Download or read book Numerical Solution of Antennas in Layered Media written by Volkert W. Hansen and published by Wiley-Blackwell. This book was released on 1989 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph presents a variety of methods for the numerical solution of practical problems (especially transient responses in layered media) which occur in microwave antenna installations. Provides a survey of the present state of research, covering the modern applications of methods such as Green's function and the Sommerfield integrals, to practical problems involving dipoles, focusing antennas, and model calculations.
Download or read book Computational Electromagnetics for RF and Microwave Engineering written by David B. Davidson and published by Cambridge University Press. This book was released on 2005-02-24 with total page 413 pages. Available in PDF, EPUB and Kindle. Book excerpt: The numerical approximation of Maxwell's equations, Computational Electromagnetics (CEM), has emerged as a crucial enabling technology for radio-frequency, microwave and wireless engineering. The three most popular 'full-wave' methods - the Finite Difference Time Domain Method, the Method of Moments and the Finite Element Method - are introduced in this book by way of one or two-dimensional problems. Commercial or public domain codes implementing these methods are then applied to complex, real-world engineering problems, and a careful analysis of the reliability of the results obtained is performed, along with a discussion of the many pitfalls which can result in inaccurate and misleading solutions. The book will empower readers to become discerning users of CEM software, with an understanding of the underlying methods, and confidence in the results obtained. It also introduces readers to the art of code development. Aimed at senior undergraduate/graduate students taking CEM courses and practising engineers in the industry.
Download or read book Mathematical Models and Numerical Methods for Full Wave Analysis of Prolate and Oblate Spheroidal Conformal Microwave Components written by Saif Al-Hasson and published by Cuvillier Verlag. This book was released on 2014-08-29 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conformal components are used nowadays at higher rate than ever before. They can be found in curved mobile phones, communication, navigation, and imaging systems in land, water, air, and space vehicles. The integration of those components within the external structure became of significant importance for aerodynamic, electromagnetic, aesthetic, or physical reasons. As a result, many mathematical models were previously developed to analyze and optimize such conformed devices. In this thesis, we contributed to this field by developing various models for full wave analysis of spheroidal components. As a starting point, mathematical formulas for conforming antennas on oblate and prolate spheroids were obtained. Those conformation methods were validated by conforming many antennas on spheroidal surfaces. They were then used to formulate Method of Moments equations with spheroidally curved current functions for analyzing wire antennas of random shape conformed to spheroids in the frequency domain. The complete model was applied to a conformal Archimedean spiral antenna on an oblate spheroid and showed that the conformed spiral has similar current distribution as its planar counterpart but produces an unsymmetrical radiation pattern. The obtained model was then extended to spheroidal multi-layer structures by integrating the spheroidal dyadic Green’s Function within its mathematical derivation. However, due to a detected divergence in that function, the model couldn’t be implemented. On the side of time based analysis methods, a Finite Difference Time Domain method was developed for closed oblate and prolate spheroidal structures. Alternative formulas for the structure’s singularities and the condition of numerical stability were derived as well. The obtained model was then validated and used to characterize spheroidal cavities in the time and frequency domains. The method was extended later to unbounded spheroidal domain by deriving the Absorbing Boundary Conditions using the One Way Wave method. The whole model was then applied to characterize a patch antenna conformed to a prolate spheroid. Finally, an analytical solution for the transient fields in spherical multilayer media energized by spherical harmonics source and an algorithm for tracing back the path of all the reflected waves were obtained. The model was applied to different multilayer structures where the transient response was obtained and validated against a numerical solution.
Download or read book Computational Methods for Electromagnetic and Optical Systems Second Edition written by John M. Jarem and published by CRC Press. This book was released on 2011 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text examines a variety of spectral computational techniques— including k-space theory, Floquet theory and beam propagation— that are used to analyze electromagnetic and optical problems. The authors tie together different applications in EM and optics in which the state variable method is used. Emphasizing the analysis of planar diffraction gratings using rigorous coupled wave analysis, the book presents many cases that are analyzed using a full-field vector approach to solve Maxwell’s equations in anisotropic media where a standard wave equation approach is intractable.
