Download or read book R alisation et caract risation d un laser DFB bi mode pour applications radio sur fibre written by Stéphane Ginestar and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: La génération de signaux microondes, millimétriques, voire THz par voie optique est actuellement une solution technique privilégiée pour la réalisation de systèmes de (télé)communications mobiles haut débit mais encore, les réseaux de distribution d'oscillateurs locaux et de signaux d'observation ou de radar intrasatellitaires, la distribution de signaux vidéo, la communication automobile, les systèmes de visualisation THz pour la sécurité, etc... Nous reportons ici la réalisation et la caractérisation d'une source optique ultra-compacte en matériau semiconducteur permettant de générer deux modes optiques séparés de la fréquence que l'on désire créer au niveau de la photodétection. Cette source prend la forme d'un laser DFB bi-longueur d'onde émettant dans la gamme de longueurs d'onde autour de 1,55μm. Le composant a été fabriqué chez Alcatel-Thales III-VLab à partir d'une technologie propriétaire de laser DFB et dans le cade du projet Européen IPHOBAC. Différents objectifs avaient été fixés pour ce composant: accordabilité de l'écartement intermodal jusque 300 GHz, largeur de raie de l'ordre du MHz et divergence dans le plan horizontal et vertical de 10°. Le premier objectif a été atteint par la réalisation de deux lasers DFB dont l'écart de pas de réseau est différent de 0,3nm et par la variation des courants d'injection de chaque section. Le second a été globalement atteint par l'utilisation d'une structure active à puits quantiques, une nouvelle version du composant utilisant des boites quantiques devrait remplir complètement cet objectif. Le dernier objectif a été partiellement atteint par la conception et l'adjonction d'un adaptateur de mode en sortie de composant, la divergence obtenue est de 10°x17° (HxV). Dans le plan vertical, les 10° de divergence n'ont pas pu être obtenus principalement à cause de la structure du composant et des limitations que l'on s'était imposées sur la longueur totale de celui-ci.
Download or read book Etudes et conceptions des structures lasers r seaux chantillonn s pour des applications radio fibre DWDM written by Magdy Hussein Mourad and published by . This book was released on 2000 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cette these est consacree a la conception et l'etude theorique par modelisation numerique des lasers inp comportant dans leur cavite un reseau echantillonne. Deux configurations ont ete concues et etudiees. La premiere est un laser a une seule section comportant un reseau echantillonne etendu sur toute la longueur du laser. Grace aux proprietes particulieres de filtrage du reseau echantillonne, nous montrons que ce type de laser peut conduire a un fonctionnement de type bimode dont l'ecart en frequence est defini par les parametres geometriques et physiques de ce nouveau laser. Le probleme classique du spatial hole burning qui attenuait un des deux modes du laser a ete resolu et interprete en utilisant pour la premiere fois, un reseau echantillonne dephase. Il a aussi ete demontre que l'optimisation du coefficient de couplage peut diminuer la dependance de l'ecart entre les modes du laser par une variation de la longueur de la cavite. Par consequence, l'application visee avec ce laser est la transmission fibre-radio a 60ghz. La deuxieme configuration est un laser a deux sections integrees monolithiquement dont l'une est une cavite perot fabry et l'autre une cavite comportant un reseau echantillonne. Ces deux sections sont alimentees par des courants differents, au dessus du seuil pour la cavite pf et sous le seuil pour l'autre section. Nous montrons en utilisant l'effet vernier entre les spectres optiques de la cavite pf et celui du filtre du reseau echantillonne, qu'il est possible d'obtenir ainsi un laser monomode accordable par bond. L'application visee ici est la transmission optique dwdm.
Download or read book Philostratus written by Philostratus (the Athenian) and published by . This book was released on 1912 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analecta Or Materials For a History of Remarkable Providences Mostly Relating to Scotch Ministers and Christians written by Robert Wodrow and published by BoD – Books on Demand. This book was released on 2024-05-25 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reprint of the original, first published in 1842.
