In diesem dringend notwendigen Referenzwerk untersuchen die Autoren, renommierte Experten des Fachgebiets, das Prinzip des Elektromagnetismus nach Maxwell und beschreiben die Eigenschaften einer Antenne im Frequenzbereich. Beleuchtet werden ebenfalls die Ausbreitungsverluste in Drahtlosnetzen sowie Ultrabreitband-Antennen und die Mechanismen der Breitbandubertragung von elektrischem Strom und Daten. Der Inhalt im UEberblick: - Eroertert die Schwachen von MIMO-System aus theoretischer und praktischer Sicht. - Zeigt, wie sich Basisstationsantennen so einsetzen lassen, dass sie effizienter arbeiten. - Validiert das Prinzip und die theoretische Analyse der elektromagnetischen Ausbreitung in der drahtlosen Kommunikation. - Zeigt Ergebnisse aus Experimenten, die in der Mathematik und Physik verankert sind.

This work presents important new insights into how various components and systems evolved. Premised on the idea that one cannot know a science without knowing its history, "History of Wireless" offers a lively new treatment that introduces previously unacknowledged pioneers and developments, setting a new standard for understanding the evolution of this important technology. Starting with the background - magnetism, electricity, light, and Maxwell's Electromagnetic Theory - this book offers new insights into the initial theory and experimental exploration of wireless. In addition to the well-known contributions of Maxwell, Hertz, and Marconi, it examines work done by Heaviside, Tesla, and passionate amateurs such as the Kentucky melon farmer Nathan Stubblefield and the unsung hero Antonio Meucci. Looking at the story from mathematical, physics, technical, and other perspectives, the clearly written text describes the development of wireless within a vivid scientific milieu. "History of Wireless" also goes into other key areas, including: The work of J. C. Bose and J. A. Fleming; German, Japanese, and Soviet contributions to physics and applications of electromagnetic oscillations and waves; Wireless telegraphic and telephonic development and attempts to achieve transatlantic wireless communications; Wireless telegraphy in South Africa in the early twentieth century; Antenna development in Japan: past and present; Soviet quasi-optics at near-mm and sub-mm wavelengths; The evolution of electromagnetic waveguides; and, The history of phased array antennas. Augmenting the typical, Marconi-centered approach, "History of Wireless" fills in the conventionally accepted story with attention to more specific, less-known discoveries and individuals, and challenges traditional assumptions about the origins and growth of wireless. This allows for a more comprehensive understanding of how various components and systems evolved. Written in a clear tone with a broad scientific audience in mind, this exciting and thorough treatment is sure to become a classic in the field.

A valuable addition to the Wiley Series in Microwave and Optical Engineering

Today’s modern wireless mobile communications depend on adaptive "smart" antennas to provide maximum range and clarity. With the recent explosive growth of wireless applications, smart antenna technology has achieved widespread commercial and military applications.

The only book available on the topic of adaptive antennas using digital technology, this text reflects the latest developments in smart antenna technology and offers timely information on fundamentals, as well as new adaptive techniques developed by the authors. Coupling electromagnetic aspects of antenna design with signal processing techniques designed to promote accurate and efficient information exchange, the text presents various mechanisms for characterizing signal-path loss associated with signal propagation, particularly for mobile wireless communications systems based on such techniques as joint space-frequency adaptive processing.

In clear, accessible language, the authors:

• explain the difference between adaptive antennas and adaptive signal processing
• Illustrate the procedures for adaptive processing using directive elements in a conformal array
• clarify multistage analysis procedure which combines electromagnetic analysis with signal processing
• present a survey of the various models for characterizing radio wave propagation in urban and rural environments
• describe a method wherein it is possible to identify and eliminate multipath without spatial diversity
• optimize the location of base stations in a complex environment

The text is an excellent resource for researchers and engineers working in electromagnetics and signal processing who deal with performance improvement of adaptive techniques, as well as those who are concerned with the characterization of propagation channels and applications of airborne phased arrays.

Analyzes wire scatterers and wire antennas operating in the transmitting and receiving modes.