A Generalized Network Formulation for Aperture Problems

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Publisher :
ISBN 13 :
Total Pages : 36 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis A Generalized Network Formulation for Aperture Problems by : Roger F. Harrington

Download or read book A Generalized Network Formulation for Aperture Problems written by Roger F. Harrington and published by . This book was released on 1975 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: A general formulation for aperture problems is given in terms of the method of moments. It applies to any two regions isolated except for coupling through the aperture. The aperture characteristics are expressed in terms of two aperture admittance matrices, one for each region. The admittance matrix for one region is independent of the other region, and hence can be used for any problem involving that region and aperture. The solution can be represented by two generalized n-port networks connected in parallel with current sources. The current sources are related to the tangential magnetic field which exists over the aperture region when the aperture is closed by an electric conductor. Explicit formulations are given for two problems, that of an aperture in a conducting plane with plane-wave excitation, and that of a waveguide feeding an aperture in a conducting plane.

Fractal Apertures in Waveguides, Conducting Screens and Cavities

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Publisher : Springer
ISBN 13 : 3319065351
Total Pages : 208 pages
Book Rating : 4.3/5 (19 download)

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Book Synopsis Fractal Apertures in Waveguides, Conducting Screens and Cavities by : Basudeb Ghosh

Download or read book Fractal Apertures in Waveguides, Conducting Screens and Cavities written by Basudeb Ghosh and published by Springer. This book was released on 2014-06-12 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals with the design and analysis of fractal apertures in waveguides, conducting screens and cavities using numerical electromagnetics and field-solvers. The aim is to obtain design solutions with improved accuracy for a wide range of applications. To achieve this goal, a few diverse problems are considered. The book is organized with adequate space dedicated for the design and analysis of fractal apertures in waveguides, conducting screens and cavities, microwave/millimeter wave applications followed by detailed case-study problems to infuse better insight and understanding of the subject. Finally, summaries and suggestions are given for future work. Fractal geometries were widely used in electromagnetics, specifically for antennas and frequency selective surfaces (FSS). The self-similarity of fractal geometry gives rise to a multiband response, whereas the space-filling nature of the fractal geometries makes it an efficient element in antenna and FSS unit cell miniaturization. Until now, no efforts were made to study the behavior of these fractal geometries for aperture coupling problems. The aperture coupling problem is an important boundary value problem in electromagnetics and used in waveguide filters and power dividers, slotted ground planes, frequency selective surfaces and metamaterials. The present book is intended to initiate a study of the characteristics of fractal apertures in waveguides, conducting screens and cavities. To perform a unified analysis of these entirely dissimilar problems, the “generalized network formulation of the aperture problems” by Mautz and Harrington was extended to multiple-aperture geometry. The authors consider the problem of coupling between two arbitrary regions coupled together via multiple apertures of arbitrary shape. MATLAB codes were developed for the problems and validated with the results available in the literature as well as through simulations on ANSOFT's HFSS.

Fundamentals of Aperture Antennas and Arrays

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Publisher : John Wiley & Sons
ISBN 13 : 1118923561
Total Pages : 452 pages
Book Rating : 4.1/5 (189 download)

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Book Synopsis Fundamentals of Aperture Antennas and Arrays by : Trevor S. Bird

Download or read book Fundamentals of Aperture Antennas and Arrays written by Trevor S. Bird and published by John Wiley & Sons. This book was released on 2016-01-19 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is intended as an advanced text for courses in antennas, with a focus on the mature but vital background field of aperture antennas. The book is aimed at final year, MSc, PhD and Post-Doctoral students, as well as readers who are moving from academia into industry, beginning careers as wireless engineers, system designers, in R&D, or for practising engineers. It assumes the reader has undertaken an earlier course of study on Maxwell's equations, fields and waves. Some of these topics are summarised in the early few chapters in order to provide continuity and background for the remaining chapters. The aperture antennas covered include the main types of horns, reflectors and arrays as well as microstrip patches, reflectarrays and lenses. To provide more than a superficial treatment of arrays, the topic of mutual coupling is covered in greater detail than most similar books in the area. Also included is an introduction to arrays on non-planar surfaces, which is of importance for applications that involve curved surfaces such as in aerodynamics or for making aperture antennas unobtrusive. A chapter is included on some modern aperture antennas to illustrate design techniques beyond the most common types of aperture antennas described in the early chapters. This is to show where advances have recently been made and where they could be improved in the future. Also included are selected topics of a practical nature for aperture antennas, namely fabrication and measurement.

