Download or read book Laser Source for UWB Pulse Generation written by David Lemus and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dans ce mémoire, nous analysons les critères qu'une source laser doit rencontrer pour être utilisée dans la génération d'impulsions UWB. L'écriture de la forme des impulsions est faite dans le domaine fréquentiel à l'aide de réseaux de Bragg (FBGs) et la conversion au domaine temporel se produit suite à la propagation à travers un milieu dispersif, dans ce cas une fibre monomode. Cette technique permet le contrôle précis de la forme des impulsions au détriment de la complexité et d'un coût élevé provenant du laser à fibre mode-locked. Dans ce mémoire, d'autres sources possibles basées principalement sur des lasers à semi-conducteurs sont examinées et analysées. La modulation directe de lasers à réflecteur distribué fournit des impulsions courtes mais il faut optimiser les conditions d'opération afin d'obtenir un spectre en fréquence étendu et assez uniforme. Cela constitue l'objectif principal de ce mémoire. Deux solutions ont été étudiées. D'abord, un laser à réflecteur distribué de 10 GHz de modulation dans un régime de commutation de gain (gain switched, GS-DFB) a été caractérisé en détail et son point d'opération a été optimisé afin de répondre aux exigences. La source puisée a été intégrée au sein de l'émetteur UWB et des impulsions UltraWideBand (UWB) à 1 GHz de taux de répétition ont été générées. La deuxième option est composée de deux lasers GS-DFB de 2.5 GHz de modulation. Les positions temporelles des impulsions générées par les deux lasers sont contrôlées pour réduire le bruit au détecteur et les réponses fréquentielles sont ajustées pour être adjacentes de telle façon que la bande passante totale utilisable s'en trouve doublée. Une façon simple de mesurer la phase d'impulsions optiques a été développée et vérifiée. Les impulsions de lasers GS-DFB présentent un glissement en fréquence principalement linéaire et elles peuvent être compressées de façon efficace. Cependant puisque la conversion fréquence-à-temps exige des impulsions fortement dispersées, la compression d'impulsion n'améliore pas la performance globale du système UWB et n'est donc pas nécessaire.

Download or read book Ultra Wideband Communications written by Mohammad Abdul Matin and published by BoD – Books on Demand. This book was released on 2011-08-09 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores both the state-of-the-art and the latest achievements in UWB antennas and propagation. It has taken a theoretical and experimental approach to some extent, which is more useful to the reader. The book highlights the unique design issues which put the reader in good pace to be able to understand more advanced research.

Download or read book Ultra Wideband Short Pulse Electromagnetics 2 written by L. Carin and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 591 pages. Available in PDF, EPUB and Kindle. Book excerpt: The papers published in this volume were presented at the Second International Conference on Ultra-WidebandiShort-Pulse (UWB/SP) Electromagnetics, ApriIS-7, 1994. To place this second international conference in proper perspective with respect to the first conference held during October 8-10, 1992, at Polytechnic University, some background information is necessary. As we had hoped, the first conference struck a responsive cord, both in timeliness and relevance, among the electromagnetic community 1. Participants at the first conference already inquired whether and when a follow-up meeting was under consideration. The first concrete proposal in this direction was made a few months after the first conference by Prof. A. Terzuoli of the Air Force Institute of Technology (AFIT), Dayton, Ohio, who has been a strong advocate of time-domain methods and technologies. He initially proposed a follow-up time-domain workshop under AFIT auspices. Realizing that interest in this subject is lodged also at other Air Force installations, we suggested to enlarge the scope, and received in this endeavor the support of Dr. A. Nachman of AFOSR (Air Force Office of Scientific Research), Bolling Air Force Base, Washington, D.C.

Download or read book Ultra Wideband Short Pulse Electromagnetics 3 written by Carl E. Baumann and published by Springer Science & Business Media. This book was released on 2013-04-17 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first two international conferences on Ultra-Wideband (UWB), Short-Pulse (SP) Electromagnetics were held at Polytechnic University, Brooklyn, New York in 1992 and 1994. Their purpose was to focus on advanced technologies for generating, radiating, and detecting UWB,SP signals, on mathematical methods, their propagation and scattering, and on current as well as potential future applications. The success of these two conferences led to the desirability of scheduling a third conference. Impetus was provided by the electromagnetics community and discussions led by Carl Baum and Larry Carin resulted in the suggestion that the UWB conferences be moved around, say to government laboratories such as Phillips Laboratory. Consequently the decision was made by the Permanent HPEM Committee to expand AMEREM '96 to include the Third Ultra-Wide Band, Short-Pulse (UWB,SP 3) with the Third Unexploded Ordnance Detec tion and Range Remediation Conference (UXO) and the HPEMINEM Conference in Albuquerque, New Mexico during the period May 27-31, 1996. Planning is now underway for EUROEM '98 in June, 1998 in Tel Aviv, Israel. Joseph Shiloh is the conference chairman. A fourth UWB,SP meeting is planned as a part of this conference and Ehud Heyman will coordinate this part of the meeting. The papers which appear in this volume, the third in the UWB,SP series, update subject areas from the earlier UWB,SP conferences. These topics include pulse generation and detection, antennas, pulse propagation, scattering theory, signal processing, broadband electronic systems, and buried targets.

Download or read book Ultra Wideband Short Pulse Electromagnetics 4 written by Joseph Shiloh and published by Springer Science & Business Media. This book was released on 1999-11-30 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: Generation of High-Power Subnanosecond Pulses.- Fundamental Physical Considerations for Ultrafast Spark Gap Switching.- Novel source of Powerful Subnanosecond Microwave Pulses Based on Superradiance.- Demonstration of Sub-Millimeter Radiation Generation from Static Field by a Superluminous Ionization front in Semiconductor Capacitor Array.- About Mechanism of Wideband Microwave Radiation at Explosion of Condensed High Explosives.- Calorimetric Spectrometer for Measuring Single Microwave Pulses in Relativistic Microwave Electronics Devices.- Universal Sensor Using Electro-Optic Sensing Principl.

Download or read book Ultrawideband Short Pulse Radio Systems written by Vladimir I. Koshelev and published by Artech House. This book was released on 2017-04-30 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt: This resource provides a comprehensive treatment of the methods, analysis, and practice of impulse and ultrawideband (UWB) systems. Sources, antennas, propagation, electromagnetic theory, and actual practical systems are explored.This book provides novel perspective on impulse and short-pulse wireless engineering along with practical guidance on how to build antennas and radio hardware for high-power impulse signals. Theoretical and experimental results in the time-frequency domain are presented. The book explains and discusses the scattering of UWB electromagnetic pulses by conducting and dielectric objects. Impulse responses of objects and propagation channels are explored with details of signal models and their spectral characteristics and uses of regularization of a Kramers-Kroning type relation for estimating transfer functions. Readers gain insight into the development of high-power sources of UWB radiation with megavolt effective potential on the base of combined antenna arrays excited with bipolar voltage pulses. This in-depth volume includes chapters on receiving antennas, transmitting antennas, and antenna arrays along with details on high-power UWB radiation sources as well as problem sets.

Download or read book Ultra Wideband written by Boris Lembrikov and published by BoD – Books on Demand. This book was released on 2010-09-17 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra wideband technology is one of the most promising directions in the rapidly developing modern communications. Ultra wideband communication system applications include radars, wireless personal area networks, sensor networks, imaging systems and high precision positioning systems. Ultra wideband transmission is characterized by high data rate, availability of low-cost transceivers, low transmit power and low interference. The proposed book consisting of 19 chapters presents both the state-of-the-art and the latest achievements in ultra wideband communication system performance, design and components. The book is addressed to engineers and researchers who are interested in the wide range of topics related to ultra wideband communications.

Download or read book Novel Optical Fiber Sensing Technology and Systems written by Mingjiang Zhang and published by Springer Nature. This book was released on 2024-01-03 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights recent advances in novel optical fiber sensing technology and systems, using distributed fiber sensing technology based on chaotic lasers. Upon introducing the basic theory of chaotic laser, a novel light source, the book summarizes new frontier technologies, and presents photonic integration and sensing applications. The book elaborates on new technologies of distributed optical fiber sensors and its engineering applications, as well as narrow-linewidth fiber laser for optical fiber sensing. This book is of great reference for researchers and professionals in the area of optics and optoelectronics.

Download or read book Introduction to Ultra Wideband Radar Systems written by James D. Taylor and published by CRC Press. This book was released on 2020-09-24 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt: This introductory reference covers the technology and concepts of ultra-wideband (UWB) radar systems. It provides up-to-date information for those who design, evaluate, analyze, or use UWB technology for any application. Since UWB technology is a developing field, the authors have stressed theory and hardware and have presented basic principles and concepts to help guide the design of UWB systems. Introduction to Ultra-Wideband Radar Systems is a comprehensive guide to the general features of UWB technology as well as a source for more detailed information.

Download or read book Microwave Photonics written by Jianping Yao and published by John Wiley & Sons. This book was released on 2024-03-26 with total page 501 pages. Available in PDF, EPUB and Kindle. Book excerpt: MICROWAVE PHOTONICS Overview of techniques in the field of microwave photonics, including recent developments in quantum microwave photonics and integrated microwave photonics Microwave Photonics offers a comprehensive overview of the microwave photonic techniques developed in the last 30 years, covering topics such as photonics generation of microwave signals, photonics processing of microwave signals, photonics distribution of microwave signals, photonic generation and distribution of UWB signals, photonics generation and processing of arbitrary microwave waveforms, photonic true time delay beamforming for phased array antennas, photonics-assisted instantaneous microwave frequency measurement, quantum microwave photonics, analog-to-digital conversion and more. The text is supported by a companion website for instructors, including learning objectives and questions/problems to further enhance student learning. Written by key researchers in the field, Microwave Photonics includes information on: Group-velocity dispersion and nonlinear effects in fibers, light coherence in light sources, phase and intensity modulators, photodetectors, and fiber Bragg gratings Injection locking, phase lock loops, external modulation, opto-electronic oscillators, and array waveguide gratings Photonic microwave delay-line filters with negative and complex coefficients and non-uniformly spaced photonic microwave delay-line filters Double- and single-sideband modulation, radio over fiber networks, and microwave photonics to coherent communication systems UWB generation, coding, and distribution over fiber, and instantaneous microwave frequency measurement via power monitoring True time delay beamforming Exploring the subject in depth, with expansive coverage of techniques developed in the last 30 years, Microwave Photonics is an essential reference for graduate students and researchers to learn microwave photonic technologies.

Download or read book Laser and Photonic Systems written by Shimon Y. Nof and published by CRC Press. This book was released on 2014-05-12 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: New, significant scientific discoveries in laser and photonic technologies, systems perspectives, and integrated design approaches can improve even further the impact in critical areas of challenge. Yet this knowledge is dispersed across several disciplines and research arenas. Laser and Photonic Systems: Design and Integration brings together a multidisciplinary group of experts to increase understanding of the ways in which systems perspectives may influence laser and photonic innovations and application integration. By bringing together chapters from leading scientists and technologists, industrial and systems engineers, and managers, the book stimulates new thinking that would bring a systems, network, and system-of-systems perspective to bear on laser and photonic systems applications. The chapters challenge you to explore opportunities for revolutionary and broader advancements. The authors emphasize the identification of emerging research and application frontiers where there are promising contributions to lasers, optics, and photonics applications in fields such as manufacturing, healthcare, security, and communications. The book contains insights from leading researchers, inventors, implementers, and innovators. It explains a variety of techniques, models, and technologies proven to work with laser and photonic systems, their development, design, and integration. Such systems are of growing interest to many organizations, given their promise and potential solutions of grand societal challenges. Lastly, the book helps you leverage the knowledge into exciting new frontiers of successful solutions.

Download or read book Futuristic Communication and Network Technologies written by N. Subhashini and published by Springer Nature. This book was released on 2023-06-22 with total page 505 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents select proceedings of the Virtual International Conference on Futuristic Communication and Network Technologies (VICFCNT 2021). It covers various domains in communication engineering and networking technologies. This volume comprises recent research in areas like cyber-physical systems, acoustics, speech & video signal Processing, and the Internet of Things. This book is a collated work of academicians, researchers, and industry personnel from the international arena. This book will be useful for researchers, professionals, and engineers working in the core areas of electronics and communication.

Download or read book Energy Storage written by Ahmed F. Zobaa and published by BoD – Books on Demand. This book was released on 2013-01-23 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: Besides new methods of generating energy, the storage of that energy is a highly important topic, with new technologies in great demand. This book offers readers a range of potential options, maximizing the possibility for success. Several chapters offer overviews of the future of such systems and estimations of their feasibility. Forms of energy storage covered include electrochemical, compressed air and flywheel systems. Other techniques addressed are the use of single- and double-switch cell voltage equalizers and hybrid energy storage and applications. Dynamic energy storage methods are also covered by two chapters. Finally, there are contributions on a low-voltage DC system with storage and distributed generation interfaced systems, and the in-situ dynamic characterization of energy storage and conversion systems.

Download or read book Microwave Photonics written by Chi H. Lee and published by CRC Press. This book was released on 2017-12-19 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microwave photonics continues to see rapid growth. The integration of optical fiber and wireless networks has become a commercial reality and is becoming increasingly pervasive. Such hybrid technology will lead to many innovative applications, including backhaul solutions for mobile networks and ultrabroadband wireless networks that can provide users with very high bandwidth services. Microwave Photonics, Second Edition systematically introduces important technologies and applications in this emerging field. It also reviews recent advances in micro- and millimeter-wavelength and terahertz-frequency systems. The book features contributions by leading international researchers, many of whom are pioneers in the field. They examine wave generation, measurement, detection, control, and propagation in detail, as well as the devices and components that enable ultrawide-band and ultrafast transmission, switching, and signal processing. These devices and components include optical-controlled microwave devices, optical transmitters, receivers, switching devices, detectors, and modulators. The book explores the theory, techniques, and technologies that are fueling applications such as radio-over-fiber, injection-locked semiconductor lasers, and terahertz photonics. Throughout, the contributors share insights on overcoming current limitations and on potential developments. What’s New in This Edition Two new chapters, on fiber Bragg gratings for microwave photonics applications and ultrawide-band sub-THz photonic wireless links Updates throughout, reflecting advances in the field New illustrations in each chapter Fully illustrated with more than 300 figures and tables, this book offers a detailed, wide-ranging overview of the current state and future directions of this burgeoning technology.

Download or read book Ultra Wideband Short Pulse Electromagnetics 7 written by Frank Sabath and published by Springer Science & Business Media. This book was released on 2010-05-30 with total page 864 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents selected contributions of the Ultra-Wideband Short-Pulse Electromagnetics 7 Conference, including electromagnetic theory, scattering, Ultrawideband (UWB) antennas, UWB systems, ground penetrating radar, UWB communications, pulsed-power generation, time-domain computational electromagnetics, UWB compatibility, target detection and discrimination, propagation through dispersive media, and wavelet and multi-resolution techniques.

Download or read book Ultrawideband Radar written by James D. Taylor and published by CRC Press. This book was released on 2017-12-19 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: Providing a practical review of the latest technology in the field, Ultrawideband Radar Applications and Design presents cutting-edge advances in theory, design, and practical applications of ultrawideband (UWB) radar. This book features contributions from an international team of experts to help readers learn about a wide range of UWB topics, including: History of the technology American and European governmental regulations and key definitions Nonsinusoidal wave propagation theory Random signal radar Object detection by ground permittivity measurements Large-target backscattering effects Medical applications Large current radiator antenna design Materials-penetrating theory Radar signal processing Weak-signal detection methods Holographic and real time radar imaging This book’s contributors use practical information to illustrate the latest theoretical developments and demonstrate UWB radar principles through case studies. Radar system engineers will find ideas for precision electronic sensing systems for use in medical, security, industrial, construction, and geophysical applications, as well as those used in archeological, forensic and transportation operations.

Download or read book Microwave Photonics Second Edition written by Chi H. Lee and published by CRC Press. This book was released on 2013-03-21 with total page 499 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microwave photonics continues to see rapid growth. The integration of optical fiber and wireless networks has become a commercial reality and is becoming increasingly pervasive. Such hybrid technology will lead to many innovative applications, including backhaul solutions for mobile networks and ultrabroadband wireless networks that can provide users with very high bandwidth services. Microwave Photonics, Second Edition systematically introduces important technologies and applications in this emerging field. It also reviews recent advances in micro- and millimeter-wavelength and terahertz-frequency systems. The book features contributions by leading international researchers, many of whom are pioneers in the field. They examine wave generation, measurement, detection, control, and propagation in detail, as well as the devices and components that enable ultrawide-band and ultrafast transmission, switching, and signal processing. These devices and components include optical-controlled microwave devices, optical transmitters, receivers, switching devices, detectors, and modulators. The book explores the theory, techniques, and technologies that are fueling applications such as radio-over-fiber, injection-locked semiconductor lasers, and terahertz photonics. Throughout, the contributors share insights on overcoming current limitations and on potential developments. What’s New in This Edition Two new chapters, on fiber Bragg gratings for microwave photonics applications and ultrawide-band sub-THz photonic wireless links Updates throughout, reflecting advances in the field New illustrations in each chapter Fully illustrated with more than 300 figures and tables, this book offers a detailed, wide-ranging overview of the current state and future directions of this burgeoning technology.