Plane Wave Theory of Time Domain Fields

"This invaluable book provides a comprehensive framework for the formulation and solution ofnumerous problems involving the radiation, reception, propagation, and scattering of electromagnetic and acoustic waves.

Author: Thorkild B. Hansen

Publisher: John Wiley & Sons

ISBN: 9780780334281

Category: Science

Page: 400

View: 106

DOWNLOAD →

"This invaluable book provides a comprehensive framework for the formulation and solution ofnumerous problems involving the radiation, reception, propagation, and scattering of electromagnetic and acoustic waves. Filled with original derivations and theorems, it includes the first rigorous development of plane-wave expansions for time-domain electromagnetic and acoustic fields. For the past 35 years, near-field measurement techniques have been confined to the frequency domain. Now, with the publication of this book, probe-corrected near-field measurement techniques have been extended to ultra-wide-band, short-pulse transmitting and receiving antennas and transducers. By combining unencumbered straightforward derivations with in-depth expositions of prerequisite material, the authors have created an invaluable resource for research scientists and engineers in electromagnetics and acoustics, and a definitive reference on plane-wave expansions and near-field measurements. Featured topics include: * An introduction to the basic electromagnetic and acoustic field equations * A rigorous development of time-domain and frequency-domain plane-wave representations * The formulation of time-domain, frequency-domain, and static planar near-field measurement techniques with and without probe-correction * Sampling theorems and computation schemes for time-domain and frequency-domain fields * Analytic-signal formulas that simplify the formulation and analysis of transient fields * Wave phenomena, such as ``electromagnetic missiles"" encountered only in the time domain * Definitive force and power relations for electromagnetic and acoustic fields and sources." Sponsored by: IEEE Antennas and Propagation Society.

Time Domain Electromagnetics

[106] D. G. Dudley and D. M. Goodman, “Transient Identification and Object Classification,” in Time Domain Measurements in Electromagnetics, E. K. Miller, ...

Author: Sadasiva M. Rao

Publisher: Elsevier

ISBN: 0080519245

Category: Science

Page: 372

View: 871

DOWNLOAD →

Time Domain Electromagnetics deals with a specific technique in electromagnetics within the general area of electrical engineering. This mathematical method has become a standard for a wide variety of applications for design and problem solving. This method of analysis in electromagnetics is directly related to advances in cellular and mobile communications technology, as well as traditional EM areas such as radar, antennas, and wave propagation. Most of the material is available in the research journals which is difficult for a non-specialist to locate, read, understand, and effectively use for the problem at hand. Only book currently available to practicing engineers and research scientists exclusively devoted to this subject Includes contributions by the world's leading experts in electromagnetics Presents the most popular methods used in time domain analysis are included at one place with thorough discussion of the methods in an easily understandable style In each chapter, many simple and practical examples are discussed thoroughly to illustrate the salient points of the material presented All chapters are written in a consistent style that allows the book to be of use for self-study by professionals as well as for use in a graduate-level course in electrical engineering

The Finite Difference Time Domain Method for Electromagnetics

This volume offers timeless applications and formulations you can use to treat virtually any material type and geometry.

Author: Karl S. Kunz

Publisher: CRC Press

ISBN: 0849386578

Category: Technology & Engineering

Page: 464

View: 315

DOWNLOAD →

The Finite-Difference Time-domain (FDTD) method allows you to compute electromagnetic interaction for complex problem geometries with ease. The simplicity of the approach coupled with its far-reaching usefulness, create the powerful, popular method presented in The Finite Difference Time Domain Method for Electromagnetics. This volume offers timeless applications and formulations you can use to treat virtually any material type and geometry. The Finite Difference Time Domain Method for Electromagnetics explores the mathematical foundations of FDTD, including stability, outer radiation boundary conditions, and different coordinate systems. It covers derivations of FDTD for use with PEC, metal, lossy dielectrics, gyrotropic materials, and anisotropic materials. A number of applications are completely worked out with numerous figures to illustrate the results. It also includes a printed FORTRAN 77 version of the code that implements the technique in three dimensions for lossy dielectric materials. There are many methods for analyzing electromagnetic interactions for problem geometries. With The Finite Difference Time Domain Method for Electromagnetics, you will learn the simplest, most useful of these methods, from the basics through to the practical applications.

