Method Of Edge Waves In The Physical Theory Of Diffraction
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| Author | : Pyotr Ya. Ufimtsev |
| Publisher | : John Wiley & Sons |
| Total Pages | : 349 |
| Release | : 2007-02-09 |
| Genre | : Science |
| ISBN | : 0470109009 |
This book is the first complete and comprehensive description of the modern Physical Theory of Diffraction (PTD) based on the concept of elementary edge waves (EEWs). The theory is demonstrated with the example of the diffraction of acoustic and electromagnetic waves at perfectly reflecting objects. The derived analytic expressions clearly explain the physical structure of the scattered field and describe in detail all of the reflected and diffracted rays and beams, as well as the fields in the vicinity of caustics and foci. Shadow radiation, a new fundamental component of the field, is introduced and proven to contain half of the total scattered power.
| Author | : Vladimir Andreevich Borovikov |
| Publisher | : IET |
| Total Pages | : 408 |
| Release | : 1994 |
| Genre | : Mathematics |
| ISBN | : 9780852968307 |
This book details the ideas underlying geometrical theory of diffraction (GTD) along with its relationships with other EM theories.
| Author | : Pyotr Ya. Ufimtsev |
| Publisher | : John Wiley & Sons |
| Total Pages | : 496 |
| Release | : 2014-04-24 |
| Genre | : Science |
| ISBN | : 1118848691 |
The book is a complete, comprehensive description of the modern Physical Theory of Diffraction (PTD) based upon the concept of elementary edge waves. The theory is demonstrated with examples of the diffraction of acoustic and electromagnetic waves at perfectly reflecting objects. Readers develop the skills to apply PTD to solve various scattering problems. The derived analytic expressions clearly illustrate the physical structure of the scattered field. They additionally describe all of the reflected and diffracted rays and beams, as well as the fields in the vicinity of caustics and foci. Shadow radiation, a fundamental component of PTD, is introduced and proven to contain half the total scattered power. The equivalence relationships between acoustic and electromagnetic diffracted waves are established and emphasized. Throughout the book, the author enables readers to master both the theory and its practical applications. Plotted numeric results supplement the theory and facilitate the visualization of individual contributions of distinct parts of the scattering objects to the total diffracted field Detailed comments help readers understand and implement all the critical steps of the analytic and numeric calculations Problem sets in each chapter give readers an opportunity to analyse and investigate the diffraction phenomena
| Author | : Pyotr Yakovlevich Ufimtsev |
| Publisher | : IET |
| Total Pages | : 452 |
| Release | : 2009-06-30 |
| Genre | : Science |
| ISBN | : 1891121669 |
"This book includes in revised form materials from certain articles by the author and Chapters 1, 4, 6, and 7 of his book on PTD [Metod kraevykh voln v fizicheskoi? teorii difrakt?s?ii]"--Page xv. Revision of title published: Encino, Calif. : Tech Science Press, 2003, in series: Contemporary research on emerging sciences and technology. Supplements Fundamental of the physical theory of diffraction (Wiley, 2007)--P. 4 of cover.
| Author | : Kamill Davydovich Klem-Musatov |
| Publisher | : SEG Books |
| Total Pages | : 431 |
| Release | : 1994 |
| Genre | : Diffraction |
| ISBN | : 1560800747 |
Presents a complete mathematical description of diffractions caused by seismic velocity discontinuities. Diffraction theory provides important physical insights into seismology and is a necessary part of describing the nature of a seismogram. The author describes elastic wave theory and relates it to the high-frequency approximations of ray theory.
| Author | : Jian-Ming Jin |
| Publisher | : John Wiley & Sons |
| Total Pages | : 744 |
| Release | : 2015-08-10 |
| Genre | : Science |
| ISBN | : 111910808X |
Reviews the fundamental concepts behind the theory and computation of electromagnetic fields The book is divided in two parts. The first part covers both fundamental theories (such as vector analysis, Maxwell’s equations, boundary condition, and transmission line theory) and advanced topics (such as wave transformation, addition theorems, and fields in layered media) in order to benefit students at all levels. The second part of the book covers the major computational methods for numerical analysis of electromagnetic fields for engineering applications. These methods include the three fundamental approaches for numerical analysis of electromagnetic fields: the finite difference method (the finite difference time-domain method in particular), the finite element method, and the integral equation-based moment method. The second part also examines fast algorithms for solving integral equations and hybrid techniques that combine different numerical methods to seek more efficient solutions of complicated electromagnetic problems. Theory and Computation of Electromagnetic Fields, Second Edition: Provides the foundation necessary for graduate students to learn and understand more advanced topics Discusses electromagnetic analysis in rectangular, cylindrical and spherical coordinates Covers computational electromagnetics in both frequency and time domains Includes new and updated homework problems and examples Theory and Computation of Electromagnetic Fields, Second Edition is written for advanced undergraduate and graduate level electrical engineering students. This book can also be used as a reference for professional engineers interested in learning about analysis and computation skills.
