Caracterisation Dantennes Hf Par Mesures En Champ Proche

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Caractérisation d'antennes HF par mesures en champ proche

Author : Nicolas Payet
Publisher :
ISBN 13 :
Total Pages : 146 pages
Book Rating : 4.:/5 (864 download)

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Book Synopsis Caractérisation d'antennes HF par mesures en champ proche by : Nicolas Payet

Download or read book Caractérisation d'antennes HF par mesures en champ proche written by Nicolas Payet and published by . This book was released on 2013 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Après avoir été un peu délaissée pendant les dernières décennies, la bande de fréquences HF (3-30~MHz) connaît aujourd'hui un regain d'intérêt. Initialement réservée aux communications à longue distance, par réflexion des ondes sur l'ionosphère, la bande HF est beaucoup utilisée en radar pour la détection de cibles au-delà de l'horizon radioélectrique. La performance de tels systèmes est conditionnée par la connaissance précise du champ électromagnétique rayonné par les antennes. Les dimensions métriques de ces émetteurs interdisent une mesure directe, in situ, du champ électrique rayonné par l'antenne en zone de champ lointain. Par ailleurs, les modes de propagation, par onde de ciel et par onde de surface, associés aux antennes HF, sont très dépendants de leur environnement. L'objectif est, ici, de définir une méthode de caractérisation d'antennes HF placées au-dessus d'un sol réel, se basant sur une mesure du champ rayonné par la source sur une surface fermée en zone proche. Nous proposons donc deux méthodes de caractérisation d'antenne. La première méthode est issue d'une décomposition modale du champ pour laquelle le sol est pris en compte par la définition d'un coefficient de réflexion. Puis, par le biais d'une expression asymptotique des modes du champ, nous déterminons le champ lointain de l'antenne. La seconde approche utilise une méthode de moments pour déterminer les sources équivalentes modélisant l'antenne sous test. Ces sources équivalentes sont des dipôles électriques élémentaires, verticaux et horizontaux, dont le rayonnement, en champs électrique et magnétique, a été déterminé, de façon analytique, par Peter Bannister. Une méthode de régularisation est associée afin d'extraire, d'une part, une solution physique au problème, et d'autre part, de rendre le système linéaire moins sensible aux bruits de mesure

Mutual Coupling Between Antennas

Author : Trevor S. Bird
Publisher : John Wiley & Sons
ISBN 13 : 1119564980
Total Pages : 484 pages
Book Rating : 4.1/5 (195 download)

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Book Synopsis Mutual Coupling Between Antennas by : Trevor S. Bird

Download or read book Mutual Coupling Between Antennas written by Trevor S. Bird and published by John Wiley & Sons. This book was released on 2021-06-28 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mutual Coupling Between Antennas A guide to mutual coupling between various types of antennas in arrays such as wires, apertures and microstrip patches or antennas co-sited on platforms Mutual Coupling Between Antennas explores the theoretical underpinnings of mutual coupling, offers an up-to-date description of the physical effects of mutual coupling for a variety of antennas, and contains techniques for analysing and assessing its effects. The book puts the topic in historical context, presents an integral equation approach, includes the current techniques, measurement methods, and discusses the most recent advances in the field. With contributions from noted experts on the topic, the book reviews practical aspects of mutual coupling and examines applications that clearly demonstrate where the performance is impacted both positively and negatively. Mutual Coupling Between Antennas contains information on how mutual coupling can be analysed with a wide range of methods from direct computer software using discrete methods, to integral equations and Greens function methods as well as approximate asymptotic methods. This important text: Provides a theoretical background for understanding mutual coupling between various types of antennas Describes the interaction that occurs between antennas, both planned and unplanned Explores a key aspect of arrays in any wireless, radar or sensing system operating at radio frequencies Offers a groundbreaking book on antenna mutual coupling Written for antenna engineers, technical specialists, researchers and students, Mutual Coupling Between Antennas is the first book to examine mutual coupling between various types of antennas including wires, horns, microstrip patches, MIMO antennas, co-sited antennas and arrays in planar or conformal configurations.