The Finite Difference Time Domain Method for Electromagnetics

An indoor facility (only later surrounded by an electromagnetic absorber), it allowed measurements with a clear time of ~ 20 ns.

Author: Karl S. Kunz

Publisher: CRC Press

ISBN: 9781351410489

Category: Science

Page: 464

View: 550

DOWNLOAD →

The Finite-Difference Time-domain (FDTD) method allows you to compute electromagnetic interaction for complex problem geometries with ease. The simplicity of the approach coupled with its far-reaching usefulness, create the powerful, popular method presented in The Finite Difference Time Domain Method for Electromagnetics. This volume offers timeless applications and formulations you can use to treat virtually any material type and geometry. The Finite Difference Time Domain Method for Electromagnetics explores the mathematical foundations of FDTD, including stability, outer radiation boundary conditions, and different coordinate systems. It covers derivations of FDTD for use with PEC, metal, lossy dielectrics, gyrotropic materials, and anisotropic materials. A number of applications are completely worked out with numerous figures to illustrate the results. It also includes a printed FORTRAN 77 version of the code that implements the technique in three dimensions for lossy dielectric materials. There are many methods for analyzing electromagnetic interactions for problem geometries. With The Finite Difference Time Domain Method for Electromagnetics, you will learn the simplest, most useful of these methods, from the basics through to the practical applications.

Some Basic Considerations Concerning Time Domain Measurements with Electromagnetic Field Sensors Enkele Aspecten Aangaande Tijddomein Metingen Met Elektromagnetische Veldsensoren

Finally, time-domain calibration of electromagnetic field sensors is addressed. Especially the influence of the bandwidth of the measuring system is investigated. It is found that the influence of the bandwidth can be compensated.

Author: J. J. Klaasen

Publisher:

ISBN: OCLC:227766987

Category:

Page: 27

View: 383

DOWNLOAD →

This report presents some ideas concerning time-domain measurements with electromagnetic-field sensors, and how the time-domain measurements can be performed. A very simple method is enunciated to correct the influence of the low cut-off frequency of the sensor. It is shown that the low cut-off frequency of the sensor can be found from its time-domain response to a NEMP. The practical value of this method is demonstrated by experiments. Finally, time-domain calibration of electromagnetic field sensors is addressed. Especially the influence of the bandwidth of the measuring system is investigated. It is found that the influence of the bandwidth can be compensated.

Time Domain Methods in Electrodynamics

Traditionally measurements of electromagnetic interference are performed in frequency domain. Seventy years ago radio noise meters have become available [1] ...

Author: Peter Russer

Publisher: Springer Science & Business Media

ISBN: 9783540687689

Category: Technology & Engineering

Page: 417

View: 294

DOWNLOAD →

This book consists of contributions given in honor of Wolfgang J.R. Hoefer. Space and time discretizing time domain methods for electromagnetic full-wave simulation have emerged as key numerical methods in computational electromagnetics. Time domain methods are versatile and can be applied to the solution of a wide range of electromagnetic field problems. Computing the response of an electromagnetic structure to an impulsive excitation localized in space and time provides a comprehensive characterization of the electromagnetic properties of the structure in a wide frequency range. The most important methods are the Finite Difference Time Domain (FDTD) and the Transmission Line Matrix (TLM) methods. The contributions represent the state of the art in dealing with time domain methods in modern engineering electrodynamics for electromagnetic modeling in general, the Transmission Line Matrix (TLM) method, the application of network concepts to electromagnetic field modeling, circuit and system applications and, finally, with broadband devices, systems and measurement techniques.

The Development of a Bistatic Electromagnetic Scattering Laboratory Employing Time Domain Measurement Techniques for Impulse Response Determination and Target Classification

A time domain measurements, electromagnetic scattering laboratory has been developed to provide a means of experimentally measuring the transient, scattered electromagnetic fields from symmetric objects for impulse response determination or ...

