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Practical Applications of Asymptotic Techniques in Electromagnetics

Author : Francisco Sáez de Adana

Publisher : Artech House

Page : 231 pages

File Size : 44,9 MB

Release : 2011

Category : Mathematics

ISBN : 1608070646

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Book Description

"Antenna, wireless communication and other electrical engineers use asymptotic techniques for solving electromagnetic problems when the electrical size of a given scenario is large in comparison to the wavelength. This practical book offers in-depth coverage of this area, showing how to apply these techniques to the analysis of complex electromagnetic problems in order to obtain results with an exceptionally high degree of accuracy. Focusing on two highly-effective methods - the uniform theory of diffraction (UTD) and physical optics (PO), this book is unique in that it emphasizes how to solve real-world problems, rather than simply explaining theory like other books on the market. This first-of-its-kind resource show professionals how to apply this knowledge to a wide range of projects in the field, including antenna design, mobile communications, and RCS (radar cross section) computation. This authoritative book is supported with more than 100 illustrations and over 250 equations."



Modern Electromagnetic Scattering Theory with Applications

Author : Andrey V. Osipov

Publisher : John Wiley & Sons

Page : 1482 pages

File Size : 11,12 MB

Release : 2017-01-31

Category : Technology & Engineering

ISBN : 1119293294

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Book Description

This self-contained book gives fundamental knowledge about scattering and diffraction of electromagnetic waves and fills the gap between general electromagnetic theory courses and collections of engineering formulas. The book is a tutorial for advanced students learning the mathematics and physics of electromagnetic scattering and curious to know how engineering concepts and techniques relate to the foundations of electromagnetics



Electromagnetic Radiation, Scattering, and Diffraction

Author : Prabhakar H. Pathak

Publisher : John Wiley & Sons

Page : 1156 pages

File Size : 46,12 MB

Release : 2021-12-07

Category : Science

ISBN : 1119810531

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Book Description

Electromagnetic Radiation, Scattering, and Diffraction Discover a graduate-level text for students specializing in electromagnetic wave radiation, scattering, and diffraction for engineering applications In Electromagnetic Radiation, Scattering and Diffraction, distinguished authors Drs. Prabhakar H. Pathak and Robert J. Burkholder deliver a thorough exploration of the behavior of electromagnetic fields in radiation, scattering, and guided wave environments. The book tackles its subject from first principles and includes coverage of low and high frequencies. It stresses physical interpretations of the electromagnetic wave phenomena along with their underlying mathematics. The authors emphasize fundamental principles and provide numerous examples to illustrate the concepts contained within. Students with a limited undergraduate electromagnetic background will rapidly and systematically advance their understanding of electromagnetic wave theory until they can complete useful and important graduate-level work on electromagnetic wave problems. Electromagnetic Radiation, Scattering and Diffraction also serves as a practical companion for students trying to simulate problems with commercial EM software and trying to better interpret their results. Readers will also benefit from the breadth and depth of topics, such as: Basic equations governing all electromagnetic (EM) phenomena at macroscopic scales are presented systematically. Stationary and relativistic moving boundary conditions are developed. Waves in planar multilayered isotropic and anisotropic media are analyzed. EM theorems are introduced and applied to a variety of useful antenna problems. Modal techniques are presented for analyzing guided wave and periodic structures. Potential theory and Green's function methods are developed to treat interior and exterior EM problems. Asymptotic High Frequency methods are developed for evaluating radiation Integrals to extract ray fields. Edge and surface diffracted ray fields, as well as surface, leaky and lateral wave fields are obtained. A collective ray analysis for finite conformal antenna phased arrays is developed. EM beams are introduced and provide useful basis functions. Integral equations and their numerical solutions via the method of moments are developed. The fast multipole method is presented. Low frequency breakdown is studied. Characteristic modes are discussed. Perfect for graduate students studying electromagnetic theory, Electromagnetic Radiation, Scattering, and Diffraction is an invaluable resource for professional electromagnetic engineers and researchers working in this area.



Electromagnetics for Engineers Volume 1: Electrostatics and Magnetostatics

Author : Dean James Friesen

Publisher : Artech House

Page : 249 pages

File Size : 11,55 MB

Release : 2023-12-31

Category : Science

ISBN : 1685690068

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Book Description

Electromagnetism for Engineers, VOL. I: Electrostatics is a comprehensive introduction to the fundamental principles of electromagnetism, making it an indispensable source for a wide range of readers. This volume covers the essential concepts of electrostatics, including Coulomb's law, electric fields, Gauss's law, and vector mathematics, which forms a foundational tool throughout the book. What sets this book apart are the numerous illustrations and diagrams that visually elucidate complex topics, ensuring a clear and thorough understanding. To reinforce learning, the text includes problem and solution sets, giving readers an opportunity to apply the concepts they have acquired. This book is particularly valuable for college graduates and engineering students who are beginning their journey into the realm of electromagnetism. It is also an excellent reference for practicing engineers seeking to refresh their knowledge of the basic principles of electromagnetism. With a focus on both theory and practical application, this volume provides a strong foundation for readers at various stages of their engineering education and career.



Electromagnetic Diffraction Modeling and Simulation with MATLAB

Author : Gökhan Apaydin

Publisher : Artech House

Page : 364 pages

File Size : 43,49 MB

Release : 2021-02-28

Category : Science

ISBN : 1630817805

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Book Description

This exciting new resource presents a comprehensive introduction to the fundamentals of diffraction of two-dimensional canonical structures, including wedge, strip, and triangular cylinder with different boundary conditions. Maxwell equations are discussed, along with wave equation and scattered, diffracted and fringe fields. Geometric optics, as well as the geometric theory of diffraction are explained. With MATLAB scripts included for several well-known electromagnetic diffraction problems, this book discusses diffraction fundamentals of two-dimensional structures with different boundary conditions and analytical numerical methods that are used to show diffraction. The book introduces fundamental concepts of electromagnetic problems, identities, and definitions for diffraction modeling. Basic coordinate systems, boundary conditions, wave equation, and Green’s function problem are given. The scattered fields, diffracted fields, and fringe fields, radar cross section for diffraction modeling are presented. Behaviors of electromagnetic waves around the two-dimensional canonical wedge and canonical strip are also explored. Diffraction of trilateral cylinders and wedges with rounded edges is investigated as well as double tip diffraction using Finite Difference Time Domain and Method of Moments. A MATLAB based virtual tool, developed with graphical user interface (GUI), for the visualization of both fringe currents and fringe waves is included, using numerical FDTD and MoM algorithm and High-Frequency Asymptotics approaches.



Advanced FDTD Methods

Author : Wenhua Yu

Publisher : Artech House

Page : 267 pages

File Size : 17,87 MB

Release : 2011

Category : Mathematics

ISBN : 1608071774

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Book Description

Advanced FDTD Methods: Parallelization, Acceleration, and Engineering Applications -- Contents -- Preface -- Chapter 1 Computational Electromagnetic Methods -- 1.1 FDTD METHOD -- 1.1.1 FDTD Update Equations -- 1.1.2 Stability Analysis -- 1.1.3 Boundary Conditions -- 1.2 METHOD OF MOMENTS -- 1.3 FINITE ELEMENT METHOD -- 1.3.1 Scalar Formulation -- 1.3.2 Vector Formulation -- 1.4 FINITE INTEGRATION TECHNIQUE -- References -- Chapter 2 FDTD Optimization and Acceleration -- 2.1 INTRODUCTION TO CPU ARCHITECTURE -- 2.2 SSE INSTRUCTION SET -- 2.3 CACHE OPTIMIZATION -- 2.4 TASK PARALLELIZATION AND BUNDLING -- 2.5 PREFETCH -- 2.6 READING OR WRITING COMBINATION -- 2.7 MATERIAL LOOP-UP TABLE -- 2.8 NUMA OPTIMIZATION -- 2.9 IMPLEMENTATION OF VALU FDTD METHOD -- References -- Chapter 3 Parallel FDTD Method and Systems -- 3.1 PARALLEL FDTD METHOD -- 3.2 OPENMP FOR MULTICORE PROCESSORS -- 3.3 MPI TECHNIQUE -- 3.4 NETWORK CARD, SWITCH, AND CABLE -- References -- Chapter 4 Electromagnetic Simulation Techniques -- 4.1 MESH GENERATION TECHNIQUES -- 4.2 BASIC SIMULATION PROCEDURE -- 4.3 DIPOLE ANTENNA -- 4.4 VIVALDI ANTENNA SIMULATION -- 4.5 BANDED MICROWAVE CONNECTOR -- 4.6 PARALLEL LINES -- 4.7 TWO-PORT ANTENNA -- 4.8 SLOT COUPLING -- 4.9 MICROWAVE FILTER -- 4.10 OPTIMIZATION AND PARAMETER SCAN -- 4.11 PERIODIC STRUCTURE SIMULATION -- 4.12 GROUND PENETRATING RADAR MODEL -- 4.13 MICROWAVE CONNECTOR -- References -- Chapter 5 EM Simulation Software Benchmarks -- 5.1 BASIC STEPS IN EM SIMULATION -- 5.1.1 HFSS -- 5.1.2 CST -- 5.1.3 FEKO -- 5.1.4 GEMS -- 5.2 HARDWARE PLATFORMS -- 5.3 PATCH ANTENNA -- 5.4 VIVALDI ANTENNA -- 5.5 SCATTERING OF DIELECTRIC SPHERE -- 5.6 CELL PHONE ANTENNA -- 5.7 ELECTROMAGNETIC BANDGAP STRUCTURE -- 5.8 STANDARD SAR TEST -- 5.9 WAVEGUIDE FILTER -- References -- Chapter 6 Large Multiscale Problem Solving -- 6.1 RADIO FREQUENCY PROTECTION.