Download or read book Antenna Theory and Design written by Warren L. Stutzman and published by John Wiley & Sons. This book was released on 2012-05-22 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stutzman's 3rd edition of Antenna Theory and Design provides a more pedagogical approach with a greater emphasis on computational methods. New features include additional modern material to make the text more exciting and relevant to practicing engineers; new chapters on systems, low-profile elements and base station antennas; organizational changes to improve understanding; more details to selected important topics such as microstrip antennas and arrays; and expanded measurements topic.
Download or read book Computational Methods and Experimental Measurements XIII written by C. A. Brebbia and published by WIT Press. This book was released on 2007 with total page 929 pages. Available in PDF, EPUB and Kindle. Book excerpt: Containing papers presented at the Thirteenth International Conference in this well established series on (CMEM) Computational Methods and Experimental Measurements. These proceedings review state-of-the-art developments on the interaction between numerical methods and experimental measurements.Featured topics include: Computational and Experimental Methods; Experimental and Computaqional Analysis; Computer Interaction and Control of Experiments; Direct, Indirect and In-Situ Measurements; Particle Methods; Structural and Stress Analysis; Structural Dynamics; Dynamics and Vibrations; Electrical and Electromagnetic Applications; Biomedical Applications; Heat Transfer; Thermal Processes; Fluid Flow; Data Acquisition; Remediation and Processing and Industrial Applications.
Download or read book Computational Methods for Electromagnetic and Optical Systems written by John M. Jarem and published by CRC Press. This book was released on 2016-04-19 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: The current rapid and complex advancement applications of electromagnetic (EM) and optical systems calls for a much needed update on the computational methods currently in use. Completely revised and reflecting ten years of develoments, this second edition of the bestselling Computational Methods for Electromagnetic and Optical Systems provides the
Download or read book Theoretical Modelling and Numerical Simulations Toward Industry 4 0 written by Samsul Ariffin Abdul Karim and published by Springer Nature. This book was released on 2020-11-17 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents theoretical modeling and numerical simulations applied to drive several applications towards Industrial Revolution 4.0 (IR 4.0). The topics discussed range from theoretical parts to extensive simulations involving many efficient algorithms as well as various statistical techniques. This book is suitable for postgraduate students, researchers as well as other scientists who are working in mathematics, statistics and numerical modeling and simulation.
Download or read book EM Modeling of Antennas and RF Components for Wireless Communication Systems written by Frank Gustrau and published by Springer Science & Business Media. This book was released on 2006-08-02 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on practical computational electrodynamics, guiding the reader step-by-step through the modeling process from the initial "what question must the model answer?", through the setting up of a computer model, to post processing, validation and optimization. The book offers a realistic view of the capabilities and limits of current 3-D field simulators and how to apply this knowledge efficiently to EM analysis and design of RF applications in modern communication systems.
Download or read book Advances in Time Domain Computational Electromagnetic Methods written by Qiang Ren and published by John Wiley & Sons. This book was released on 2022-11-15 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Time-Domain Computational Electromagnetic Methods Discover state-of-the-art time domain electromagnetic modeling and simulation algorithms Advances in Time-Domain Computational Electromagnetic Methods delivers a thorough exploration of recent developments in time domain computational methods for solving complex electromagnetic problems. The book discusses the main time domain computational electromagnetics techniques, including finite-difference time domain (FDTD), finite-element time domain (FETD), discontinuous Galerkin time domain (DGTD), time domain integral equation (TDIE), and other methods in electromagnetic, multiphysics modeling and simulation, and antenna designs. The book bridges the gap between academic research and real engineering applications by comprehensively surveying the full picture of current state-of-the-art time domain electromagnetic simulation techniques. Among other topics, it offers readers discussions of automatic load balancing schemes for DG-FETD/SETD methods and convolution quadrature time domain integral equation methods for electromagnetic scattering. Advances in Time-Domain Computational Electromagnetic Methods also includes: Introductions to cylindrical, spherical, and symplectic FDTD, as well as FDTD for metasurfaces with GSTC and FDTD for nonlinear metasurfaces Explorations of FETD for dispersive and nonlinear media and SETD-DDM for periodic/ quasi-periodic arrays Discussions of TDIE, including explicit marching-on-in-time solvers for second-kind time domain integral equations, TD-SIE DDM, and convolution quadrature time domain integral equation methods for electromagnetic scattering Treatments of deep learning, including time domain electromagnetic forward and inverse modeling using a differentiable programming platform Ideal for undergraduate and graduate students studying the design and development of various kinds of communication systems, as well as professionals working in these fields, Advances in Time-Domain Computational Electromagnetic Methods is also an invaluable resource for those taking advanced graduate courses in computational electromagnetic methods and simulation techniques.
Download or read book Journal of Research written by United States. National Bureau of Standards and published by . This book was released on 1962 with total page 946 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Perfectly Matched Layer PML for Computational Electromagnetics written by Jean-Pierre Bérenger and published by Springer Nature. This book was released on 2022-06-01 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt: This lecture presents the perfectly matched layer (PML) absorbing boundary condition (ABC) used to simulate free space when solving the Maxwell equations with such finite methods as the finite difference time domain (FDTD) method or the finite element method. The frequency domain and the time domain equations are derived for the different forms of PML media, namely the split PML, the CPML, the NPML, and the uniaxial PML, in the cases of PMLs matched to isotropic, anisotropic, and dispersive media. The implementation of the PML ABC in the FDTD method is presented in detail. Propagation and reflection of waves in the discretized FDTD space are derived and discussed, with a special emphasis on the problem of evanescent waves. The optimization of the PML ABC is addressed in two typical applications of the FDTD method: first, wave-structure interaction problems, and secondly, waveguide problems. Finally, a review of the literature on the application of the PML ABC to other numerical techniques of electromagnetics and to other partial differential equations of physics is provided. In addition, a software package for computing the actual reflection from a FDTD-PML is provided. It is available here.
Download or read book Absorbing Boundaries and Layers Domain Decomposition Methods written by L. Tourrette and published by Nova Publishers. This book was released on 2001 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: CD-ROM contains: Sections omitted from printing of text.
Download or read book Topics in Computational Wave Propagation written by Mark Ainsworth and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: These ten detailed and authoritative survey articles on numerical methods for direct and inverse wave propagation problems are written by leading experts. Researchers and practitioners in computational wave propagation, from postgraduate level onwards, will find the breadth and depth of coverage of recent developments a valuable resource. The articles describe a wide range of topics on the application and analysis of methods for time and frequency domain PDE and boundary integral formulations of wave propagation problems. Electromagnetic, seismic and acoustic equations are considered. Recent developments in methods and analysis ranging from finite differences to hp-adaptive finite elements, including high-accuracy and fast methods are described with extensive references.
Download or read book Electromagnetics written by Edward J. Rothwell and published by CRC Press. This book was released on 2018-04-17 with total page 1213 pages. Available in PDF, EPUB and Kindle. Book excerpt: Providing an ideal transition from introductory to advanced concepts, this book builds a foundation that allows electrical engineers to confidently proceed with the development of advanced EM studies, research, and applications. New topics include quasistatics, vector spherical wave functions, and wave matrices. Several application-oriented sections covering guided waves and transmission lines, particle dynamics, shielding, electromagnetic material characterization, and antennas have also been added. Mathematical appendices present helpful background information in the areas of Fourier transforms, dyadics, and boundary value problems. Key Features Provides extensive end-of-chapter problems. Includes numerous solved examples with detailed explanations and interpretations. Introduces the reader to numerical electromagnetics and integral equations. Each chapter offers an introduction to an important application of electromagnetics. Emphasizes fundamentals, while covering all of the important topics in electromagnetics.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Research of the National Bureau of Standards written by United States. National Bureau of Standards and published by . This book was released on 1962 with total page 862 pages. Available in PDF, EPUB and Kindle. Book excerpt:
