on radiation pattern calculation, and the consequences of the truncated computational domain of the proposed method on the computation of the electric and magnetic surface currents invoked in the near-to-far-field transformation. It has been further demonstrated that from the mesh truncation point of view, the scheme, which has a unified form regardless dispersion and conductivity, serves as a much simpler but equally effective alternative to the Perfectly Matched Layer provided that the simulated domain is periodic in the direction of termination. The second category of problems focuses on the efficient characterization of nonlinear periodic structures. In Finite-Difference Time-Domain, the simulation of these problems is typically hindered by the fine spatial and time gridding. Originally proposed for linear structures, the Alternating-Direction Implicit Finite-Difference Time-Domain method, as well as a novel spatial filtering method, are extended to incorporate nonlinear media. Both methods are able to use time-step sizes beyond the conventional stability limit, offering significant savings in simulation time.
Computational Nanotechnology Using Finite Difference Time Domain
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Author : Sarhan M. Musa
language : en
Publisher: CRC Press
Release Date : 2017-12-19
Computational Nanotechnology Using Finite Difference Time Domain written by Sarhan M. Musa and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-12-19 with Science categories.
The Finite Difference Time Domain (FDTD) method is an essential tool in modeling inhomogeneous, anisotropic, and dispersive media with random, multilayered, and periodic fundamental (or device) nanostructures due to its features of extreme flexibility and easy implementation. It has led to many new discoveries concerning guided modes in nanoplasmonic waveguides and continues to attract attention from researchers across the globe. Written in a manner that is easily digestible to beginners and useful to seasoned professionals, Computational Nanotechnology Using Finite Difference Time Domain describes the key concepts of the computational FDTD method used in nanotechnology. The book discusses the newest and most popular computational nanotechnologies using the FDTD method, considering their primary benefits. It also predicts future applications of nanotechnology in technical industry by examining the results of interdisciplinary research conducted by world-renowned experts. Complete with case studies, examples, supportive appendices, and FDTD codes accessible via a companion website, Computational Nanotechnology Using Finite Difference Time Domain not only delivers a practical introduction to the use of FDTD in nanotechnology but also serves as a valuable reference for academia and professionals working in the fields of physics, chemistry, biology, medicine, material science, quantum science, electrical and electronic engineering, electromagnetics, photonics, optical science, computer science, mechanical engineering, chemical engineering, and aerospace engineering.
Hybrid Fdtd Analysis For Periodic On Chip Terahertz Thz Structures
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Author : Yasser A. Hussein
language : en
Publisher:
Release Date : 2005
Hybrid Fdtd Analysis For Periodic On Chip Terahertz Thz Structures written by Yasser A. Hussein and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
We present electromagnetic analysis and radiation efficiency calculations for on-chip terahertz (THz) structures based on a hybrid, finite-difference, time-domain (HFDTD) technique. The method employs the FDTD technique to calculate S-parameters for one cell of a periodic structure. The transmission ABCD matrix is then estimated and multiplied by itself n times to obtain the n-cell periodic structure ABCD parameters that are then converted back to S-parameters. Validation of the method is carried out by comparing the results of the hybrid technique with FDTD calculations of the entire periodic structure as well as with HFSS which all agree quite well. This procedure reduces the CPU-time and allows efficient design and optimization of periodic THz radiation sources. Future research will involve coupling of Maxwell's equations with a more detailed, physics-based transport model for higher-order effects.
The Finite Difference Time Domain Method For Electromagnetics With Matlab Simulations
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Author : Atef Z. Elsherbeni
language : en
Publisher: IET
Release Date : 2015-11-25
The Finite Difference Time Domain Method For Electromagnetics With Matlab Simulations written by Atef Z. Elsherbeni and has been published by IET this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-11-25 with Computers categories.
This is one of the best books on computational electromagnetics both for graduate students focusing on electromagnetics problems and for practicing engineering professionals in industry and government. It is designed as an advanced textbook and self-study guide to the FDTD method of solving EM problems and simulations. This latest edition has been expanded to include 5 entirely new chapters on advanced topics in the mainstream of FDTD practice. In addition to advanced techniques it also includes applications and examples, and some 'tricks and traps' of using MATLAB to achieve them. Compared to the previous version the second edition is more complete and is a good reference for someone who is performing FDTD research. This book is part of the ACES Series on Computational Electromagnetics and Engineering. Supplementary material can be found at the IET's ebook page Supplementary materials for professors are available upon request via email to [email protected].