R & D Abstracts

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Publisher :
ISBN 13 :
Total Pages : 536 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis R & D Abstracts by : Technology Reports Centre (Great Britain)

Download or read book R & D Abstracts written by Technology Reports Centre (Great Britain) and published by . This book was released on 1976 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Scientific and Technical Aerospace Reports

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Publisher :
ISBN 13 :
Total Pages : 996 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Scientific and Technical Aerospace Reports by :

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1990 with total page 996 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Generalized Network Design Problems

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Publisher : Walter de Gruyter
ISBN 13 : 3110267683
Total Pages : 216 pages
Book Rating : 4.1/5 (12 download)

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Book Synopsis Generalized Network Design Problems by : Petrica C. Pop

Download or read book Generalized Network Design Problems written by Petrica C. Pop and published by Walter de Gruyter. This book was released on 2012-10-30 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Combinatorial optimization is a fascinating topic. Combinatorial optimization problems arise in a wide variety of important fields such as transportation, telecommunications, computer networking, location, planning, distribution problems, etc. Important and significant results have been obtained on the theory, algorithms and applications over the last few decades. In combinatorial optimization, many network design problems can be generalized in a natural way by considering a related problem on a clustered graph, where the original problem's feasibility constraints are expressed in terms of the clusters, i.e., node sets instead of individual nodes. This class of problems is usually referred to as generalized network design problems (GNDPs) or generalized combinatorial optimization problems. The express purpose of this monograph is to describe a series of mathematical models, methods, propositions, algorithms developed in the last years on generalized network design problems in a unified manner. The book consists of seven chapters, where in addition to an introductory chapter, the following generalized network design problems are formulated and examined: the generalized minimum spanning tree problem, the generalized traveling salesman problem, the railway traveling salesman problem, the generalized vehicle routing problem, the generalized fixed-charge network design problem and the generalized minimum vertex-biconnected network problem. The book will be useful for researchers, practitioners, and graduate students in operations research, optimization, applied mathematics and computer science. Due to the substantial practical importance of some presented problems, researchers in other areas will find this book useful, too.

Fractal Apertures in Waveguides, Conducting Screens and Cavities

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Publisher : Springer
ISBN 13 : 9783319065366
Total Pages : 201 pages
Book Rating : 4.0/5 (653 download)

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Book Synopsis Fractal Apertures in Waveguides, Conducting Screens and Cavities by : Basudeb Ghosh

Download or read book Fractal Apertures in Waveguides, Conducting Screens and Cavities written by Basudeb Ghosh and published by Springer. This book was released on 2014-06-22 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals with the design and analysis of fractal apertures in waveguides, conducting screens and cavities using numerical electromagnetics and field-solvers. The aim is to obtain design solutions with improved accuracy for a wide range of applications. To achieve this goal, a few diverse problems are considered. The book is organized with adequate space dedicated for the design and analysis of fractal apertures in waveguides, conducting screens and cavities, microwave/millimeter wave applications followed by detailed case-study problems to infuse better insight and understanding of the subject. Finally, summaries and suggestions are given for future work. Fractal geometries were widely used in electromagnetics, specifically for antennas and frequency selective surfaces (FSS). The self-similarity of fractal geometry gives rise to a multiband response, whereas the space-filling nature of the fractal geometries makes it an efficient element in antenna and FSS unit cell miniaturization. Until now, no efforts were made to study the behavior of these fractal geometries for aperture coupling problems. The aperture coupling problem is an important boundary value problem in electromagnetics and used in waveguide filters and power dividers, slotted ground planes, frequency selective surfaces and metamaterials. The present book is intended to initiate a study of the characteristics of fractal apertures in waveguides, conducting screens and cavities. To perform a unified analysis of these entirely dissimilar problems, the “generalized network formulation of the aperture problems” by Mautz and Harrington was extended to multiple-aperture geometry. The authors consider the problem of coupling between two arbitrary regions coupled together via multiple apertures of arbitrary shape. MATLAB codes were developed for the problems and validated with the results available in the literature as well as through simulations on ANSOFT's HFSS.

Electromagnetic Scattering

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Publisher : Elsevier
ISBN 13 : 0323142435
Total Pages : 812 pages
Book Rating : 4.3/5 (231 download)

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Book Synopsis Electromagnetic Scattering by : Piergiorgio Uslenghi

Download or read book Electromagnetic Scattering written by Piergiorgio Uslenghi and published by Elsevier. This book was released on 2012-12-02 with total page 812 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electromagnetic Scattering is a collection of studies that aims to discuss methods, state of the art, applications, and future research in electromagnetic scattering. The book covers topics related to the subject, which includes low-frequency electromagnetic scattering; the uniform asymptomatic theory of electromagnetic edge diffraction; analyses of problems involving high frequency diffraction and imperfect half planes; and multiple scattering of waves by periodic and random distribution. Also covered in this book are topics such as theories of scattering from wire grid and mesh structures; the electromagnetic inverse problem; computational methods for transmission of waves; and developments in the use of complex singularities in the electromagnetic theory. Engineers and physicists who are interested in the study, developments, and applications of electromagnetic scattering will find the text informative and helpful.

1997 International Symposium on Electromagnetic Compatibility

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Publisher : Institute of Electrical & Electronics Engineers(IEEE)
ISBN 13 :
Total Pages : 564 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis 1997 International Symposium on Electromagnetic Compatibility by : Linchang Zhang

Download or read book 1997 International Symposium on Electromagnetic Compatibility written by Linchang Zhang and published by Institute of Electrical & Electronics Engineers(IEEE). This book was released on 1997 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is second of its series started 1992 in China. The 1997 symposium will provide a forum for researchers and engineers to present their latest research results on the R7D in the field of EMC.

