Vhf Uhf Filters And Multicouplers
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Vhf Uhf Filters And Multicouplers
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Author : Bernard Piette
language : en
Publisher: John Wiley & Sons
Release Date : 2013-04-02
Vhf Uhf Filters And Multicouplers written by Bernard Piette and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-04-02 with Technology & Engineering categories.
This book describes the various devices used in radio communication and broadcasting to achieve high selectivity filtering and coupling. After providing background in the basics of microwave theory and more detailed material — including a special chapter on precision and errors in measurement - the reader will find detailed descriptions, manufacturing processes, and for the most useful instances a number of worked-through formulas, which will allow engineers and technicians to design circuits or components for filtering or coupling applications. Content is covered in this format across a broad range of fields including coaxial cavities, combline filters, bandpass and pass-reject duplexers, multicouplers, circulators, low-noise amplifiers, helix resonators, and much more.
Vhf Uhf Filters And Multicouplers
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Author : Bernard Piette
language : en
Publisher: Wiley-ISTE
Release Date : 2010-02-22
Vhf Uhf Filters And Multicouplers written by Bernard Piette and has been published by Wiley-ISTE this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-02-22 with Technology & Engineering categories.
This book describes the various devices used in radio communication and broadcasting to achieve high selectivity filtering and coupling. After providing background in the basics of microwave theory and more detailed material — including a special chapter on precision and errors in measurement - the reader will find detailed descriptions, manufacturing processes, and for the most useful instances a number of worked-through formulas, which will allow engineers and technicians to design circuits or components for filtering or coupling applications. Content is covered in this format across a broad range of fields including coaxial cavities, combline filters, bandpass and pass-reject duplexers, multicouplers, circulators, low-noise amplifiers, helix resonators, and much more.
Wideband Electronically Tunable Filters For Vhf Uhf Band
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Author : George H. THIESS
language : en
Publisher:
Release Date : 1965
Wideband Electronically Tunable Filters For Vhf Uhf Band written by George H. THIESS and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with categories.
Measurements of linewidth and Q have been made at frequencies from 90 Mc to 1000 Mc on 40 gallium substituted YIG resonators. Both spheres and discs were measured by a dynamic technique in which a resonator coupled energy between two coaxial lines. A complete description of the experimental setup is given and the data obtained is analyzed. The measured Q of gallium substituted YIG was found to be too low for practical filters at frequencies below 200 Mc at all temperatures from room temperature up to the curie temperature of the resonator. It is also predicted, from theoretical considerations, that at no other temperature higher than 10 K, is the Q likely to be any higher. It is recommended that further development of low magnetization materials be carried out, with the special aim of producing materials free of gradients and with low cutoff frequencies. The insertion loss of the UHF filter was typically 3 to 4 db across the 300 Mc to 1000 Mc band. The VHF filter was approximately 4 db except at 90 Mc where it rose to 11.5 db. It is concluded that YIG filters are probably not practical at frequencies below 200 Mc unless improved materials become available. (Author).
Low Loss Vhf And Uhf Filters For Wireless Communications Based On Piezoelectrically Transduced Micromechanical Resonators
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Author : Julio Mario Dewdney
language : en
Publisher:
Release Date : 2012
Low Loss Vhf And Uhf Filters For Wireless Communications Based On Piezoelectrically Transduced Micromechanical Resonators written by Julio Mario Dewdney and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
For the past decade, a great deal of research has been focused towards developing a viable on-chip solution to replace the current state-of-the-art VHF and UHF filters based on SAW and FBAR technologies. Although filters based on SAW and FBAR devices are capable of fulfilling the basic requirements needed for IF and RF bandpass filtering and reference signal generation, an alternative solution that can enable the next generation of multi-frequency and multi-mode transceivers while enabling size and price reduction by allowing the manufacturing of single-chip monolithic RF transceivers is highly desired. In response to these new needs, piezoelectrically-transduced micromechanical filters have emerged as a plausible alternative to outperform current dominant technologies in size, cost, and IC manufacturing compatibility without compromising device performance in terms of insertion loss, rejection, power handling and linearity. This dissertation presents the design, fabrication, characterization and experimental analysis of low-loss VHF and UHF filters for wireless communication applications, based on piezoelectrically-transduced micromechanical resonators. The resonators employed in this work for the implementation of microwave filters, resonate in contour-mode shapes, which differ from commercially available thickness-mode FBAR resonators, for which the thickness sets the resonance frequency. The employment of contour-mode designs facilitate simultaneous synthesis of multiple frequencies on the same substrate through CAD layout-defined lateral dimensions, thus avoiding the complexity demanded by FBAR devices for the precise control of the piezoelectric layer thickness.
Electronically Controlled Filters And Multicouplers
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Author : C. M. Morris
language : en
Publisher:
Release Date : 1974
Electronically Controlled Filters And Multicouplers written by C. M. Morris and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with categories.
This report covers the 2nd period of the program and describes the design, fabrication and test of 3 Electronically Tunable Filters. These filters cover the frequency range of 30-80 MHz at an RF power level of 25 watts. The primary application of the filter is to use at the output of an FM Radio to help reduce the transmitter noise floor. A description of the design requirements are given, a system description provided test data presented on the three filters, and recommendations for improvements in future models discussed. (Author).
