Etude, conception et fabrication de dispositifs micro-ondes à base de matériaux intelligents type VO2 PDF Download
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Author: Julien Givernaud
Publisher:
ISBN:
Category :
Languages : fr
Pages : 226
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Book Description
Le travail présenté dans ce mémoire concerne la conception et la fabrication de dispositifs micro-ondes reconfigurables basés sur la transition réversible semi-conducteur métal d’un matériau « intelligent » : le dioxyde de vanadium, VO2. Cette transition peut être initiée de différentes manières : thermiquement, électriquement ou optiquement. Dans un premier temps, nous exploitons l’important changement des propriétés électriques de ce matériau soumis à un actionnement thermique et électrique (changement de trois à quatre ordres de grandeur de résistivité entre les deux états) pour réaliser des commutateurs micro-ondes en technologie coplanaire, puis ensuite, des dispositifs plus complexes comme des limiteurs de puissance réarmables et des filtres réjecteurs accordables. Les composants fabriqués présentent des propriétés intéressantes, notamment sur le plan des caractéristiques électriques ou ils montrent un comportement très large bande et de fortes isolations. L’objectif de ce travail est de proposer une solution alternative intéressante aux technologies classiques (semi-conducteurs et dispositifs électromécaniques) utilisées dans la fabrication de composants micro-ondes.
Author: Julien Givernaud
Publisher:
ISBN:
Category :
Languages : fr
Pages : 226
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Book Description
Le travail présenté dans ce mémoire concerne la conception et la fabrication de dispositifs micro-ondes reconfigurables basés sur la transition réversible semi-conducteur métal d’un matériau « intelligent » : le dioxyde de vanadium, VO2. Cette transition peut être initiée de différentes manières : thermiquement, électriquement ou optiquement. Dans un premier temps, nous exploitons l’important changement des propriétés électriques de ce matériau soumis à un actionnement thermique et électrique (changement de trois à quatre ordres de grandeur de résistivité entre les deux états) pour réaliser des commutateurs micro-ondes en technologie coplanaire, puis ensuite, des dispositifs plus complexes comme des limiteurs de puissance réarmables et des filtres réjecteurs accordables. Les composants fabriqués présentent des propriétés intéressantes, notamment sur le plan des caractéristiques électriques ou ils montrent un comportement très large bande et de fortes isolations. L’objectif de ce travail est de proposer une solution alternative intéressante aux technologies classiques (semi-conducteurs et dispositifs électromécaniques) utilisées dans la fabrication de composants micro-ondes.
Author: El Oualkadi, Ahmed
Publisher: IGI Global
ISBN: 1522507744
Category : Technology & Engineering
Languages : en
Pages : 740
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Book Description
Wireless communications have become invaluable in the modern world. The market is going through a revolutionary transformation as new technologies and standards endeavor to keep up with demand for integrated and low-cost mobile and wireless devices. Due to their ubiquity, there is also a need for a simplification of the design of wireless systems and networks. The Handbook of Research on Advanced Trends in Microwave and Communication Engineering showcases the current trends and approaches in the design and analysis of reconfigurable microwave devices, antennas for wireless applications, and wireless communication technologies. Outlining both theoretical and experimental approaches, this publication brings to light the unique design issues of this emerging research, making it an ideal reference source for engineers, researchers, graduate students, and IT professionals.