Download or read book The Electronics of Radio written by David Rutledge and published by Cambridge University Press. This book was released on 1999-08-13 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book The Packet Radio Handbook written by Jonathan L. Mayo and published by Tab Books. This book was released on 1989 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Download or read book Hollow State Design 2nd Edition written by Grayson Evans and published by Lulu.com. This book was released on 2013-04-24 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Amateur Radio Techniques written by John Patrick Hawker and published by . This book was released on 1968 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ARRL s HF Digital Handbook written by Steve Ford and published by American Radio Relay League. This book was released on 2007 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sams Teach Yourself Arduino Programming in 24 Hours written by Richard Blum and published by Pearson Education. This book was released on 2014 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: In just 24 sessions of one hour or less, Sams Teach Yourself Arduino Programming in 24 Hours teaches you C programmingon Arduino, so you can start creating inspired "DIY" hardwareprojects of your own! Using this book's straightforward, step-by-stepapproach, you'll walk through everything from setting up yourprogramming environment to mastering C syntax and features, interfacing your Arduino to performing full-fledged prototyping.Every hands-on lesson and example builds on what you've alreadylearned, giving you a rock-solid foundation for real-world success! Step-by-step instructions carefully walk you through the most common Arduino programming tasks. Quizzes at the end of each chapter help you test your knowledge. By the Way notes present interesting information related to the discussion. Did You Know? tips offer advice or show you easier ways to perform tasks. Watch Out! cautions alert you to possible problems and give you advice on how to avoid them. Learn how to... Get the right Arduino hardware and accessories for your needs Download the Arduino IDE, install it, and link it to your Arduino Quickly create, compile, upload, and run your first Arduino program Master C syntax, decision control, strings, data structures, and functions Use pointers to work with memory--and avoid common mistakes Store data on your Arduino's EEPROM or an external SD card Use existing hardware libraries, or create your own Send output and read input from analog devices or digital interfaces Create and handle interrupts in software and hardware Communicate with devices via the SPI interface and I2C protocol Work with analog and digital sensors Write Arduino C programs that control motors Connect an LCD to your Arduino, and code the output Install an Ethernet shield, configure an Ethernet connection, and write networking programs Create prototyping environments, use prototyping shields, and interface electronics to your Arduino
Download or read book The ARRL Operating Manual written by Robert Halprin and published by . This book was released on 1985 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electronics Pocket Reference written by Edward Pasahow and published by McGraw Hill Professional. This book was released on 2000 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handy, complete, and easily accessible, this compact, perfect-for-any-project guide provides a compendium of the latest data encompassing aspects of electronics, definitions, facts, formulas, and more. This third edition contains new sections on communications, computing electronics and networking, and active filters.
Download or read book Practical Antenna Handbook 5 e written by Joseph Carr and published by McGraw Hill Professional. This book was released on 2011-10-25 with total page 785 pages. Available in PDF, EPUB and Kindle. Book excerpt: THE DEFINITIVE ANTENNA REFERENCE--FULLY REVISED AND EXPANDED! Design and build your own antennas with the help of this unique guide. Updated and revised to provide clear answers to questions frequently asked by hobbyists and electronics technicians, Practical Antenna Handbook, Fifth Edition blends theoretical concepts with hands-on experience--requiring only high school mathematics Reorganized to flow logically from broad physical principles to specific antenna design and construction techniques, the book begins by covering the fundamentals. Then the half-wave dipole is discussed both as an excellent antenna in its own right and as a conceptual tool for predicting the performance of other designs. Transmission line impedance matching techniques--and a companion Smith chart tutorial--lead into "must have" accessories for tuning, monitoring, and troubleshooting antenna system performance. Other tools, such as antenna modeling software and network analyzer add-ons for PCs and Macs, are addressed, and concluding chapters offer fresh insights into support structures and installation techniques. NEW TOPICS COVERED INCLUDE: Characteristics of all-driven and parasitic arrays Beverages and small MF/HF receiving loops Top-loaded shunt-fed towers and other verticals Theory and design of Yagi beams Effect of real ground on propagation and antenna patterns, impedance, and efficiency Lightning protection and four kinds of ground systems Zoning and restrictive covenants COVERS A WIDE VARIETY OF ANTENNAS: Dipoles and inverted-Vs Quads, delta, and NVIS loops Wire arrays (bobtail curtain, half-square, rhombic) Verticals and shunt-fed towers Rotatable Yagi beams MF/HF receiving antennas (flag, pennant, K9AY, Beverage) Mobile and portable antennas VHF/UHF/microwave antennas And many more GO TO WWW.MHPROFESSIONAL.COM/CARR5 FOR: * Tables of worldwide geographic coordinates and antenna dimensions vs. frequency * Supplier updates * Author's blog * Additional photographs and schematics * Links to tutorials and specialized calculators
Download or read book Low Profile Amateur Radio written by Al Brogdon and published by American Radio Relay League (ARRL). This book was released on 2007-04 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Radios that Work for Free written by K. E. Edwards and published by Vita Publications. This book was released on 1977 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book RF Exposure and You written by Ed Hare and published by American Radio Relay League (ARRL). This book was released on 1998-01-01 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Meet the FCC RF exposure regulations! It's not complicated! Learn how to operate your station safely and legally using simple step-by-step ARRL worksheets and tables.
Download or read book The ARRL RFI Book written by Michelle Bloom and published by American Radio Relay League (ARRL). This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: For readers who have interference to their home electronics equipment from power lines, radio transmitters or other noise sources, this is the book for them. Written by a team of experts to help people find and use simple, practical solutions to interference problems, the book has clear step-by-step explanations that tell why it happens and what to do about it.