| Author | : Reinaldo Perez |
| Publisher | : Academic Press |
| Total Pages | : 451 |
| Release | : 1998-10-17 |
| Genre | : Technology & Engineering |
| ISBN | : 0080543847 |
The need for controlling interference and limiting noise problems in wireless communications systems starts at the most fundamental levels of circuit design. When efficient approaches for noise control are implemented at the circuit level, it helps significantly to ensure the effective noise control for the overall system design. This book is a practical reference for engineers who are particularly interested in practical case studies covering how to avoid undesired interference and noise problems in their designs. It covers a significant number of chapters dedicated to different aspects of digital, analog, and mixed mode analog/digital design which are directly affected by noise and interference issues. Each of the three Wireless Communications Design Handbook volumes addresses theory and immediate applications. The approach followed is strictly hardware-oriented. The material presented provides a good, practical, and theoretical background of noise sources and their analysis, as well as methodologies for minimizing interference problems in electronic design. - An applications-oriented reference for engineers, system designers, and practitioners - Includes computational techniques for simulation - Addresses the most common interference concerns in wireless communications circuit designs - Presents a hardware-oriented approach for addressing analog, digital, and mixed-made interference concerns with a focus on design - Addresses noise sources, interference models, and design solutions simultaneously - Combines analytical and computer modeling for interference analysis - Addresses interference concerns from the IC level to the subsystem level
| Author | : Peter J. Westwick |
| Publisher | : |
| Total Pages | : 270 |
| Release | : 2020 |
| Genre | : Business & Economics |
| ISBN | : 0190677449 |
The story behind the technology that revolutionized both aeronautics, and the course of history On a moonless night in January 1991, a dozen airplanes appeared in the skies over Baghdad. Or, rather, didn't appear. They arrived in the dark, their black outlines cloaking them from sight. More importantly, their odd, angular shapes, which made them look like flying origami, rendered them undetectable to Iraq's formidable air defenses. Stealth technology, developed during the decades before Desert Storm, had arrived. To American planners and strategists at the outset of the Cold War, this seemingly ultimate way to gain ascendance over the USSR was only a question. What if the United States could defend its airspace while at the same time send a plane through Soviet skies undetected? A craft with such capacity would have to be essentially invisible to radar - an apparently miraculous feat of physics and engineering. In Stealth, Peter Westwick unveils the process by which the impossible was achieved. At heart, Stealth is a tale of two aerospace companies, Lockheed and Northrop, and their fierce competition - with each other and with themselves - to obtain what was estimated one of the largest procurement contracts in history. Westwick's book fully explores the individual and collective ingenuity and determination required to make these planes and in the process provides a fresh view of the period leading up to the end of the Soviet Union. Taking into account the role of technology, as well as the art and science of physics and engineering, Westwick offers an engaging narrative, one that immerses readers in the race to produce a weapon that some thought might save the world, and which certainly changed it.
| Author | : Lal Chand Godara |
| Publisher | : CRC Press |
| Total Pages | : 1043 |
| Release | : 2018-10-03 |
| Genre | : Technology & Engineering |
| ISBN | : 1351835920 |
The move toward worldwide wireless communications continues at a remarkable pace, and the antenna element of the technology is crucial to its success. With contributions from more than 30 international experts, the Handbook of Antennas in Wireless Communications brings together all of the latest research and results to provide engineering professionals and students with a one-stop reference on the theory, technologies, and applications for indoor, hand-held, mobile, and satellite systems. Beginning with an introduction to wireless communications systems, it offers an in-depth treatment of propagation prediction and fading channels. It then explores antenna technology with discussion of antenna design methods and the various antennas in current use or development for base stations, hand held devices, satellite communications, and shaping beams. The discussions then move to smart antennas and phased array technology, including details on array theory and beamforming techniques. Space diversity, direction-of-arrival estimation, source tracking, and blind source separation methods are addressed, as are the implementation of smart antennas and the results of field trials of systems using smart antennas implemented. Finally, the hot media topic of the safety of mobile phones receives due attention, including details of how the human body interacts with the electromagnetic fields of these devices. Its logical development and extensive range of diagrams, figures, and photographs make this handbook easy to follow and provide a clear understanding of design techniques and the performance of finished products. Its unique, comprehensive coverage written by top experts in their fields promises to make the Handbook of Antennas in Wireless Communications the standard reference for the field.
| Author | : Levent Sevgi |
| Publisher | : John Wiley & Sons |
| Total Pages | : 665 |
| Release | : 2014-03-13 |
| Genre | : Science |
| ISBN | : 111887711X |
This unique book presents simple, easy-to-use, but effective short codes as well as virtual tools that can be used by electrical, electronic, communication, and computer engineers in a broad range of electrical engineering problems Electromagnetic modeling is essential to the design and modeling of antenna, radar, satellite, medical imaging, and other applications. In this book, author Levent Sevgi explains techniques for solving real-time complex physical problems using MATLAB-based short scripts and comprehensive virtual tools. Unique in coverage and tutorial approach, Electromagnetic Modeling and Simulation covers fundamental analytical and numerical models that are widely used in teaching, research, and engineering designs—including mode and ray summation approaches with the canonical 2D nonpenetrable parallel plate waveguide as well as FDTD, MoM, and SSPE scripts. The book also establishes an intelligent balance among the essentials of EM MODSIM: The Problem (the physics), The Theory and Models (mathematical background and analytical solutions), and The Simulations (code developing plus validation, verification, and calibration). Classroom tested in graduate-level and short courses, Electromagnetic Modeling and Simulation: Clarifies concepts through numerous worked problems and quizzes provided throughout the book Features valuable MATLAB-based, user-friendly, effective engineering and research virtual design tools Includes sample scenarios and video clips recorded during characteristic simulations that visually impact learning—available on wiley.com Provides readers with their first steps in EM MODSIM as well as tools for medium and high-level code developers and users Electromagnetic Modeling and Simulation thoroughly covers the physics, mathematical background, analytical solutions, and code development of electromagnetic modeling, making it an ideal resource for electrical engineers and researchers.
