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Etude De Lintegrite Du Signal Dans Les Dispositifs Millimetriques Associes Aux Antennes
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Book Synopsis Etude de l'intégrité du signal dans les dispositifs millimétriques associés aux antennes by : Anne Chousseaud
Download or read book Etude de l'intégrité du signal dans les dispositifs millimétriques associés aux antennes written by Anne Chousseaud and published by . This book was released on 2000 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: LA SATURATION GRADUELLE DES BANDES DE FREQUENCE CONVENTIONNELLES ET LES CONTRAINTES DE MINIATURISATION ONT PROGRESSIVEMENT CONDUIT A DEVELOPPER DES DISPOSITIFS FONCTIONNANT A DES FREQUENCES DE PLUS EN PLUS ELEVEES. CE MEMOIRE EST CONSACRE A LA MODELISATION NUMERIQUE ET A L'ETUDE ELECTROMAGNETIQUE, PAR LA METHODE DES DIFFERENCES FINIES, DE SYSTEMES ASSOCIES AUX ANTENNES ET FONCTIONNANT AUX FREQUENCES MILLIMETRIQUES 30 GHZ ; 300 GHZ. IL S'ATTACHE A METTRE EN EVIDENCE LES PHENOMENES QUI APPARAISSENT AVEC LA MONTEE EN FREQUENCE ET NUISENT A L'INTEGRITE DU SIGNAL. C'EST LE CAS DES SOURCES D'ATTENUATION DANS LES CONDUCTEURS, DANS LES DISCONTINUITES DE LA STRUCTURE OU DES INTERACTIONS DE COUPLAGE ENTRE ELEMENTS METALLIQUES. CES DIFFERENTES ETUDES ONT ETE MENEES DANS LE CAS D'UN RESEAU D'ANTENNES IMPRIMEES ET ONT CONDUIT A LA VALIDATION D'UN OUTIL PERMETTANT DE MODELISER LES PERTES DE CONDUCTION DIRECTEMENT DANS LE CODE DE CALCUL FDTD. PAR AILLEURS, IL N'EST PAS TOUJOURS POSSIBLE, MALGRE LA PUISSANCE DES CALCULATEURS ACTUELS, DE SIMULER CES STRUCTURES INTEGRALEMENT DU FAIT DE LEUR COMPLEXITE, DES VOLUMES ET DES TEMPS DE CALCUL MIS EN UVRE. AUSSI, EST-IL INTERESSANT DE POUVOIR REMPLACER LES SOUS-RESEAUX DE LA STRUCTURE, PAR LEUR IMPEDANCE EQUIVALENTE, AFIN DE LES SIMPLIFIER. LA PRESENCE DE COMPOSANTS ACTIFS DANS UN CIRCUIT PEUT AUSSI CONSTITUER UNE PERTURBATION. LEUR MODELISATION ET CELLE DES CONNEXIONS, QUI DOIVENT ETRE A LA FOIS REALISTES ET ADAPTEES, EST ALORS NECESSAIRE. CES TRAVAUX SE SONT ACHEVES PAR LE DEVELOPPEMENT DE COMPOSANTS DE TYPE C.M.S. (COMPOSANTS MONTES EN SURFACE) AUX FREQUENCES MILLIMETRIQUES ET REUTILISANT LES OUTILS DE FABRICATION STANDARDS. DES PHENOMENES LIES A LA MONTEE EN FREQUENCE ONT ETE MIS EN EVIDENCE (MODES DE CAVITE, EFFETS DE COUPLAGE ENTRE LES ACCES DE POLARISATION).
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:
Book Synopsis Ultra Wide Band Antennas by : Xavier Begaud
Download or read book Ultra Wide Band Antennas written by Xavier Begaud and published by John Wiley & Sons. This book was released on 2013-03-04 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra Wide Band Technology (UWB) has reached a level of maturity that allows us to offer wireless links with either high or low data rates. These wireless links are frequently associated with a location capability for which ultimate accuracy varies with the inverse of the frequency bandwidth. Using time or frequency domain waveforms, they are currently the subject of international standards facilitating their commercial implementation. Drawing up a complete state of the art, Ultra Wide Band Antennas is aimed at students, engineers and researchers and presents a summary of internationally recognized studies.
Download or read book MIMO written by Alain Sibille and published by Academic Press. This book was released on 2010-12-03 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: Foreword from Arogyaswami Paulraj, Professor (Emeritus), Stanford University (USA) - The first book to show how MIMO principles can be implemented in today's mobile broadband networks and components - Explains and solves some of the practical difficulties that arise in designing and implementing MIMO systems - Both theory and implementation sections are written in the context of the most recent standards: IEEE 802.11n (WiFi); IEEE 802.16 (WIMAX); 4G networks (3GPP/3GPP2, LTE)
Book Synopsis Pervasive Mobile and Ambient Wireless Communications by : Roberto Verdone
Download or read book Pervasive Mobile and Ambient Wireless Communications written by Roberto Verdone and published by Springer Science & Business Media. This book was released on 2012-01-02 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reporting the findings of COST 2100, a major European intergovernmental project, this volume offers system designers a good source of guidelines based on channel characterization and measurement-based modeling, as well as worthwhile ideas for future research.
Book Synopsis Governance, Regulation and Powers on the Internet by : Eric Brousseau
Download or read book Governance, Regulation and Powers on the Internet written by Eric Brousseau and published by Cambridge University Press. This book was released on 2012-04-23 with total page 463 pages. Available in PDF, EPUB and Kindle. Book excerpt: An interdisciplinary survey of the issues surrounding the governance of the Internet.
Book Synopsis Modern Radar Detection Theory by : Antonio De Maio
Download or read book Modern Radar Detection Theory written by Antonio De Maio and published by IET. This book was released on 2015-11-25 with total page 395 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern radar detection is the new frontier for advanced radar systems capable of operating in challenging scenarios with a plurality of interference sources, both manmade and natural. Written by top researchers and recognized leaders in the field, this is the first book to provide a comprehensive understanding of the current research trends in modern radar detection. It updates readers with the latest radar signal processing algorithms now capable with high-speed computer chips and sophisticated programs. It also includes examples and applications from real systems. This is essential reading for radar systems design engineers within aerospace companies, military radar engineers, and aerospace contractors/consultants.
Book Synopsis Green Networking by : Francine Krief
Download or read book Green Networking written by Francine Krief and published by John Wiley & Sons. This book was released on 2012-12-13 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on green networking, which is an important topic for the scientific community composed of engineers, academics, researchers and industrialists working in the networking field. Reducing the environmental impact of the communications infrastructure has become essential with the ever increasing cost of energy and the need for reducing global CO2 emissions to protect our environment. Recent advances and future directions in green networking are presented in this book, including energy efficient networks (wired networks, wireless networks, mobile networks), adaptive networks (cognitive radio networks, green autonomic networking), green terminals, and industrial research into green networking (smart city, etc.).
Book Synopsis Engineering Acoustics by : Michael Möser
Download or read book Engineering Acoustics written by Michael Möser and published by Springer Science & Business Media. This book was released on 2009-09-01 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt: Suitable for both individual and group learning, Engineering Acoustics focuses on basic concepts and methods to make our environments quieter, both in buildings and in the open air. The author’s tutorial style derives from the conviction that understanding is enhanced when the necessity behind the particular teaching approach is made clear. He also combines mathematical derivations and formulas with extensive explanations and examples to deepen comprehension. Fundamental chapters on the physics and perception of sound precede those on noise reduction (elastic isolation) methods. The last chapter deals with microphones and loudspeakers. Moeser includes major discoveries by Lothar Cremer, including the optimum impedance for mufflers and the coincidence effect behind structural acoustic transmission. The appendix gives a short introduction on the use of complex amplitudes in acoustics.
Book Synopsis Coherent Optical Processing by : Henry J. Caulfield
Download or read book Coherent Optical Processing written by Henry J. Caulfield and published by . This book was released on 1975 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific Canadian Mechanics' Magazine and Patent Office Record by : Canada. Patent Office
Download or read book Scientific Canadian Mechanics' Magazine and Patent Office Record written by Canada. Patent Office and published by . This book was released on 1966-03 with total page 1070 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advanced Ultrawideband Radar by : James D. Taylor
Download or read book Advanced Ultrawideband Radar written by James D. Taylor and published by CRC Press. This book was released on 2016-12-19 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the latest theory, developments, and applications related to high resolution materials-penetrating sensor systems. An international team of expert researchers explains the problems and solutions for developing new techniques and applications. Subject areas include ultrawideband (UWB) signals propagation and scattering, materials-penetrating radar techniques for small object detection and imaging, biolocation using holographic techniques, tomography, medical applications, nondestructive testing methods, electronic warfare principles, through-the-wall radar propagation effects, and target identification through measuring the target return signal spectrum changes.
Book Synopsis Cognitive Radio Systems by : Wei Wang
Download or read book Cognitive Radio Systems written by Wei Wang and published by . This book was released on 2009 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cognitive radio is a hot research area for future wireless communications in the recent years. In order to increase the spectrum utilization, cognitive radio makes it possible for unlicensed users to access the spectrum unoccupied by licensed users. Cognitive radio let the equipments more intelligent to communicate with each other in a spectrum-aware manner and provide a new approach for the co-existence of multiple wireless systems. The goal of this book is to provide highlights of the current research topics in the field of cognitive radio systems. The book consists of 17 chapters, addressing various problems in cognitive radio systems.