Quantum Mechanics, Volume 3

Author : Claude Cohen-Tannoudji
Publisher : John Wiley & Sons
ISBN 13 : 3527345558
Total Pages : 790 pages
Book Rating : 4.5/5 (273 download)

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Book Synopsis Quantum Mechanics, Volume 3 by : Claude Cohen-Tannoudji

Download or read book Quantum Mechanics, Volume 3 written by Claude Cohen-Tannoudji and published by John Wiley & Sons. This book was released on 2019-12-16 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new, third volume of Cohen-Tannoudji's groundbreaking textbook covers advanced topics of quantum mechanics such as uncorrelated and correlated identical particles, the quantum theory of the electromagnetic field, absorption, emission and scattering of photons by atoms, and quantum entanglement. Written in a didactically unrivalled manner, the textbook explains the fundamental concepts in seven chapters which are elaborated in accompanying complements that provide more detailed discussions, examples and applications. * Completing the success story: the third and final volume of the quantum mechanics textbook written by 1997 Nobel laureate Claude Cohen-Tannoudji and his colleagues Bernard Diu and Franck Laloë * As easily comprehensible as possible: all steps of the physical background and its mathematical representation are spelled out explicitly * Comprehensive: in addition to the fundamentals themselves, the books comes with a wealth of elaborately explained examples and applications Claude Cohen-Tannoudji was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris where he also studied and received his PhD in 1962. In 1973 he became Professor of atomic and molecular physics at the Collège des France. His main research interests were optical pumping, quantum optics and atom-photon interactions. In 1997, Claude Cohen-Tannoudji, together with Steven Chu and William D. Phillips, was awarded the Nobel Prize in Physics for his research on laser cooling and trapping of neutral atoms. Bernard Diu was Professor at the Denis Diderot University (Paris VII). He was engaged in research at the Laboratory of Theoretical Physics and High Energy where his focus was on strong interactions physics and statistical mechanics. Franck Laloë was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris. His first assignment was with the University of Paris VI before he was appointed to the CNRS, the French National Research Center. His research was focused on optical pumping, statistical mechanics of quantum gases, musical acoustics and the foundations of quantum mechanics.

Broadband Planar Antennas

Author : Zhi Ning Chen
Publisher : John Wiley & Sons
ISBN 13 : 047087175X
Total Pages : 258 pages
Book Rating : 4.4/5 (78 download)

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Book Synopsis Broadband Planar Antennas by : Zhi Ning Chen

Download or read book Broadband Planar Antennas written by Zhi Ning Chen and published by John Wiley & Sons. This book was released on 2006-05-01 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: The increasing demand for wireless communications has revolutionised the lifestyle of today’s society and one of the key components of wireless technology is antenna design. Broadband planar antennas are the newest generation of antennas boasting the attractive features required, such as broad operating bandwidth, low profile, light weight, low cost and ease of integration into arrays or Radio Frequency (RF) circuits, to make them ideal components of modern communications systems. Research into small and broadband antennas has been spurred by the rapid development of portable wireless communication devices such as cell phones, laptops and personal digital assistants. This all-encompassing volume, Broadband Planar Antennas: Design and Applications, systematically describes the techniques for all planar antennas from microstrip patch antennas, suspended plate antennas and planar inverted-L/F antennas to planar dipole antennas. Also discussed are some of the most recent outcomes such as broadband antenna issues in promising ultra-wideband applications. Clearly describes the fundamentals of planar antennas and categorises them according to their radiation characteristics Introduces the advanced progress in broadband planar antennas for modern wireless communications Includes a wealth of case studies, design guidelines, figures and tables This text is essential reading for antenna, RF and microwave engineers and manufacturers within the telecommunications industry. Its highly accessible approach will also appeal to researchers, postgraduate students and academic lecturers.

Buyology

Author : Martin Lindstrom
Publisher : Currency
ISBN 13 : 0385523890
Total Pages : 274 pages
Book Rating : 4.3/5 (855 download)

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Book Synopsis Buyology by : Martin Lindstrom

Download or read book Buyology written by Martin Lindstrom and published by Currency. This book was released on 2010-02-02 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: NEW YORK TIMES BESTSELLER • “A fascinating look at how consumers perceive logos, ads, commercials, brands, and products.”—Time How much do we know about why we buy? What truly influences our decisions in today’s message-cluttered world? In Buyology, Martin Lindstrom presents the astonishing findings from his groundbreaking three-year, seven-million-dollar neuromarketing study—a cutting-edge experiment that peered inside the brains of 2,000 volunteers from all around the world as they encountered various ads, logos, commercials, brands, and products. His startling results shatter much of what we have long believed about what captures our interest—and drives us to buy. Among the questions he explores: • Does sex actually sell? • Does subliminal advertising still surround us? • Can “cool” brands trigger our mating instincts? • Can our other senses—smell, touch, and sound—be aroused when we see a product? Buyology is a fascinating and shocking journey into the mind of today's consumer that will captivate anyone who's been seduced—or turned off—by marketers' relentless attempts to win our loyalty, our money, and our minds.