Author: Leo Maloratsky
Publisher: Elsevier
ISBN: 0080492053
Category : Technology & Engineering
Languages : en
Pages : 385
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Book Description
The growth in RF and wireless/mobile computing devices that operate at microwave frequencies has resulted in explosive demand for integrated circuits capable of operating at such frequencies in order to accomplish functions like frequency division, phase shifting, attenuation, and isolators and circulators for antennas. This book is an introduction to such ICs, combining theory and practical applications of those devices. In addition to this combined theory and application approach, the author discusses the critical importance of differing fabrication materials on the performance of ICs at different frequencies. This is an area often overlooked when choosing ICs for RF and microwave applications, yet it can be a crucial factor in how an IC performs in a given application. - Gives reader a solid background in an increasingly important area of circuit design - Emphasis on combination of theoretical discussions with practical application examples - In-depth discussion of critical, but often overlooked topic of different fabrication material performances at varying frequencies
Author: Alain Berthoz
Publisher: Odile Jacob
ISBN: 2738147453
Category : Science
Languages : en
Pages : 194
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Book Description
“Simplexity, as I understand it, is the range of solutions living organisms have found, despite the complexity of natural processes, to enable the brain to prepare an action and plan for the consequences of it. These solutions are simplifying principles that enable the processing of information or situations, by taking into account past experience and anticipating the future. They are neither caricatures, shortcuts, or summaries. They are new ways of asking questions, sometimes at the cost of occasional detours, in order to achieve faster, more elegant, more effective actions.” A. B. As Alain Berthoz demonstrates in this profoundly original book, simplicity is never easy; it requires suppressing, selecting, connecting, thinking, in order to then act in the best way possible. And what if we, in turn, are inspired by the living world to process the complexity that surrounds us? Alain Berthoz is professor at the Collège de France where he is co-director of the Laboratoire de physiologie de la perception et de l’action. [Laboratory for the physiology of perception and action]. He is a member of the French Academy of Sciences, and is the author of Le Sens du mouvement [The Brain's Sense of Movement] and La Décision [Emotion and Reason].
Author: Alain Berthoz
Publisher: Harvard University Press
ISBN: 9780674009806
Category : Medical
Languages : en
Pages : 356
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Book Description
This interpretation of perception and action allows Alain Berthoz to focus on psychological phenomena: proprioception and kinaesthesis; the mechanisms that maintain balance and co-ordination actions; and basic perceptual and memory processes involved in navigation.
Author: A. Berthoz
Publisher: Oxford University Press, USA
ISBN: 9780198566267
Category : Action theory
Languages : en
Pages : 0
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Book Description
(Play It Like It Is). Matching folio to the album DMB created in tribute to LeRoi Moore, their saxophonist who died in a 2008 accident. The All Music Guide calls it DMB's "richest, and quite possibly best" album to date. 12 songs: Alligator Pie * Baby Blue * Dive In * Funny the Way It Is * Lying in the Hands of God * Seven * Shake Me like a Monkey * Spaceman * Squirm * Time Bomb * Why I Am * You & Me.
Author: David Rutledge
Publisher: Cambridge University Press
ISBN: 9780521646451
Category : Technology & Engineering
Languages : en
Pages : 460
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Book Description
This fascinating book provides a stimulating introduction to analog electronics by analysing the design and construction of a radio transceiver. Essential theoretical background is given along with carefully designed laboratory and homework exercises. The author begins with a thorough description of basic electronic components and simple circuits and goes on to describe the key elements of radio electronics, including filters, amplifiers, oscillators, mixers, and antennas. Laboratory exercises lead the reader through the design, construction, and testing of a popular radio transceiver (the NorCal 40A). A diskette containing the widely known circuit simulation software, Puff, is included in the book. This was the first book to deal with elementary electronics in the context of radio. It can be used as a textbook for introductory analog electronics courses, for more advanced undergraduate classes on radio-frequency electronics, and will also be of great interest to electronics hobbyists and radio enthusiasts.
Author: Grayson Evans
Publisher: Lulu.com
ISBN: 1300965215
Category : Technology & Engineering
Languages : en
Pages : 289
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Book Description
Discover (or rediscover) the fun and magic of building electronic circuits with thermatrons (vacuum tubes). This book has everything you need to know about the art and science of thermatron design and construction. It pulls together, in one easy to read book, thermatron types and characteristics, thermatron homebrew techniques, and how to design audio and RF triode and pentode circuits. The book is written primarily for radio amateurs (or audio equipment builders) that already understands basic electronics but have forgotten or never had the pleasure of working with hollow-state devices. The Second Edition includes over 50+ pages of new and revised material including a new chapter on thermatron oscillator design.
Author: Jonathan L. Mayo
Publisher: Tab Books
ISBN: 9780830632220
Category : Crafts & Hobbies
Languages : en
Pages : 228
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Book Description
A manual for amateur radio enthusiasts discusses the history of packet radio, hardware systems, networking, setting up an amateur packet radio station, and equipment and accessories
Author: Steve Ford
Publisher: American Radio Relay League
ISBN: 0872591034
Category : Technology & Engineering
Languages : en
Pages : 210
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Book Description
