Directions In Electromagnetic Wave Modeling

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Terrestrial Propagation Of Long Electromagnetic Waves

Author : Janis Galejs
ISBN : 9781483159560
Genre : Technology & Engineering
File Size : 70.51 MB
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Terrestrial Propagation of Long Electromagnetic Waves deals with the propagation of long electromagnetic waves confined principally to the shell between the earth and the ionosphere, known as the terrestrial waveguide. The discussion is limited to steady-state solutions in a waveguide that is uniform in the direction of propagation. Wave propagation is characterized almost exclusively by mode theory. The mathematics are developed only for sources at the ground surface or within the waveguide, including artificial sources as well as lightning discharges. This volume is comprised of nine chapters and begins with an introduction to the fundamental concepts of wave propagation in a planar and curved isotropic waveguide. A number of examples are presented to illustrate the effects of an anisotropic ionosphere. The basic equations are summarized and plane-wave reflection from a dielectric interface is considered, along with the superposition of two obliquely incident plane waves. The properties of waveguide boundaries are implicitly represented by Fresnel reflection coefficients. Subsequent chapters focus on boundaries of the terrestrial guide; lightning discharges as a natural source of extremely-low-frequency and very-low-frequency radiation; and the mode theory for waves in an isotropic spherical shell. This book will be a useful resource for students and practitioners of physics.
Category: Technology & Engineering

Numerical Modeling For Electromagnetic Non Destructive Evaluation

Author : N. Ida
ISBN : 0412468301
Genre : Technology & Engineering
File Size : 51.93 MB
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This text on numerical methods applied to the analysis of electromagnetic nondestructive testing (NOT) phenomena is the first in a series devoted to all aspects of engineering nondestructive evaluation. The timing of this series is most appropriate as many university engineering/physics faculties around the world, recognizing the industrial significance of the subject, are organizing new courses and programs with engineering NOE as a theme. Additional texts in the series will cover electromagnetics for engineering NOE, microwave NOT methods, ultrasonic testing, radiographic methods and signal processing for NOE. It is the intended purpose of the series to provide senior-graduate level coverage of the material suitable for university curricula and to be generally useful to those in industry with engineering degrees who wish to upgrade their NOE skills beyond those needed for certification. This dual purpose for the series reflects the very applied nature of NOE and the need to develop suitable texts capable of bridging the gap between research laboratory studies of NOE phenomena and the real world of certification and industrial applications. The reader might be tempted to question these assertions in light of the rather mathematical nature of this first text. However, the subject of numerical modeling is of critical importance to a thorough understanding of the field-defect interactions at the heart of all electromagnetic NOT phenomena.
Category: Technology & Engineering

Laws And Models

Author : Carl W. Hall
ISBN : 1420050540
Genre : Technology & Engineering
File Size : 49.87 MB
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The "laws" that govern our physical universe come in many guises-as principles, theorems, canons, equations, axioms, models, and so forth. They may be empirical, statistical, or theoretical, their names may reflect the person who first expressed them, the person who publicized them, or they might simply describe a phenomenon. However they may be named, the discovery and application of physical laws have formed the backbone of the sciences for 3,000 years. They exist by thousands. Laws and Models: Science, Engineering, and Technology-the fruit of almost 40 years of collection and research-compiles more than 1,200 of the laws and models most frequently encountered and used by engineers and technologists. The result is a collection as fascinating as it is useful. Each entry consists of a statement of the law or model, its date of origin, a one-line biography of the people involved in its formulation, sources of information about the law, and cross-references. Illustrated and highly readable, this book offers a unique presentation of the vast and rich collection of laws that rule our universe. Everyone with an interest in the inner workings of nature-from engineers to students, from teachers to journalists-will find Laws and Models to be not only a handy reference, but an engaging volume to read and browse.
Category: Technology & Engineering