Review of Progress in Quantitative Nondestructive Evaluation

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Publisher : Springer Science & Business Media
ISBN 13 : 9780306455971
Total Pages : 2304 pages
Book Rating : 4.4/5 (559 download)

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Book Synopsis Review of Progress in Quantitative Nondestructive Evaluation by : Donald O. Thompson

Download or read book Review of Progress in Quantitative Nondestructive Evaluation written by Donald O. Thompson and published by Springer Science & Business Media. This book was released on 1997 with total page 2304 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Numerical Techniques in Electromagnetics with MATLAB

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Publisher : CRC Press
ISBN 13 : 1420063103
Total Pages : 601 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Numerical Techniques in Electromagnetics with MATLAB by : Matthew N.O. Sadiku

Download or read book Numerical Techniques in Electromagnetics with MATLAB written by Matthew N.O. Sadiku and published by CRC Press. This book was released on 2018-10-08 with total page 601 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite the dramatic growth in the availability of powerful computer resources, the EM community lacks a comprehensive text on the computational techniques used to solve EM problems. The first edition of Numerical Techniques in Electromagnetics filled that gap and became the reference of choice for thousands of engineers, researchers, and students. This third edition of the bestselling text reflects the continuing increase in awareness and use of numerical techniques and incorporates advances and refinements made in recent years. Most notable among these are the improvements made to the standard algorithm for the finite-difference time-domain (FDTD) method and treatment of absorbing boundary conditions in FDTD, finite element, and transmission-line-matrix methods. The author also has added a chapter on the method of lines. Numerical Techniques in Electromagnetics with MATLAB®, Third Edition continues to teach readers how to pose, numerically analyze, and solve EM problems, to give them the ability to expand their problem-solving skills using a variety of methods, and to prepare them for research in electromagnetism. Now the Third Edition goes even further toward providing a comprehensive resource that addresses all of the most useful computation methods for EM problems and includes MATLAB code instead of FORTRAN.

Scientific and Technical Aerospace Reports

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Publisher :
ISBN 13 :
Total Pages : 938 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis Scientific and Technical Aerospace Reports by :

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1986 with total page 938 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Advances in Electronics and Electron Physics

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Publisher : Academic Press
ISBN 13 : 0080577288
Total Pages : 363 pages
Book Rating : 4.0/5 (85 download)

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Book Synopsis Advances in Electronics and Electron Physics by :

Download or read book Advances in Electronics and Electron Physics written by and published by Academic Press. This book was released on 1985-03-07 with total page 363 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Electronics and Electron Physics

IETE Technical Review

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Publisher :
ISBN 13 :
Total Pages : 546 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis IETE Technical Review by :

Download or read book IETE Technical Review written by and published by . This book was released on 2001 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Electromagnetic Shielding

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Publisher : John Wiley & Sons
ISBN 13 : 0470268476
Total Pages : 385 pages
Book Rating : 4.4/5 (72 download)

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Book Synopsis Electromagnetic Shielding by : Salvatore Celozzi

Download or read book Electromagnetic Shielding written by Salvatore Celozzi and published by John Wiley & Sons. This book was released on 2008-05-16 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: The definitive reference on electromagnetic shielding materials, configurations, approaches, and analyses This reference provides a comprehensive survey of options for the reduction of the electromagnetic field levels in prescribed areas. After an introduction and an overview of available materials, it discusses figures of merit for shielding configurations, the shielding effectiveness of stratified media, numerical methods for shielding analyses, apertures in planar metal screens, enclosures, and cable shielding. Up to date and comprehensive, Electromagnetic Shielding: Explores new and innovative techniques in electromagnetic shielding Presents a critical approach to electromagnetic shielding that highlights the limits of formulations based on plane-wave sources Analyzes aspects not normally considered in electromagnetic shielding, such as the effects of the content of the shielding enclosures Includes references at the end of each chapter to facilitate further study The last three chapters discuss frequency-selective shielding, shielding design procedures, and uncommon ways of shielding—areas ripe for further research. This is an authoritative, hands-on resource for practicing telecommunications and electrical engineers, as well as researchers in industry and academia who are involved in the design and analysis of electromagnetic shielding structures.

Annales des télécommunications

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Publisher :
ISBN 13 :
Total Pages : 372 pages
Book Rating : 4.:/5 (334 download)

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Book Synopsis Annales des télécommunications by :

Download or read book Annales des télécommunications written by and published by . This book was released on 1997 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Modern Topics in Electromagnetics and Antennas

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Publisher :
ISBN 13 :
Total Pages : 456 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Modern Topics in Electromagnetics and Antennas by : Henning Bach

Download or read book Modern Topics in Electromagnetics and Antennas written by Henning Bach and published by . This book was released on 1977 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: