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Author : Anyong Qing
Publisher : Springer Nature
Page : 283 pages
File Size : 51,5 Mb
Release : 2024-06-30
Category : Electronic
ISBN : 9789819989133
Author : Philippe Ferrari,Rolf Jakoby,Onur Hamza Karabey,Holger Maune,Gustavo P. Rehder
Publisher : Cambridge University Press
Page : 457 pages
File Size : 50,6 Mb
Release : 2022-05-26
Category : Technology & Engineering
ISBN : 9781107102477
Describes the theory, modeling, and design of tunable mm-wave circuits and systems using CMOS, RF MEMS, and microwave liquid crystals.
Author : Matthias Maasch
Publisher : Springer
Page : 138 pages
File Size : 45,6 Mb
Release : 2016-01-23
Category : Technology & Engineering
ISBN : 9783319281797
This book presents original findings on tunable microwave metamaterial structures, and describes the theoretical and practical issues involved in the design of metamaterial devices. Special emphasis is given to tunable elements and their advantages in terms of feeding network simplification. Different biasing schemes and feeding network topologies are presented, together with extensive prototype measurements and simulations. The book describes a novel, unique solution for beam steering and beam forming applications, and thus paves the way for the diffusion of new agile communication system components. At the same time, it provides readers with an outstanding and timely review of wave propagation in periodic structures, tunability of metamaterials and the technological constraints that need to be considered in the design of reconfigurable microwave components.
Author : Guillermo Carpintero,Enrique Garcia-Munoz,Hans Hartnagel,Sascha Preu,Antti Raisanen
Publisher : John Wiley & Sons
Page : 426 pages
File Size : 47,5 Mb
Release : 2015-09-28
Category : Technology & Engineering
ISBN : 9781118920428
Key advances in Semiconductor Terahertz (THz) Technology now promises important new applications enabling scientists and engineers to overcome the challenges of accessing the so-called "terahertz gap". This pioneering reference explains the fundamental methods and surveys innovative techniques in the generation, detection and processing of THz waves with solid-state devices, as well as illustrating their potential applications in security and telecommunications, among other fields. With contributions from leading experts, Semiconductor Terahertz Technology: Devices and Systems at Room Temperature Operation comprehensively and systematically covers semiconductor-based room temperature operating sources such as photomixers, THz antennas, radiation concepts and THz propagation as well as room-temperature operating THz detectors. The second part of the book focuses on applications such as the latest photonic and electronic THz systems as well as emerging THz technologies including: whispering gallery resonators, liquid crystals, metamaterials and graphene-based devices. This book will provide support for practicing researchers and professionals and will be an indispensable reference to graduate students in the field of THz technology. Key features: Includes crucial theoretical background sections to photomixers, photoconductive switches and electronic THz generation & detection. Provides an extensive overview of semiconductor-based THz sources and applications. Discusses vital technologies for affordable THz applications. Supports teaching and studying increasingly popular courses on semiconductor THz technology.
Author : Dongxing Wang
Publisher : CRC Press
Page : 808 pages
File Size : 50,7 Mb
Release : 2015-06-11
Category : Computers
ISBN : 9781315691039
The International Conference of Electronic Engineering and Information Science 2015 (ICEEIS 2015) was held on January 17-18, 2015, Harbin, China. This proceedings volume assembles papers from various researchers, engineers and educators engaged in the fields of electronic engineering and information science.The papers in this proceedings
Author : Mosa Ali Abu-Rgheff
Publisher : John Wiley & Sons
Page : 588 pages
File Size : 41,7 Mb
Release : 2019-11-04
Category : Technology & Engineering
ISBN : 9781119525516
Written in a clear and concise manner, this book presents readers with an in-depth discussion of the 5G technologies that will help move society beyond its current capabilities. It perfectly illustrates how the technology itself will benefit both individual consumers and industry as the world heads towards a more connected state of being. Every technological application presented is modeled in a schematic diagram and is considered in depth through mathematical analysis and performance assessment. Furthermore, published simulation data and measurements are checked. Each chapter of 5G Physical Layer Technologies contains texts, mathematical analysis, and applications supported by figures, graphs, data tables, appendices, and a list of up to date references, along with an executive summary of the key issues. Topics covered include: the evolution of wireless communications; full duplex communications and full dimension MIMO technologies; network virtualization and wireless energy harvesting; Internet of Things and smart cities; and millimeter wave massive MIMO technology. Additional chapters look at millimeter wave propagation losses caused by atmospheric gases, rain, snow, building materials and vegetation; wireless channel modeling and array mutual coupling; massive array configurations and 3D channel modeling; massive MIMO channel estimation schemes and channel reciprocity; 3D beamforming technologies; and linear precoding strategies for multiuser massive MIMO systems. Other features include: In depth coverage of a hot topic soon to become the backbone of IoT connecting devices, machines, and vehicles Addresses the need for green communications for the 21st century Provides a comprehensive support for the advanced mathematics exploited in the book by including appendices and worked examples Contributions from the EU research programmes, the International telecommunications companies, and the International standards institutions (ITU; 3GPP; ETSI) are covered in depth Includes numerous tables and illustrations to aid the reader Fills the gap in the current literature where technologies are not explained in depth or omitted altogether 5G Physical Layer Technologies is an essential resource for undergraduate and postgraduate courses on wireless communications and technology. It is also an excellent source of information for design engineers, research and development engineers, the private-public research community, university research academics, undergraduate and postgraduate students, technical managers, service providers, and all professionals involved in the communications and technology industry.
Author : Leszek R. Jaroszewicz,Noureddine Bennis
Publisher : MDPI
Page : 98 pages
File Size : 47,5 Mb
Release : 2020-01-03
Category : Science
ISBN : 9783039280568
The Special Issue “Liquid Crystal Optical Devices” discusses recent developments in the rapidly advancing subject of liquid crystals (LCs). The book is composed of several contributions from researchers in the field of liquid crystals that deal with the broadly with aspects of optical devices ranging from a theoretical viewpoints to practical implications of the properties of LCs. This is the first Special Issue devoted solely to recent advances in the rapidly expanding subject of LCs, a unique class of substances that combines both ordered structures with quasi-liquid-like properties. This Special Issue offers a broad perspective of the present state of the art in design and an up-to-date account of the most recent advances and progress in the field of LCs, providing thorough coverage of the demonstrated optical devices and the comprehensive analysis needed by professionals and engineers in the field of LC. The material is carefully structured, providing readers with a solid foundation of the principles, capabilities, use, and limitations of LC optical devices. In addition, this book covers the principles, recent advances and future developments of liquid crystal beam steering devices as well as recent advances in adaptive liquid crystal lenses.
Author : Igor V. Minin,Oleg V. Minin
Publisher : Springer Science & Business Media
Page : 212 pages
File Size : 47,9 Mb
Release : 2008-05-31
Category : Technology & Engineering
ISBN : 9783540795599
Antennas represent a critical technology in any of these wireless systems. Not only do they directly affect the received power of the system, they are also typically the largest and most visible part. Recently, the need for low-cost, low-profile, and lightweight antenna in the frequency range of the microwave/millimeter wave/THz band has regained momentum. "Basic Principles of Fresnel Antenna Arrays" provides us a with the basics of the various Fresnel Antenna approaches, in order to achieve low-cost, low-profile, and lightweight antenna in the microwave/millimeter wave band. A potential solution of the antenna problem lies in using lens technology in an array. The Fresnel zone plate lens (FZPL) antenna is in particular an interesting candidate for the array element. The limiting focusing properties of FZPL including subwave length focus are described in detail. The book further presents a novel hexagonal FZPL antenna which can be more effectively packed in an array due to its shape. Before considering the hexagonal FZPL antenna in an array, the authors investigate two ideas, described as methods to potentially improve the radiation characteristics. The first idea is to change the reference phase of the Fresnel zone radii - a novel free parameter in the usual design of zone plate’s lenses and antennas. To further improve the radiation characteristics of the hexagonal FZPL antenna, a technique involving Fresnel zone rotation is investigated. The book is of interest for designers of optical systems because, taking scaling effects into account, the characteristics of diffractive quasioptical elements are valid for diffractive focusing elements of integrated optics.
Author : Ci-Ling Pan,Jin-Wei Shi
Publisher : Wiley-IEEE Press
Page : 0 pages
File Size : 47,5 Mb
Release : 2020-07-20
Category : Technology & Engineering
ISBN : 111839819X
Introduces and reviews the generation, modulation, and applications of THz-radiation and millimeter waves Within the last 15 years or so, there has been an explosion in the number of people working in the field of THz-wave-related technologies. There is often a gap between how engineers and scientists approach such technologies, and this book bridges that gap by providing an essential reference to the wider technology and its applications. The book is divided into three major parts. The first part is the photonic generation of THz and MMW waves, which includes the homo-dyne photonic THz wave sources, pulse-shaped femtosecond light sources, design and realization of high-speed/power photonic transmitters (photomixer) or photoconductive switch for remote signal-generation. The second part covers the modulation and detection of THz (MMW) waves, which includes the bias modulation of photonic transmitter, photonic-crystal and liquid-crystal based THz wave modulator (phase shifter), THz time-domain spectroscopic (TDS) system, and diode-based fast THz power detector. The third part includes the applications of these THz photonic techniques, primarily focusing very-high data rate (Gbps) wireless communication. Photonics for THz and Millimeter Waves in Ultra-Fast Wireless Communication: Considers the applications of THz and MMW waves for next generation wireless communication, including airport security checks, bio imagery, radio astronomy, and fundamental science research Motivated by the development of communication and sensing applications in the millimeter-wave to THz segment Discusses new and emerging applications such as pulse-shaper combined with high-power photodiode for MMW signal generation, plus realization of high-power photonic transmitter with various PD techniques Provides an overview of the key technologies for THz and MMW waves, appealing to both students and experts in the technical sectors Essential reading for Postgraduate students and researchers in microwave engineering and optoelectronic device physics, as well as Engineers in the radio-over-fiber communication industry working on next generation photonics-based wireless communication.
Author : Josep Canet-Ferrer
Publisher : BoD – Books on Demand
Page : 204 pages
File Size : 46,7 Mb
Release : 2019-01-03
Category : Technology & Engineering
ISBN : 9781789848427
Metamaterials have provided applications in spectral ranges covering radio frequencies and ultraviolet. However, most applications have been extrapolated to the visible or near-infrared after being developed at the GHz level. This is due to technological reasons since fabrication of microwave antennas is not as demanding as THz resonators or plasmonic nanostructures. Accordingly, this book has been divided into three parts. In the first part, fundamentals of metamaterials and metadevices are discussed, while describing recent advances in the field. In the second part, the discussion is extended to the different spectral ranges focusing on the strategies for enabling the reconfigurability of metadevices. Given the increasing interest in THz applications, these can be found in the third part.
Author : Yifei Yuan,Yuhong Huang,Fa-Long Luo
Publisher : CRC Press
Page : 321 pages
File Size : 48,8 Mb
Release : 2024-04-24
Category : Technology & Engineering
ISBN : 9781003861591
This book provides a comprehensive coverage of reconfigurable intelligent surface (RIS) based wireless communications by covering all the technology stages from working principles, theories and algorithms, system architectures, real-world implementations, and programming platforms through performance measurements and system testing. Metasurfaces for Wireless Communications: Designs and Implementations serves as a must-be read for everything related to the use of RIS in wireless networks. Authored by three experts in the field, the book is organized into five in-depth and well-designed chapters. The first chapter discusses the fundamentals of metasurfaces for wireless communications as well as the related evolution and requirements of RIS in 6G. The second chapter is devoted to the modeling and analyses of RIS for wireless communications by including electromagnetic field modeling and theoretical analyses of both large- and small-scale channel models. In Chapter 3, the authors mainly address properties’ characterizations and system design of metasurface devices. Chapter 4 examines relay and system implementations of RIS for wireless communications through basic system models, key design aspects, and system simulations and architectures. Chapter 5 discusses the standardization of RIS-aided wireless communications by providing an overview of the relay technologies, field trials, and roadmaps in 3GPP standardizations. This book serves not only as a comprehensive reference for professional engineers, researchers, manufacturers, network operators, software developers, service providers, and regulatory bodies aiming at the development, standardization, deployment, and applications of B5G and 6G mobile communications, but also as a textbook for graduate students in circuits, signal processing, wireless communications, information theory, microwave technology, and antenna and propagation.
Author : Kai-Erik Peiponen,Axel Zeitler,Makoto Kuwata-Gonokami
Publisher : Springer
Page : 660 pages
File Size : 40,6 Mb
Release : 2012-10-04
Category : Science
ISBN : 9783642295645
This book presents the state-of-the-art of Terahertz spectroscopy. It is a modern source for a beginners and researcher interested in THz spectroscopy. The basics and physical background of THz spectroscopy and technology are explained, and important applications are described. The book presents the highlights of scientific research in the field of THz science and provides an excellent overview of the field and future directions of research. Over the last decade the field of terahertz spectroscopy has developed into one of the most rapidly growing fields of spectroscopy with large impact across a wide range of scientific disciplines. Due to substantial advances in femtosecond laser technology, terahertz time-domain spectroscopy (THz-TDS) has established itself as the dominant spectroscopic technique for experimental scientists interested in measurements in this frequency range. In solids and liquids terahertz radiation is at resonance with both phonon modes and hydrogen bonding modes which makes it an ideal tool to study the interaction between molecules in a unique way, thus opening a wealth of opportunities for research in physics, chemistry, biology, materials science and pharmaceuticals. This book provides an easy access to scientists, engineers and students alike who want to understand the theory and applications of modern terahertz spectroscopy.
Author : Takayoshi Kobayashi,Tadashi Okada,Tetsuro Kobayashi,Keith A. Nelson,Sandro de Silvestri
Publisher : Springer Science & Business Media
Page : 914 pages
File Size : 42,9 Mb
Release : 2005-12-28
Category : Science
ISBN : 9783540272137
This volume is a collection of papers presented at the Fourteenth International Conference on Ultrafast Phenomena held in Niigata, Japan from July 25-30, 2004. The Ultrafast Phenomena Conferences are held every two years and provide a forum for discussion of the latest results in ultrafast optics and their applications in science and engineering. A total of more than 300 papers were presented, reporting the forefront of research in ultrashort pulse generation and characterization, including new techniques for shortening the duration of laser pulses, for stabilizing their absolute phase, and for improving tenability over broad wavelength ranges, output powers and peak intensities. Ultrafast spectroscopies, particularly time-resolved X-ray and electron diffraction and two-dimensional spectroscopy, continue to give new insights into fundamental processes in physics, chemistry and biology. Control and optimization of the outcome of ultrafast processes represent another important field of research. There are an increasing number of applications of ultrafast methodology in material diagnostics and processing, microscopy and medical imaging. The enthusiasm of the participants, the involvement of many students, the high quality of the papers in both oral and poster sessions made the conference very successful. Many people and organizations made invaluable contributions. The members of the international program committee reviewed the submissions and organized the program. The staff of the Optical Society of America deserves special thanks for making the meeting arrangements and running the meeting smoothly.
Author : Anonim
Publisher : Unknown
Page : 256 pages
File Size : 52,9 Mb
Release : 2007
Category : Information display systems
ISBN : UOM:39015069203373
Author : Lu Yang
Publisher : Unknown
Page : 348 pages
File Size : 47,7 Mb
Release : 2007
Category : Electronic
ISBN : UCAL:X77557