Electromagnetic Wave Interactions

Author : Ard‚shir Guran
ISBN : 9810226292
Genre : Science
File Size : 58.53 MB
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This book is a collection of papers on electromagnetic wave mechanics and its applications written by experts in this field. It offers the reader a sampling of exciting research areas in this field. The topics include polarimetric imaging, radar spectroscopy, surface or creeping waves, bistatic radar scattering, the Seebeck affect. Mathematical methods include inverse scattering theory, singularity expansion method, mixed potential integral equation, method of moments, and diffraction theory. Applications include Cellular Mobile Radios (CMR), radar target identification, and Personal Communication Services (PCS). This book shows how electromagnetic wave theory is currently being utilized and investigated. It involves a modicom of mathematical physics and will be of interest to researchers and graduate students in electrical engineering, physics and applied mathematics.
Category: Science

An Introduction To Electromagnetic Wave Propagation And Antennas

Author : Shane Cloude
ISBN : 038791501X
Genre : Technology & Engineering
File Size : 42.53 MB
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This highly illustrated and accessible text will be an ideal introduction to the application of electromagnetics (EM) following an initial course in basic EM theory. The book covers the well established structure of elementary EM courses, beginning with Maxwell’s equations in integral form and developing the wave equation to show the essential properties of waves. In addition to providing a grounding in this traditional curriculum, the principal concern throughout is to make difficult concepts of electromagnetism more accessible. The adoption of time domain methods for this purpose is the book’s most important breakthrough, allowing the fundamentals of applied electromagnetics to be introduced with a clarity and simplicity not available through the conventional route. Another new aspect of this book is the integration of computational modelling methods with the standard theory of electromagnetic waves. The author presents a set of example programs written in the MATLAB language to support the ideas outlined in the text. The book is organized in a logical progression of ideas, starting with the general idea of wave motion and showing how the equations of electricity and magnetism lead to the existence of electromagnetic waves through the Maxwell’s equations. These ideas are then applied to simple accelerating charge models used in the engineering design of wire antennas. The concepts of resonance and antenna impedance are then treated from a time domain point of view. To reinforce the concepts of wave propagation, a chapter on computer modelling shows the rigorous procedures required to generate accurate numerical models of wave dynamics. The author extends these ideas to consider the properties of aperture antennas, showing how their important properties can be incorporated with the basic themes introduced earlier in the book. Finally, the important topic of wave scattering is introduced, once again from the point of view of time domain concepts.
Category: Technology & Engineering

Structural Sensing Health Monitoring And Performance Evaluation

Author : D. Huston
ISBN : 1420012355
Genre : Technology & Engineering
File Size : 90.20 MB
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Structural health monitoring (SHM) uses one or more in situ sensing systems placed in or around a structure, providing real-time evaluation of its performance and ultimately preventing structural failure. Although most commonly used in civil engineering, such as in roads, bridges, and dams, SHM is now finding applications in other engineering environments, such as naval and aerospace engineering. Written by a highly respected expert in the field, Structural Sensing, Health Monitoring, and Performance Evaluation provides the first comprehensive coverage of SHM. The text begins with a review of the various types of sensors currently used in SHM, including point sensors and noncontact systems. Subsequent chapters explain the processing and interpretation of data from a number of sensors working in parallel. After considering issues related to the structures themselves, the author surveys the design of a tailor-made SHM system. He also presents a collection of case studies, many of which are drawn from his own experiences. Exploring the power of sensors, this book shows how SHM technologies can be applied to a variety of structures and systems, including multistory buildings, offshore wind energy plants, and ecological systems.
Category: Technology & Engineering

Em Modeling Of Antennas And Rf Components For Wireless Communication Systems

Author : Frank Gustrau
ISBN : 9783540286158
Genre : Technology & Engineering
File Size : 44.95 MB
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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.
Category: Technology & Engineering

Mathematical Modeling In Optical Science

Author : Gang Bao
ISBN : 0898717590
Genre : Optics
File Size : 47.44 MB
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This volume addresses recent developments in mathematical modeling in three areas of optical science: diffractive optics, photonic band gap structures, and waveguides. Particular emphasis is on the formulation of mathematical models and the design and analysis of new computational approaches. The book contains cutting-edge discourses on emerging technology in optics that provides significant challenges and opportunities for applied mathematicians, researchers, and engineers.
Category: Optics

Star

Author :
ISBN : UIUC:30112057081801
Genre : Aeronautics
File Size : 55.16 MB
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Category: Aeronautics

The Cumulative Book Index

Author :
ISBN : UOM:39015058373997
Genre : American literature
File Size : 47.32 MB
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A world list of books in the English language.
Category: American literature

Complex Electromagnetic Problems And Numerical Simulation Approaches

Author : Levent Sevgi
ISBN : 0471430625
Genre : Science
File Size : 49.5 MB
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Today, engineering problems are very complex, requiring powerful computer simulations to power them. For engineers, observable-based parameterization as well as numerically computable formsâ??with rapid convergent properties if in a seriesâ??are essential. Complex Electromagnetic Problems and Numerical Simulation Approaches, along with its companion FTP site, will show you how to take on complex electromagnetic problems and solve them in an accurate and efficient manner. Organized into two distinct parts, this comprehensive resource first introduces you to the concepts, approaches, and numerical simulation techniques that will be used throughout the book and then, in Part II, offers step-by-step guidance as to their practical, real-world applications. Self-contained chapters will enable you to find specific solutions to numerous problems. Filled with in-depth insight and expert advice, Complex Electromagnetic Problems and Numerical Simulation Approaches: Describes ground wave propagation Examines antenna systems Deals with radar cross section (RCS) modeling Explores microstrip network design with FDTD and TLM techniques Discusses electromagnetic compatibility (EMC) and bio-electromagnetics (BEM) modeling Presents radar simulation Whether you're a professional electromagnetic engineer requiring a consolidated overview of the subject or an academic/student who wishes to use powerful simulators as a learning tool, Complex Electromagnetic Problems and Numerical Simulation Approaches - with its focus on model development, model justification, and range of validity - is the right book for you.
Category: Science

Mathematical Models Of Information And Stochastic Systems

Author : Philipp Kornreich
ISBN : STANFORD:36105131702859
Genre : Mathematics
File Size : 90.30 MB
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From ancient soothsayers and astrologists to today’s pollsters and economists, probability theory has long been used to predict the future on the basis of past and present knowledge. Mathematical Models of Information and Stochastic Systems shows that the amount of knowledge about a system plays an important role in the mathematical models used to foretell the future of the system. It explains how this known quantity of information is used to derive a system’s probabilistic properties. After an introduction, the book presents several basic principles that are employed in the remainder of the text to develop useful examples of probability theory. It examines both discrete and continuous distribution functions and random variables, followed by a chapter on the average values, correlations, and covariances of functions of variables as well as the probabilistic mathematical model of quantum mechanics. The author then explores the concepts of randomness and entropy and derives various discrete probabilities and continuous probability density functions from what is known about a particular stochastic system. The final chapters discuss information of discrete and continuous systems, time-dependent stochastic processes, data analysis, and chaotic systems and fractals. By building a range of probability distributions based on prior knowledge of the problem, this classroom-tested text illustrates how to predict the behavior of diverse systems. A solutions manual is available for qualifying instructors.
Category: Mathematics

Electromagnetic Wave Scattering From Random Rough Surfaces

Author : Nicolas Pinel
ISBN : 9781118579466
Genre : Science
File Size : 21.91 MB
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Electromagnetic wave scattering from random rough surfaces is anactive, interdisciplinary area of research with myriad practicalapplications in fields such as optics, acoustics, geoscience andremote sensing. Focusing on the case of random rough surfaces, this book presentsclassical asymptotic models used to describe electromagnetic wavescattering. The authors begin by outlining the basic conceptsrelevant to the topic before moving on to look at the derivation ofthe scattered field under asymptotic models, based on theKirchhoff-tangent plane, in order to calculate both the scatteredfield and the statistical average intensity. More elaborated asymptotic models are also described for dealingwith specific cases, and numerical results are presented toillustrate these models. Comparisons with a reference numericalmethod are made to confirm and refine the theoretical validitydomains. The final chapter derives the expressions of the scatteringintensities of random rough surfaces under the asymptotic models.Its expressions are given for their incoherent contributions, fromstatistical calculations. These results are then compared withnumerical computations using a Monte-Carlo process, as well as withexperimental models, for sea surface backscattering. Contents 1. Electromagnetic Wave Scattering from Random Rough Surfaces:Basics. 2. Derivation of the Scattered Field under Asymptotic Models. 3. Derivation of the Normalized Radar Cross-Section underAsymptotic Models. APPENDIX 1. Far-Field Scattered Fields under the Method ofStationary Phase. APPENDIX 2. Calculation of the Scattering Coefficients under the GOfor 3D Problems. About the Authors Nicolas Pinel worked as a Research Engineer at the IETR(Institut d’Electronique et de Télécommunicationsde Rennes) laboratory at Polytech Nantes (University of Nantes,France) before joining Alyotech Technologies in Rennes, France, inJuly 2013. His research interests are in the areas of radar andoptical remote sensing, scattering and propagation. In particular,he works on asymptotic methods of electromagnetic wave scatteringfrom random rough surfaces and layers. Christophe Bourlier works at the IETR (Institutd’Electronique et de Télécommunications de Rennes)laboratory at Polytech Nantes (University of Nantes, France) and isalso a Researcher at the French National Center for ScientificResearch (CNRS) on electromagnetic wave scattering from roughsurfaces and objects for remote sensing applications and radarsignatures. He is the author of more than 160 journal articles andconference papers.
Category: Science

Electromagnetic Waves

Author : Carlo G. Someda
ISBN : 1420009540
Genre : Technology & Engineering
File Size : 47.56 MB
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Adapted from a successful and thoroughly field-tested Italian text, the first edition of Electromagnetic Waves was very well received. Its broad, integrated coverage of electromagnetic waves and their applications forms the cornerstone on which the author based this second edition. Working from Maxwell's equations to applications in optical communications and photonics, Electromagnetic Waves, Second Edition forges a link between basic physics and real-life problems in wave propagation and radiation. Accomplished researcher and educator Carlo G. Someda uses a modern approach to the subject. Unlike other books in the field, it surveys all major areas of electromagnetic waves in a single treatment. The book begins with a detailed treatment of the mathematics of Maxwell's equations. It follows with a discussion of polarization, delves into propagation in various media, devotes four chapters to guided propagation, links the concepts to practical applications, and concludes with radiation, diffraction, coherence, and radiation statistics. This edition features many new and reworked problems, updated references and suggestions for further reading, a completely revised appendix on Bessel functions, and new definitions such as antenna effective height. Illustrating the concepts with examples in every chapter, Electromagnetic Waves, Second Edition is an ideal introduction for those new to the field as well as a convenient reference for seasoned professionals.
Category: Technology & Engineering

Electromagnetic Waves In Stratified Media

Author : James R. Wait
ISBN : 9781483184258
Genre : Science
File Size : 22.15 MB
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International Series of Monographs in Electromagnetic Waves, Volume 3: Electromagnetic Waves in Stratified Media provides information pertinent to the electromagnetic waves in media whose properties differ in one particular direction. This book discusses the important feature of the waves that enables communications at global distances. Organized into 13 chapters, this volume begins with an overview of the general analysis for the electromagnetic response of a plane stratified medium comprising of any number of parallel homogeneous layers. This text then explains the reflection of electromagnetic waves from planar stratified media. Other chapters consider the oblique reflection of plane electromagnetic waves from a continuously stratified medium. This book discusses as well the fundamental theory of wave propagation around a sphere. The final chapter deals with the theory of propagation in a spherically stratified medium. This book is a valuable resource for electrical engineers, scientists, and research workers.
Category: Science

Vlsi Circuits For Biomedical Applications

Author : Krzysztof Iniewski
ISBN : 9781596933187
Genre : Biomedical engineering
File Size : 45.94 MB
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Supported with over 280 illustrations and over 160 equations, the book offers cutting-edge guidance on designing integrated circuits for wireless biosensing, body implants, biosensing interfaces, and molecular biology. You discover innovative design techniques and novel materials to help you achieve higher levels circuit and system performance.
Category: Biomedical engineering