Flow Sensing in Air and Water

Author : Horst Bleckmann
Publisher : Springer Science & Business Media
ISBN 13 : 364241446X
Total Pages : 558 pages
Book Rating : 4.6/5 (424 download)

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Book Synopsis Flow Sensing in Air and Water by : Horst Bleckmann

Download or read book Flow Sensing in Air and Water written by Horst Bleckmann and published by Springer Science & Business Media. This book was released on 2014-01-22 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, leading scientists in the fields of sensory biology, neuroscience, physics and engineering explore the basic operational principles and behavioral uses of flow sensing in animals and how they might be applied to engineering applications such as autonomous control of underwater or aerial vehicles. Although humans possess no flow-sensing abilities, countless aquatic (e.g. fish, cephalopods and seals), terrestrial (e.g. crickets and spiders) and aerial (e.g. bats) animals have flow sensing abilities that underlie remarkable behavioral feats. These include the ability to follow silent hydrodynamic trails long after the trailblazer has left the scene, to form hydrodynamic images of their environment in total darkness, and to swim or fly efficiently and effortlessly in the face of destabilizing currents and winds.

Phase Noise and Frequency Stability in Oscillators

Author : Enrico Rubiola
Publisher : Cambridge University Press
ISBN 13 : 9780521153287
Total Pages : 0 pages
Book Rating : 4.1/5 (532 download)

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Book Synopsis Phase Noise and Frequency Stability in Oscillators by : Enrico Rubiola

Download or read book Phase Noise and Frequency Stability in Oscillators written by Enrico Rubiola and published by Cambridge University Press. This book was released on 2010-06-10 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presenting a comprehensive account of oscillator phase noise and frequency stability, this practical text is both mathematically rigorous and accessible. An in-depth treatment of the noise mechanism is given, describing the oscillator as a physical system, and showing that simple general laws govern the stability of a large variety of oscillators differing in technology and frequency range. Inevitably, special attention is given to amplifiers, resonators, delay lines, feedback, and flicker (1/f) noise. The reverse engineering of oscillators based on phase-noise spectra is also covered, and end-of-chapter exercises are given. Uniquely, numerous practical examples are presented, including case studies taken from laboratory prototypes and commercial oscillators, which allow the oscillator internal design to be understood by analyzing its phase-noise spectrum. Based on tutorials given by the author at the Jet Propulsion Laboratory, international IEEE meetings, and in industry, this is a useful reference for academic researchers, industry practitioners, and graduate students in RF engineering and communications engineering.

Extraterrestrial Seismology

Author : Vincent C. H. Tong
Publisher : Cambridge University Press
ISBN 13 : 1107041724
Total Pages : 467 pages
Book Rating : 4.1/5 (7 download)

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Book Synopsis Extraterrestrial Seismology by : Vincent C. H. Tong

Download or read book Extraterrestrial Seismology written by Vincent C. H. Tong and published by Cambridge University Press. This book was released on 2015-06-25 with total page 467 pages. Available in PDF, EPUB and Kindle. Book excerpt: Taking a transdisciplinary approach to seismology, this unique book reviews the most recent developments in planetary seismology, helioseismology, and asteroseismology.

Introduction to Electromagnetic Fields

Author : Clayton R. Paul
Publisher :
ISBN 13 : 9780071002332
Total Pages : 742 pages
Book Rating : 4.0/5 (23 download)

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Book Synopsis Introduction to Electromagnetic Fields by : Clayton R. Paul

Download or read book Introduction to Electromagnetic Fields written by Clayton R. Paul and published by . This book was released on 1987-01-01 with total page 742 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Monitoring soils in the environment with remote sensing and gis

Author : Richard Escadafal
Publisher : IRD Orstom
ISBN 13 :
Total Pages : 674 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Monitoring soils in the environment with remote sensing and gis by : Richard Escadafal

Download or read book Monitoring soils in the environment with remote sensing and gis written by Richard Escadafal and published by IRD Orstom. This book was released on 1996 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt: ISSS congress remote sensing

Principles of Radar and Sonar Signal Processing

Author : Chevalier François Le
Publisher : Artech House
ISBN 13 : 9781608071357
Total Pages : 422 pages
Book Rating : 4.0/5 (713 download)

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Book Synopsis Principles of Radar and Sonar Signal Processing by : Chevalier François Le

Download or read book Principles of Radar and Sonar Signal Processing written by Chevalier François Le and published by Artech House. This book was released on 2002 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Large Sieve

Author : Klaus Friedrich Roth
Publisher :
ISBN 13 :
Total Pages : 20 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis The Large Sieve by : Klaus Friedrich Roth

Download or read book The Large Sieve written by Klaus Friedrich Roth and published by . This book was released on 1969 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Queer Theory in Education

Author : William F. Pinar
Publisher : Routledge
ISBN 13 : 113570645X
Total Pages : 352 pages
Book Rating : 4.1/5 (357 download)

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Book Synopsis Queer Theory in Education by : William F. Pinar

Download or read book Queer Theory in Education written by William F. Pinar and published by Routledge. This book was released on 2012-10-02 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: Theoretical studies in curriculum have begun to move into cultural studies--one vibrant and increasingly visible sector of which is queer theory. Queer Theory in Education brings together the most prominent and promising scholars in the field of education--primarily but not exclusively in curriculum--in the first volume on queer theory in education. In his perceptive introduction, the editor outlines queer theory as it is emerging in the field of education, its significance for all scholars and teachers, and its relation to queer theory in literacy theory and more generally, in the humanities.

Satellite Situation Report

Author : Goddard Space Flight Center. Office of Public Affairs
Publisher :
ISBN 13 :
Total Pages : 366 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Satellite Situation Report by : Goddard Space Flight Center. Office of Public Affairs

Download or read book Satellite Situation Report written by Goddard Space Flight Center. Office of Public Affairs and published by . This book was released on 1977 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Urban Travel and Sustainable Development

Author :
Publisher :
ISBN 13 :
Total Pages : 250 pages
Book Rating : 4.3/5 (555 download)

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Book Synopsis Urban Travel and Sustainable Development by :

Download or read book Urban Travel and Sustainable Development written by and published by . This book was released on 1995 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Handbook of Aerospace Electromagnetic Compatibility

Author : Dr. Reinaldo J. Perez
Publisher : John Wiley & Sons
ISBN 13 : 1119082781
Total Pages : 768 pages
Book Rating : 4.1/5 (19 download)

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Book Synopsis Handbook of Aerospace Electromagnetic Compatibility by : Dr. Reinaldo J. Perez

Download or read book Handbook of Aerospace Electromagnetic Compatibility written by Dr. Reinaldo J. Perez and published by John Wiley & Sons. This book was released on 2018-11-30 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive resource that explores electromagnetic compatibility (EMC) for aerospace systems Handbook of Aerospace Electromagnetic Compatibility is a groundbreaking book on EMC for aerospace systems that addresses both aircraft and space vehicles. With contributions from an international panel of aerospace EMC experts, this important text deals with the testing of spacecraft components and subsystems, analysis of crosstalk and field coupling, aircraft communication systems, and much more. The text also includes information on lightning effects and testing, as well as guidance on design principles and techniques for lightning protection. The book offers an introduction to E3 models and techniques in aerospace systems and explores EMP effects on and technology for aerospace systems. Filled with the most up-to-date information, illustrative examples, descriptive figures, and helpful scenarios, Handbook of Aerospace Electromagnetic Compatibility is designed to be a practical information source. This vital guide to electromagnetic compatibility: • Provides information on a range of topics including grounding, coupling, test procedures, standards, and requirements • Offers discussions on standards for aerospace applications • Addresses aerospace EMC through the use of testing and theoretical approaches Written for EMC engineers and practitioners, Handbook of Aerospace Electromagnetic Compatibility is a critical text for understanding EMC for aerospace systems.

Développement d'une technique de caractérisation des antennes à ouverture basée sur des mesures en champ proche [microforme] : méthode des courants électriques bidimensionnels équivalents

Download Développement d'une technique de caractérisation des antennes à ouverture basée sur des mesures en champ proche [microforme] : méthode des courants électriques bidimensionnels équivalents PDF Online Free

Author : Rachid Abou Elasoued
Publisher : Library and Archives Canada = Bibliothèque et Archives Canada
ISBN 13 : 9780612979178
Total Pages : 120 pages
Book Rating : 4.9/5 (791 download)

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Book Synopsis Développement d'une technique de caractérisation des antennes à ouverture basée sur des mesures en champ proche [microforme] : méthode des courants électriques bidimensionnels équivalents by : Rachid Abou Elasoued

Download or read book Développement d'une technique de caractérisation des antennes à ouverture basée sur des mesures en champ proche [microforme] : méthode des courants électriques bidimensionnels équivalents written by Rachid Abou Elasoued and published by Library and Archives Canada = Bibliothèque et Archives Canada. This book was released on 2004 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: