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Conception De Recepteurs A Faible Bruit Dans Le Domaine Millimetrique En Etudiant Le Bruit Electrique Dans Les Circuits Non Lineaires Micro Ondes
Download Conception De Recepteurs A Faible Bruit Dans Le Domaine Millimetrique En Etudiant Le Bruit Electrique Dans Les Circuits Non Lineaires Micro Ondes full books in PDF, epub, and Kindle. Read online Conception De Recepteurs A Faible Bruit Dans Le Domaine Millimetrique En Etudiant Le Bruit Electrique Dans Les Circuits Non Lineaires Micro Ondes ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Conception de récepteurs à faible bruit dans le domaine millimétrique en étudiant le bruit électrique dans les circuits non linéaires micro-ondes by : Christophe Boyavalle
Download or read book Conception de récepteurs à faible bruit dans le domaine millimétrique en étudiant le bruit électrique dans les circuits non linéaires micro-ondes written by Christophe Boyavalle and published by . This book was released on 1997 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dans tout systeme de communication, le signal transportant l'information de l'emetteur au recepteur se trouve au cours de sa propagation denature par divers bruits. Aussi, la reception et le traitement de signaux de faibles puissances, necessitent l'utilisation de moyens techniques appropries pour favoriser la diminution du bruit. Dans cette perspective d'immunite au bruit, nous avons presente dans ce memoire la realisation de recepteurs a faible bruit dans le domaine millimetrique, en etudiant le bruit dans les circuits non lineaires afin de minimiser le bruit du melangeur. S'appuyant sur la synthese des differents modes et architectures de melange, et sur l'etude du bruit dans les melangeurs, differentes fonctions de melange ont ete concues en optimisant le facteur de bruit, les niveaux d'intermodulation, la consommation et la taille du circuit. L'etape ultime de cette demarche nous a conduit a la realisation d'un circuit multifonctions en accord avec la description d'une chaine de reception. Ce circuit se compose d'un doubleur de frequence pour l'acces de l'oscillateur local, et d'un melangeur doublement equilibre a fets froids associe a un amplificateur fi. Cette realisation a demontre la faisabilite de circuits complexes dans le domaine millimetrique. L'excellente concordance entre les resultats de simulations et les mesures des differents circuits realises, montre la validite des modeles non lineaire de transistor que nous avons elabores. De plus, compte tenu des resultats obtenus sur les circuits quad5 (melangeur doublement equilibre) et dl28 (circuit multifonctions) leur phase d'industrialisation a ete engagee. Enfin, la production de tels circuits offre des perspectives de vente a grande echelle, avec des objectifs de faible cout en terme de surface et de consommation.
Book Synopsis Étude du bruit électrique dans les dispositifs fonctionnant en régime non linéaire by : Cédric Chambon
Download or read book Étude du bruit électrique dans les dispositifs fonctionnant en régime non linéaire written by Cédric Chambon and published by . This book was released on 2007 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Le travail présenté dans cette thèse est centré sur l'étude du bruit hyperfréquence lorsque les composants et circuits actifs sont soumis à de forts signaux. Ceci peut être le cas des amplificateurs faible bruit utilisés dans les récepteurs large bande qui seront désensibilisés. Les mélangeurs et les oscillateurs sont aussi à considérer. La première partie de cette thèse est consacrée à la présentation d'un modèle comportemental permettant de prévoir notamment l'interaction entre un signal sinusoïdal et un bruit blanc. Le modèle théorique est confronté avec des mesures effectuées pour différentes conditions de fonctionnement et l'accord obtenu est satisfaisant. Plusieurs amplificateurs sont ainsi comparés et le modèle comportemental est utilisé pour étudier leur bruit propre. La seconde partie aborde les techniques de mesure développées au cours de nos travaux pour mesurer le facteur de bruit et les paramètres de bruit de dispositifs micro-ondes en présence d'un fort signal. Nous proposons ensuite une méthode originale permettant de déterminer les quatre paramètres de bruit de transistors et d'amplificateurs fonctionnant en régime non-linéaire. Les résultats obtenus sont comparés de manière indirecte avec des mesures de bruit de phase résiduel. La dernière partie concerne la conception d'amplificateurs faible bruit en régime de fonctionnement non-linéaire. Différents transistors bipolaires sur silicium ont ainsi été caractérisés et un facteur de mérite a été trouvé de manière à choisir le meilleur composant en terme de facteur de bruit et de linéarité. Finalement les résultats de simulation démontrent l'intérêt de concevoir des circuits faible bruit qui fonctionnent en régime fortement non-linéaire.
Book Synopsis Conception et réalisation d'amplificateurs cryotechniques faible bruit à base de transistors à effet de champ dans la bande 16-20 GHz by : Frédéric Sejalon
Download or read book Conception et réalisation d'amplificateurs cryotechniques faible bruit à base de transistors à effet de champ dans la bande 16-20 GHz written by Frédéric Sejalon and published by . This book was released on 1993 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: LES AMPLIFICATEURS CRYOTECHNIQUES FAIBLE BRUIT A BASE DE TRANSISTORS A HAUTE MOBILITE ELECTRONIQUE TROUVENT DES APPLICATIONS A BORD DE SATELLITES OU SONDES SPATIALES DANS TOUT SYSTEME DONT L'ANTENNE DE RECEPTION NE VOIT PAS LA TERRE: RADIOASTRONOMIE, SCIENCES DE L'UNIVERS, LIAISONS INTER-SATELLITES. CE MEMOIRE COMPREND DONC UNE PREMIERE PARTIE CONSACREE A LA PHYSIQUE ET AU FONCTIONNNEMENT, EN PARTICULIER A BASSE TEMPERATURE, DES TRANSISTORS A HAUTE MOBILITE ELECTRONIQUE (HEMT). DANS LA SECONDE PARTIE, NOUS TRAITONS DE LA CARACTERISATION AUX TEMPERATURES CRYOGENIQUES, TANT EN PARAMETRES S QU'EN PARAMETRES DE BRUIT DES COMPOSANTS HEMT EN PUCE. UNE METHODE ORIGINALE PERMETTANT DE S'AFFRANCHIR DU GRADIENT THERMIQUE QUE SUPPORTENT LES CABLES DE LIAISON, BASEE SUR LA MESURE D'UN TRANSISTOR A EFFET DE CHAMP NON POLARISE MONTE EN GRILLE COMMUNE, EST PRESENTEE. DES DIFFERENTS RESULTATS EXPERIMENTAUX SONT ENSUITE EXTRAITES LES EVOLUTIONS DES ELEMENTS DU SCHEMA EQUIVALENT ET DES SOURCES DE BRUIT DU TRANSISTOR EN FONCTION DE LA TEMPERATURE ET DE LA POLARISATION. ENFIN, NOUS ABORDONS LA CONCEPTION ET LA REALISATION DE L'AMPLIFICATEUR CRYOTECHNIQUE. APRES AVOIR SELECTIONNE LE COMPOSANT ET LA TECHNOLOGIE LES MIEUX ADAPTES AU FONCTIONNEMENT EN BASSE TEMPERATURE, NOUS DONNONS LES ELEMENTS NECESSAIRES A LA DETERMINATION D'UNE TOPOLOGIE OPTIMALE D'AMPLIFICATEUR FAIBLE BRUIT. LES RESULTATS DE SIMULATION OBTENUS SUR LES DIFFERENTS AMPLIFICATEURS REALISES AU MOYEN DE LOGICIEL D'AIDE AU DEVELOPPEMENT DE CIRCUITS MICRO-ONDES SONT PRESENTES, AVANT D'ANALYSER LES RESULTATS EXPERIMENTAUX RELEVES A LA TEMPERATURE DE L'AZOTE LIQUIDE
Book Synopsis Quantum Communications and Cryptography by : Alexander V. Sergienko
Download or read book Quantum Communications and Cryptography written by Alexander V. Sergienko and published by CRC Press. This book was released on 2018-10-03 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: All current methods of secure communication such as public-key cryptography can eventually be broken by faster computing. At the interface of physics and computer science lies a powerful solution for secure communications: quantum cryptography. Because eavesdropping changes the physical nature of the information, users in a quantum exchange can easily detect eavesdroppers. This allows for totally secure random key distribution, a central requirement for use of the one-time pad. Since the one-time pad is theoretically proven to be undecipherable, quantum cryptography is the key to perfect secrecy. Quantum Communications and Cryptography is the first comprehensive review of the past, present, and potential developments in this dynamic field. Leading expert contributors from around the world discuss the scientific foundations, experimental and theoretical developments, and cutting-edge technical and engineering advances in quantum communications and cryptography. The book describes the engineering principles and practical implementations in a real-world metropolitan network as well as physical principles and experimental results of such technologies as entanglement swapping and quantum teleportation. It also offers the first detailed treatment of quantum information processing with continuous variables. Technologies include both free-space and fiber-based communications systems along with the necessary protocols and information processing approaches. Bridging the gap between physics and engineering, Quantum Communications and Cryptography supplies a springboard for further developments and breakthroughs in this rapidly growing area.
Book Synopsis Submarine Mass Movements and Their Consequences by : Vasilios Lykousis
Download or read book Submarine Mass Movements and Their Consequences written by Vasilios Lykousis and published by Springer Science & Business Media. This book was released on 2007-09-14 with total page 407 pages. Available in PDF, EPUB and Kindle. Book excerpt: With contributions from leading researchers in science and engineering, this book provides a global perspective on submarine mass movements and their consequences. Authors report on new findings from fundamental as well as site-specific studies from around the world. All studies relied on the most recent technologies, including multi-beam sonar imaging techniques, 3D seismic analysis, slope stability analysis, debris flow, and tsunami modeling.
Book Synopsis Fundamentals of Short-range FM Radar by : Igor V. Komarov
Download or read book Fundamentals of Short-range FM Radar written by Igor V. Komarov and published by Artech House. This book was released on 2003 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Here's a unique new resource that offers you a solid understanding of the fundamental theory, operation principles and applications of short-range frequency modulated continuous wave (FM CW) radar. You learn how to choose the structural scheme of short-range FM radar, and determine the optimal algorithm of useful signal processing necessary for ensuring the technical characteristic of radar. Moreover, this practical reference shows you how to ensure the minimum level of radar signal parasitic amplitude, calculate modulation signal distortion, and compensate for nonlinear distortion.
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 Microwave and RF Design of Wireless Systems by : David M. Pozar
Download or read book Microwave and RF Design of Wireless Systems written by David M. Pozar and published by John Wiley & Sons. This book was released on 2000-11-29 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: David Pozar, author of Microwave Engineering, Second Edition, has written a new text that introduces students to the field of wireless communications. This text offers a quantitative and, design-oriented presentation of the analog RF aspects of modern wireless telecommunications and data transmission systems from the antenna to the baseband level. Other topics include noise, intermodulation, dynamic range, system aspects of antennas and filter design. This unique text takes an integrated approach to topics usually offered in a variety of separate courses on topics such as antennas and proagation, microwave systems and circuits, and communication systems. This approach allows for a complete presentation of wireless telecommunications systems designs. The author's goal with this text is for the student to be able to analyze a complete radio system from the transmitter through the receiver front-end, and quantitatively evaluate factors. Suitable for a one-semester course, at the senior or first year graduate level. Note certain sections have been denoted as advanced topics, suitable for graduate level courses.
Book Synopsis The RF and Microwave Handbook by : Mike Golio
Download or read book The RF and Microwave Handbook written by Mike Golio and published by CRC Press. This book was released on 2000-12-20 with total page 1377 pages. Available in PDF, EPUB and Kindle. Book excerpt: The recent shift in focus from defense and government work to commercial wireless efforts has caused the job of the typical microwave engineer to change dramatically. The modern microwave and RF engineer is expected to know customer expectations, market trends, manufacturing technologies, and factory models to a degree that is unprecedented in the
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 Radar Technology Encyclopedia by : David Knox Barton
Download or read book Radar Technology Encyclopedia written by David Knox Barton and published by Artech House Publishers. This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Here's the quick, easy way to pinpoint the exact information you need from the 511-page Radar Technology Encyclopedia. The CD-ROM edition includes every page of the print edition -- explaining more than 5000 terms and concepts related to radar, antenna, and microwave technology. Edited by two leading radar experts from the US and Russia, the Encyclopedia includes descriptions and illustrations of all types of radar systems, including information on Russian systems that was previously unavailable outside of that country.
Book Synopsis Frequency Modulated Radar by : David George Croft Luck
Download or read book Frequency Modulated Radar written by David George Croft Luck and published by . This book was released on 2012-07-01 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Radar System Engineering by : Louis Nicot Ridenour
Download or read book Radar System Engineering written by Louis Nicot Ridenour and published by . This book was released on 2013-09 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contributing Authors Include E. M. Purcell, A. J. F. Siegert, M. H. Johnson And Others.
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.