Intersystem EMC Analysis, Interference, and Solutions

Author : Uri Vered

Publisher : Artech House

Page : 351 pages

File Size : 43,23 MB

Release : 2018-05-31

Category : Technology & Engineering

ISBN : 1630815632

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Book Description

This comprehensive new resource provides methods and tools for defining EMC requirements and techniques for performing predictions and calculations to achieve electromagnetic compatibility. This book demonstrates how radar, communications, and navigation systems can function without interference. EMC requirements for the device, platform, site, and arena level are discussed and EMC detection analysis is utilized to predict EMC problems. The book explores the interference between receiving and transmitting electronic systems and examines intersystem and intrasystem EMC. Techniques and mathematical framework for performing EMC prediction and calculations to solve electromagnetic compatibility problems are highlighted. Moreover, this book presents classic methods and several original EMC calculation procedures including new approaches in mathematical development of interference probability calculations. Readers learn how to anticipate problems and then define EMC solutions.



Selected Asymptotic Methods with Applications to Electromagnetics and Antennas

Author : George Fikioris

Publisher : Springer Nature

Page : 187 pages

File Size : 17,76 MB

Release : 2022-06-01

Category : Technology & Engineering

ISBN : 3031017161

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Book Description

This book describes and illustrates the application of several asymptotic methods that have proved useful in the authors' research in electromagnetics and antennas. We first define asymptotic approximations and expansions and explain these concepts in detail. We then develop certain prerequisites from complex analysis such as power series, multivalued functions (including the concepts of branch points and branch cuts), and the all-important gamma function. Of particular importance is the idea of analytic continuation (of functions of a single complex variable); our discussions here include some recent, direct applications to antennas and computational electromagnetics. Then, specific methods are discussed. These include integration by parts and the Riemann-Lebesgue lemma, the use of contour integration in conjunction with other methods, techniques related to Laplace's method and Watson's lemma, the asymptotic behavior of certain Fourier sine and cosine transforms, and the Poisson summation formula (including its version for finite sums). Often underutilized in the literature are asymptotic techniques based on the Mellin transform; our treatment of this subject complements the techniques presented in our recent Synthesis Lecture on the exact (not asymptotic) evaluation of integrals.



Analyzing the Physics of Radio Telescopes and Radio Astronomy

Author : Yeap, Kim Ho

Publisher : IGI Global

Page : 324 pages

File Size : 14,71 MB

Release : 2020-02-07

Category : Science

ISBN : 1799823830

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Book Description

In the field of astrophysics, modern developments of practice are emerging in order to further understand the spectral information derived from cosmic sources. Radio telescopes are a current mode of practice used to observe these occurrences. Despite the various accommodations that this technology offers, physicists around the globe need a better understanding of the underlying physics and operational components of radio telescopes as well as an explanation of the cosmic objects that are being detected. Analyzing the Physics of Radio Telescopes and Radio Astronomy is an essential reference source that discusses the principles of the astronomical instruments involved in the construction of radio telescopes and the analysis of cosmic sources and celestial objects detected by this machinery. Featuring research on topics such as electromagnetic theory, antenna design, and geometrical optics, this book is ideally designed for astrophysicists, engineers, researchers, astronomers, students, and educators seeking coverage on the operational methods of radio telescopes and understanding the physical processes of radio astronomy.



Applications of Geographic Information Systems for Wireless Network Planning

Author : Francisco Saez de Adana

Publisher : Artech House

Page : 153 pages

File Size : 39,6 MB

Release : 2020-09-30

Category : Technology & Engineering

ISBN : 1630817643

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Book Description

This practical book shows the procedure to integrate, in a practical way, empirical propagation methods with geographical information systems (GIS) to obtain the radio coverage in open environments. It includes the theoretical explanation of empirical methods and GIS but as a basis to develop a real tool that combines both aspects to provide the user a suitable method for the wireless network planning in urban areas. The book introduces the empirical propagation methods and their application to wireless network planning. The motivation for combining them with the information obtained from geographical information systems is illustrated as well as their application to real situations. The most important empirical methods used to calculate the propagation in open environments are reviewed. Focus is given to the geometrical information needed to prove the necessity of obtaining some geographical information if these methods must be applied to realistic network planning. A review of the most important GIS is also described. The advantages and disadvantages of every system is analyzed from the point of view of its integration with an empirical propagation method. An application that combines a geographical information system with an empirical propagation method is fully described. The practical features of this integration are completely studied to allow an engineer to use and develop his own tool. Examples are given in each chapter to fully describe and illustrate the process.