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Etude Et Utilisation Des Proprietes Des Materiaux Bips A Defaut Pour La Conception Dantennes
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Book Synopsis Etude et utilisation des propriétés des matériaux BIPs à défaut pour la conception d'antennes by : Cyril Cheype
Download or read book Etude et utilisation des propriétés des matériaux BIPs à défaut pour la conception d'antennes written by Cyril Cheype and published by . This book was released on 2001 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'étude des matériaux à Bande Interdite Photonique a pris, depuis quelques anées, un essor considérable. Les applications sont d'ailleurs très nombreuses que ce soit en optique ou en micro ondes, dans le domaine du filtrage ou des antennes. Ce mémoire présente une description des caractéristiques électromagnétiques des matériaux à Bande Interdite Photonique et plus particulièrement les propriétés des matériaux BIP à défaut. Il permet de mieux maîtriser l'évolution fréquentielle des pics de transmission situés dans la Bande Interdite du matériau en fonction de la nature et des dimensions de ce matériau. Les modes de défaut ainsi crées sont ensuite exploités afin de construire des antennes à résonateurs BIP. Leur principe de fonctionnement est le suivant : -Une structure BIP est excitée sur son mode de défaut. -La répartition géométrique de cet te structure interdit certaines fréquences et certaines directions de propagation
Book Synopsis Building Wireless Community Networks by : Rob Flickenger
Download or read book Building Wireless Community Networks written by Rob Flickenger and published by "O'Reilly Media, Inc.". This book was released on 2003 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Building Wireless Community Networks is about getting people online using wireless network technology. The 802.11b standard (also known as WiFi) makes it possible to network towns, schools, neighborhoods, small business, and almost any kind of organization. All that's required is a willingness to cooperate and share resources. The first edition of this book helped thousands of people engage in community networking activities. At the time, it was impossible to predict how quickly and thoroughly WiFi would penetrate the marketplace. Today, with WiFi-enabled computers almost as common as Ethernet, it makes even more sense to take the next step and network your community using nothing but freely available radio spectrum. This book has showed many people how to make their network available, even from the park bench, how to extend high-speed Internet access into the many areas not served by DSL and cable providers, and how to build working communities and a shared though intangible network. All that's required to create an access point for high-speed Internet connection is a gateway or base station. Once that is set up, any computer with a wireless card can log onto the network and share its resources. Rob Flickenger built such a network in northern California, and continues to participate in network-building efforts. His nuts-and-bolts guide covers: Selecting the appropriate equipment Finding antenna sites, and building and installing antennas Protecting your network from inappropriate access New network monitoring tools and techniques (new) Regulations affecting wireless deployment (new) IP network administration, including DNS and IP Tunneling (new) His expertise, as well as his sense of humor and enthusiasm for the topic, makes Building Wireless Community Networks a very useful and readable book for anyone interested in wireless connectivity.
Download or read book Wireless Hacks written by Rob Flickenger and published by "O'Reilly Media, Inc.". This book was released on 2003 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: Continuing with the successful Hack Series, this title provides real-world working examples of how to make useful things happen with wireless equipment.