Author: Charles W Hammond (Jr)

Publisher:

ISBN: OCLC:227484378

Category:

Page: 111

View: 165

DOWNLOAD →

A time domain measurements, electromagnetic scattering laboratory has been developed to provide a means of experimentally measuring the transient, scattered electromagnetic fields from symmetric objects for impulse response determination or target classification. The evolution of the physical laboratory is described in terms of the development of the transmitting and receiving antennas, the interface of the data processing hardware, the signal processing scheme, the software routine functions, and the fabrication of scattering range targets. The smoothed impulse response of a thin wire scatterer is experimentally determined, and a comparison of these measurements is made to a theoretical calculation of the response. (Author).

Ultra wideband Short pulse Electromagnetics

Combining this issue with the mature nature of the technology involved in frequency - domain measurements , it would appear that at this time the quality of ...

Author: Henry L. Bertoni

Publisher: Plenum Publishing Corporation

ISBN: UCSD:31822038664058

Category: Science

Page: 542

View: 202

DOWNLOAD →

Pulse Generation and Detection: Terahertz Radiation from ElectroOptic Crystals (X.C. Zhang et al.). Photoconductive Semiconductor Switches for High Power Radiation (G.M. Loubriel). Broadband Electronic Systems and Components: Pulse Generation and Compression on a TravellingWave MMIC Schottky Diode Array (M. Dragoman et al.). Precursor of an UltraWideband Radar System (A.S. Podgorski). Antennas and Arrays: Impulse Radiating Antennas (C.E. Baum, E.G. Farr). WideBandwidth Radiation from Arrays of Endfire Tapered Slot Antennas (D.H. Schaubert). Pulse Propagation and Guidance: Ultrashort P.

Handbook of Engineering Electromagnetics

Courtney, C.C. Time-Domain measurement of the electromagnetic properties of materials. IEEE Trans. Microwave Theory Tech. May 1998, MTT-46(5), 517–522.

Author: Rajeev Bansal

Publisher: CRC Press

ISBN: 0203026020

Category: Science

Page: 720

View: 470

DOWNLOAD →

Engineers do not have the time to wade through rigorously theoretical books when trying to solve a problem. Beginners lack the expertise required to understand highly specialized treatments of individual topics. This is especially problematic for a field as broad as electromagnetics, which propagates into many diverse engineering fields. The time h

Electromagnetic Bandgap EBG Structures

4.7.2.3 Time Domain Measurements and Characterization In order to complete the overall experimental description of the onboard EBGbased CM filters, ...

Author: Antonio Orlandi

Publisher: John Wiley & Sons

ISBN: 9781119281535

Category: Technology & Engineering

Page: 240

View: 310

DOWNLOAD →

An essential guide to the background, design, and application of common-mode filtering structures in modern high-speed differential communication links Written by a team of experts in the field, Electromagnetic Bandgap (EBG) Structures explores the practical electromagnetic bandgap based common mode filters for power integrity applications and covers the theoretical and practical design approaches for common mode filtering in high-speed printed circuit boards, especially for boards in high data-rate systems. The authors describe the classic applications of electromagnetic bandgap (EBG) structures and the phenomena of common mode generation in high speed digital boards. The text also explores the fundamental electromagnetic mechanisms of the functioning of planar EBGs and considers the impact of planar EBGs on the digital signal propagation of single ended and differential interconnects routed on top or between EBGs. The authors examine the concept, design, and modeling of EBG common mode filters in their two forms: on-board and removable. They also provide several comparisons between measurement and electromagnetic simulations that validate the proposed EBG filters' design approach. This important resource: • Presents information on planar EBG based common mode filters for high speed differential digital systems • Provides systematic analysis of the fundamental mechanisms of planar EBG structures • Offers detailed design methodology to create EBG filters without the need for repeated full-wave electromagnetic analysis • Demonstrates techniques for use in practical real-world designs Electromagnetic Bandgap (EBG) Structures: Common Mode Filters for High Speed Digital Systems offers an introduction to the background, design, and application of common-mode filtering structures in modern high-speed differential communication links, a critical issue in high-speed and high-performance systems.

Calibration Methods for Reproducible and Comparable Electromagnetic Partial Discharge Measurements in Power Transformers

differences between available UHF measurement instruments is the acquisition in frequency domain using a narrow-band input or in time domain mostly using a ...

Author: Martin Siegel

Publisher: BoD – Books on Demand

ISBN: 9783752618761

Category: Technology & Engineering

Page: 128

View: 629

DOWNLOAD →

The reliability of electrical energy networks depends on the quality and availability of their electrical equipment, e.g., power transformers. Local failures inside their insulation can lead to breakdowns resulting in high outage and penalty costs. To prevent these destructive events, power transformers are tested for partial discharge (PD) activity in a routine test before shipment. Furthermore, PD activity can be evaluated as a diagnostic measurement on-site (on-line or off-line) or be constantly monitored during service using the ultra-high frequency (UHF) method. In this thesis, a calibration procedure is proposed for the UHF method used in power transformers, which is lacking so far. The calibration process is required to ensure both reproducibility and comparability of UHF measurements. Only a calibrated UHF measurement procedure can be deemed reliable and eventually be introduced to supplement in (site-)acceptance tests of power transformers. The proposed calibration method considers two factors: The influence of the UHF sensors' sensitivity and that of the UHF instrument characteristics, including accessories like cables, pre-amplifier, etc. The UHF instruments' influence is corrected by using a defined and invariable test signal as a reference for all recording devices comparable to the calibration method used in IEC 60270 for electrical PD measurement. The sensitivity of the UHF sensor is addressed by a characterization of UHF sensors using the antenna factor (AF) measured in a special reproducible setup, i.e., a GTEM cell. In this thesis, a self-built GTEM cell is presented, which is oil-filled to address the environmental conditions inside a transformer where the sensor will be used. With such a cell, influences on the AF of UHF sensors are investigated, and it is shown that sensor sensitivities measured in an air-filled cell can be corrected to the oil environment. A practical evaluation of the proposed calibration procedure is performed in a laboratory setup on a distribution transformer with different UHF instruments and sensors using artificial PD signals and real high voltage driven PD sources. Finally, this thesis identifies future research topics, which may be needed to improve the proposed UHF calibration procedure for power transformers and the UHF method in general.

Cable Shielding for Electromagnetic Compatibility

Also, when testing in both time and frequency domains, it is necessary to make measurements on a sample of short electrical length (although, in time domain ...

Author: Anatoly Tsaliovich

Publisher: Springer Science & Business Media

ISBN: 9781461565918

Category: Technology & Engineering

Page: 470

View: 290

DOWNLOAD →

The mathematical theory of wave propagation along a conductor with an external coaxial return is very old, going back to the work of Rayleigh, Heaviside, and J. J. Thomson. These words were written by S. A. Schelkunoff back in 1934. Indeed, those early works dealt with signal propagation along the line as well as electromagnetic shielding of the environment inside and/or outside the metallic enclosures. Max well himself developed pioneering studies of single-layer shielding shells, while a paper with such a "modern" title as "On the Magnetic Shielding of Concentric Spherical Shells" was presented by A. W Rucker as early as 1893! * Such "state of the art" shielding theory created in the last century is even more amazing if you think that at almost the same time (namely, in 1860s), a manuscript of Jules Verne's book, Paris in the. xx Century, was rejected by a publisher because it pre dicted such "outrageously incredible" electrotechnology as, for example, FAX service by wires and the electrocutioner's chair. (With regard to the last invention, I suspect many readers would rather Jules Verne has been wrong. ) However, although the beginning of electromagnetic shielding theory and its implementation to electronic cables date back more than a century, this dynamic field keeps constantly growing, driven by practical applications.

High Frequency Electromagnetic Dosimetry

Although electromagnetic safety standards require field measurements, ... to use time domain measurements for characterizing electromagnetic emissions [17]; ...

Author: David A. Sánchez-Hernández

Publisher: Artech House

ISBN: 9781596933972

Category: Science

Page: 260

View: 317

DOWNLOAD →

Along with the growth of RF and microwave technology applications, there is a mounting concern about the possible adverse effects over human health from electromagnetic radiation. Addressing this issue and putting it into perspective, this groundbreaking resource provides critical details on the latest advances in high frequency electromagnetic dosimetry. The book takes a scientific and rigorous engineering point of view, helping you achieve highly accurate exposure assessments.

Review of Progress in Quantitative Nondestructive Evaluation

J. A. Landt, “Typical time domain measurement configurations,” in Time Domain Measurements in Electromagnetics (E. K. Miller, ed.), New York: Van Nostrand ...

Author: Donald O. Thompson

Publisher: Springer Science & Business Media

ISBN: 9781461519874

Category: Technology & Engineering

Page: 1208

View: 132

DOWNLOAD →

These Proceedings, consisting of Parts A and B, contain the edited versions of most of the papers presented at the annual Review of Progress in Quantitative Nondestructive Evaluation held at Snowmass Village, Colorado, on July 31 to August 4, 1994. The Review was organized by the Center for NDE at Iowa State University, in cooperation with the Ames Laboratory of the US DOE, the Materials Directorate of the Wright Laboratory, Wright-Patterson Air Force Base, the American Society of Nondestructive Testing, the Department of Energy, the National Institute of Standards and Technology, the Federal Aviation Administration, the National Science Foundation Industry/University Cooperative Research Centers, and the Working Group in Quantitative NDE. This year's Review of Progress in QNDE was attended by approximately 450 participants from the U.S. and many foreign countries who presented over 360 papers. The meeting was divided into 36 sessions, with as many as four sessions running concurrently. The Review covered all phases of NDE research and development from fundamental investigations to engineering applications or inspection systems, and it included many important methods of inspection science from acoustics to x-rays. In the last eight to ten years, the Review has stabilized at about its current size, which most participants seem to agree is large enough to permit a full-scale overview of the latest developments, but still small enough to retain the collegial atmosphere which has marked the Review since its inception.

Handbook of Electromagnetic Compatibility

Time-domain sensors and radiators. In “Time Domain Measurements in Electromagnetics” (E. K. Miller, ed.), p. 122–174. Van Nostrand-Reinhold, New York.

Author: Reinaldo Perez

Publisher: Academic Press

ISBN: 9781483288970

Category: Technology & Engineering

Page: 1098

View: 132

DOWNLOAD →

This"know-how"book gives readers a concise understanding of the fundamentals of EMC, from basic mathematical and physical concepts through present, computer-age methods used in analysis, design, and tests. With contributions from leading experts in their fields, the text provides a comprehensive overview. Fortified with information on how to solve potential electromagnetic interference (EMI) problems that may arise in electronic design, practitioners will be betterable to grasp the latest techniques, trends, and applications of this increasingly important engineering discipline. Handbook of Electromagnetic Compatibility contains extensive treatment of EMC applications to radio and wireless communications, fiber optics communications, and plasma effects. Coverage of EMC-related issues includes lightning, electromagnetic pulse, biological effects, and electrostatic discharge. Practical examples are used to illustrate the material, and all information is presented in an accessible and organized format. The text is intended primarily for those practicing engineers who need agood foundation in EMC, but it will also interest faculty and students, since a good portion of the material covered can find use in the classroom or as a springboard for further research. The chapters are written by experts in the field Details the fundamental principles, then moves to more advanced topics Covers computational electromagnetics applied to EMC problems Presents an extensive treatment of EMC applications to: Radio and wireless communications, Fiber optic communications, Plasma effects, Wired circuits, Microchips, Includes practical examples, Fiber optic, Communications, Plasma effects, Wired circuits, Microchips, Includes practical examples

Ultra Wideband Short Pulse Electromagnetics

One can therefore perform a scattering measurement in the time or frequency domain and, as long as the time and frequency domain measurements cover the same ...

Author: H.L. Bertoni

Publisher: Springer Science & Business Media

ISBN: 9781461528708

Category: Science

Page: 542

View: 276

DOWNLOAD →

In 1945, Dr. Ernst Weber founded, and was the first Director of, the Microwave Research Institute (MRI) at POLYTECHNIC UNIVERSITY (at that time named the Polytechnic Institute of Brooklyn). MRI gained world-wide recognition in the 50's and 60's for its research in electromagnetic theory, antennas and radiation, network theory and microwave networks, microwave components and devices. It was also known through its series of topical symposia and the widely distributed hard bound MRI Symposium Proceedings. Rededicated as the Weber Research Institute (WRI) in 1986, the research focus today is on such areas as electromagnetic propagation and antennas, ultra broadband electromagnetics, pulse power, acoustics, gaseous electronics, plasma physics, solid state materials, quantum electronics, electromagnetic launchers, and networks. Following the MRI tradition, WRI has launched its own series of in-depth topical conferences with published proceedings. The first conference was held in October, 1990 and was entitled Directions in Electromagnetic Wave Modeling. The proceedings of the conference were published under that title by Plenum Press. This volume constitutes the Proceedings of the second WRI International Conference dealing with Ultra·Wideband Short·Pulse Electromagnetics.

Time Domain Ultra Wideband Radar Sensor and Components

Miller, E.K.: Time-Domain Measurements in Electromagnetics. Van Nostrand Reinhold, NewYork (1986) 3. Nicolson, A.M.: Subnanosecond risetime pulse generators ...

Author: Cam Nguyen

Publisher: Springer Science & Business Media

ISBN: 9781461495789

Category: Technology & Engineering

Page: 133

View: 491

DOWNLOAD →

This book presents the theory, analysis, and design of ultra-wideband (UWB) radar and sensor systems (in short, UWB systems) and their components. UWB systems find numerous applications in the military, security, civilian, commercial and medicine fields. This book addresses five main topics of UWB systems: System Analysis, Transmitter Design, Receiver Design, Antenna Design and System Integration and Test. The developments of a practical UWB system and its components using microwave integrated circuits, as well as various measurements, are included in detail to demonstrate the theory, analysis and design technique. Essentially, this book will enable the reader to design their own UWB systems and components. In the System Analysis chapter, the UWB principle of operation as well as the power budget analysis and range resolution analysis are presented. In the UWB Transmitter Design chapter, the design, fabrication and measurement of impulse and monocycle pulse generators are covered. The UWB Receiver Design chapter addresses the design and measurement of the strobe pulse generator, sampling mixer, low-noise amplifier and synchronous sampling receiver. Next, the UWB Antenna Design chapter details the design and measurement of to two UWB antennas: the microstrip quasi-horn antenna and the UWB uniplanar antenna. The System Integration and Test chapter covers the transmission-reception test, signal processing, system integration, and evaluation of the UWB sensor. The final chapter provides a summary and conclusion of the work.

Ultra Wideband Short Pulse Electromagnetics 2

ULTRA-WIDEBAND TIME-DOMAIN MEASUREMENTS All of the time-domain techniques used to study high-frequency transmission lines attempt to launch and measure ...

Author: L. Carin

Publisher: Springer Science & Business Media

ISBN: 9781489913944

Category: Science

Page: 606

View: 262

DOWNLOAD →

The papers published in this volume were presented at the Second International Conference on Ultra-WidebandiShort-Pulse (UWB/SP) Electromagnetics, ApriIS-7, 1994. To place this second international conference in proper perspective with respect to the first conference held during October 8-10, 1992, at Polytechnic University, some background information is necessary. As we had hoped, the first conference struck a responsive cord, both in timeliness and relevance, among the electromagnetic community 1. Participants at the first conference already inquired whether and when a follow-up meeting was under consideration. The first concrete proposal in this direction was made a few months after the first conference by Prof. A. Terzuoli of the Air Force Institute of Technology (AFIT), Dayton, Ohio, who has been a strong advocate of time-domain methods and technologies. He initially proposed a follow-up time-domain workshop under AFIT auspices. Realizing that interest in this subject is lodged also at other Air Force installations, we suggested to enlarge the scope, and received in this endeavor the support of Dr. A. Nachman of AFOSR (Air Force Office of Scientific Research), Bolling Air Force Base, Washington, D.C.