Vhf Uhf Passive Filter Synthesis Based On Acoustic Resonator Structures
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Author : Melissa Sefton Dempsey
language : en
Publisher:
Release Date : 2009
Vhf Uhf Passive Filter Synthesis Based On Acoustic Resonator Structures written by Melissa Sefton Dempsey and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Acoustic surface wave devices categories.
"This thesis presents a novel design method for approximating standard bandpass filter transfer functions using surface acoustic wave (SAW) technology. This method is based on standard circuit simulation and optimization tools to generate physical specifications for the fabrication of a SAW impedance element filter (IEF) network. The IEF topology is verified in the design of a narrowband bandpass filter composed of commercial quartz SAW resonators. The utility of the design method is further demonstrated for a wider bandwidth filterbased on custom resonators fabricated on a lithium niobate substrate. An optimum fit was obtained between the standard filter target response and the corresponding SAW IEF response. Comparisons made between the two networks show that by exploiting the high Q characteristics of SAW devices in an IEF configuration, smaller footprints and tighter filter tolerances are obtained."--Abstract.
Fundamentals Of Electronics 1
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Author : Pierre Muret
language : en
Publisher: John Wiley & Sons
Release Date : 2017-08-09
Fundamentals Of Electronics 1 written by Pierre Muret and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-08-09 with Technology & Engineering categories.
Electronics has undergone important and rapid developments over the last 60 years, which have generated a large range of theoretical and practical notions. This book presents a comprehensive treatise of the evolution of electronics for the reader to grasp both fundamental concepts and the associated practical applications through examples and exercises. This first volume of the Fundamentals of Electronics series comprises four chapters devoted to elementary devices, i.e. diodes, bipolar junction transistors and related devices, field effect transistors and amplifiers, their electrical models and the basic functions they can achieve. Volumes to come will deal with systems in the continuous time regime, the various aspects of sampling signals and systems using analog (A) and digital (D) treatments, quantized level systems, as well as DA and AD converter principles and realizations.
Fundamentals Of Electronics 3
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Author : Pierre Muret
language : en
Publisher: John Wiley & Sons
Release Date : 2018-06-19
Fundamentals Of Electronics 3 written by Pierre Muret and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-06-19 with Technology & Engineering categories.
Over the last 60 years, electronics has undergone important and rapid developments. This has generated a large range of theoretical and practical notions. This book presents a comprehensive treatise on the evolution of electronics and allows the reader to grasp both the fundamental concepts and the associated practical applications through examples and exercises. Following on from Volume 1, which studied elementary devices, their electrical models and basic functions, Volume 2 was devoted to linear and stationary systems in the continuous-time regime. This third volume deals with the properties of discrete-time and quantized level systems over two chapters. The first presents an analysis of sampled signals and systems, with applications on switched capacitors circuits, analog and digital phase locked loops, frequency synthesis and filters characterized by either finite or infinite impulse response. Most tools are useful to elucidate the properties of both analog and digital systems. The second chapter focuses on the properties of analog-to-digital and digital-to-analog converters. Various principles that are used to perform these conversions are described. Finally, a large section is devoted to sigma-delta converters. Throughout this whole chapter, the signal-to-noise ratio, which is a central issue in these quantized level systems, is analyzed and discussed. Both chapters are followed by useful exercises which illustrate the general principles addressed. The exercises further build on the material covered in the chapters, particularly that which may not have been covered in detail.
Ultra Low Power Electronics And Adiabatic Solutions
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Author : Hervé Fanet
language : en
Publisher: John Wiley & Sons
Release Date : 2016-08-16
Ultra Low Power Electronics And Adiabatic Solutions written by Hervé Fanet and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-08-16 with Computers categories.
The improvement of energy efficiency in electronics and computing systems is currently central to information and communication technology design; low-cost cooling, autonomous portable systems and functioning on recovered energy all need to be continuously improved to allow modern technology to compute more while consuming less. This book presents the basic principles of the origins and limits of heat dissipation in electronic systems. Mechanisms of energy dissipation, the physical foundations for understanding CMOS components and sophisticated optimization techniques are explored in the first half of the book, before an introduction to reversible and quantum computing. Adiabatic computing and nano-relay technology are then explored as new solutions to achieving improvements in heat creation and energy consumption, particularly in renewed consideration of circuit architecture and component technology. Concepts inspired by recent research into energy efficiency are brought together in this book, providing an introduction to new approaches and technologies which are required to keep pace with the rapid evolution of electronics.
Neuro Inspired Information Processing
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Author : Alain Cappy
language : en
Publisher: John Wiley & Sons
Release Date : 2020-04-09
Neuro Inspired Information Processing written by Alain Cappy and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-04-09 with Technology & Engineering categories.
With the end of Moore's law and the emergence of new application needs such as those of the Internet of Things (IoT) or artificial intelligence (AI), neuro-inspired, or neuromorphic, information processing is attracting more and more attention from the scientific community. Its principle is to emulate in a simplified way the formidable machine to process information which is the brain, with neurons and artificial synapses organized in network. These networks can be software and therefore implemented in the form of a computer program but also hardware and produced by nanoelectronic circuits. The material path allows very low energy consumption, and the possibility of faithfully reproducing the shape and dynamics of the action potentials of living neurons (biomimetic approach) or even being up to a thousand times faster (high frequency approach). This path is promising and welcomed by the major manufacturers of nanoelectronics, as circuits can now today integrate several million neurons and artificial synapses.