Linearization Of Rf Power Amplifiers Using Cartesian Feedback
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Linearization Of Rf Power Amplifiers Using Cartesian Feedback
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Author :
language : en
Publisher:
Release Date : 1991
Linearization Of Rf Power Amplifiers Using Cartesian Feedback written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with categories.
Feedback Linearization Of Rf Power Amplifiers
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Author : J.L. Dawson
language : en
Publisher: Springer Science & Business Media
Release Date : 2004-06-08
Feedback Linearization Of Rf Power Amplifiers written by J.L. Dawson and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004-06-08 with Technology & Engineering categories.
Improving the performance of the power amplifier is the most pressing problem facing designers of modern radio-frequency (RF) transceivers. Linearity and power efficiency of the transmit path are of utmost importance, and the power amplifier has proven to be the bottleneck for both. High linearity enables transmission at the highest data rates for a given channel bandwidth, and power efficiency prolongs battery lifetime in portable units and reduces heat dissipation in high-power transmitters. Cartesian feedback is a power amplifier linearization technique that acts to soften the tradeoff between power efficiency and linearity in power amplifiers. Despite its compelling, fundamental advantages, the technique has not enjoyed widespread acceptance because of certain implementation difficulties. Feedback Linearization of RF Power Amplifiers introduces new techniques for overcoming the challenges faced by the designer of a Cartesian feedback system. The theory of the new techniques are described and analyzed in detail. The book culminates with the results of the first known fully integrated Cartesian feedback power amplifier system, whose design was enabled by the techniques described. Feedback Linearization of RF Power Amplifiers is a valuable reference work for engineers in the telecommunications industry, industry researchers, academic researchers.
Feedback Linearization Of Rf Power Amplifiers
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Author : J.L. Dawson
language : en
Publisher: Springer Science & Business Media
Release Date : 2007-05-08
Feedback Linearization Of Rf Power Amplifiers written by J.L. Dawson and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-05-08 with Technology & Engineering categories.
Improving the performance of the power amplifier is the most pressing problem facing designers of modern radio-frequency (RF) transceivers. Linearity and power efficiency of the transmit path are of utmost importance, and the power amplifier has proven to be the bottleneck for both. High linearity enables transmission at the highest data rates for a given channel bandwidth, and power efficiency prolongs battery lifetime in portable units and reduces heat dissipation in high-power transmitters. Cartesian feedback is a power amplifier linearization technique that acts to soften the tradeoff between power efficiency and linearity in power amplifiers. Despite its compelling, fundamental advantages, the technique has not enjoyed widespread acceptance because of certain implementation difficulties. Feedback Linearization of RF Power Amplifiers introduces new techniques for overcoming the challenges faced by the designer of a Cartesian feedback system. The theory of the new techniques are described and analyzed in detail. The book culminates with the results of the first known fully integrated Cartesian feedback power amplifier system, whose design was enabled by the techniques described. Feedback Linearization of RF Power Amplifiers is a valuable reference work for engineers in the telecommunications industry, industry researchers, academic researchers.
Linearization And Efficiency Enhancement Techniques For Silicon Power Amplifiers
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Author : Eric Kerhervé
language : en
Publisher: Elsevier
Release Date : 2015-01-07
Linearization And Efficiency Enhancement Techniques For Silicon Power Amplifiers written by Eric Kerhervé and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-01-07 with Technology & Engineering categories.
This book provides an overview of current efficiency enhancement and linearization techniques for silicon power amplifier designs. It examines the latest state of the art technologies and design techniques to address challenges for RF cellular mobile, base stations, and RF and mmW WLAN applications. Coverage includes material on current silicon (CMOS, SiGe) RF and mmW power amplifier designs, focusing on advantages and disadvantages compared with traditional GaAs implementations. With this book you will learn: - The principles of linearization and efficiency improvement techniques - The architectures allowing the optimum design of multimode Si RF and mmW power amplifiers - How to make designs more efficient by employing new design techniques such as linearization and efficiency improvement - Layout considerations - Examples of schematic, layout, simulation and measurement results - Addresses the problems of high power generation, faithful construction of non-constant envelope constellations, and efficient and well control power radiation from integrated silicon chips - Demonstrates how silicon technology can solve problems and trade-offs of power amplifier design, including price, size, complexity and efficiency - Written and edited by the top contributors to the field
Cartesian Feedback Control For Mri Transmitter Array Systems
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Author : Marta Gaia Zanchi
language : en
Publisher: Stanford University
Release Date : 2010
Cartesian Feedback Control For Mri Transmitter Array Systems written by Marta Gaia Zanchi and has been published by Stanford University this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
Accurate control of the radio-frequency (RF) electromagnetic fields in Magnetic Resonance Imaging (MRI) is necessary to ensure patient safety and provide high-quality diagnostic capabilities. Precise control is however becoming increasingly difficult to achieve, given the recent trends toward high fields and transmitter array systems. At high fields, imaging is performed in a frequency regime where the wavelength is on the order of, or smaller than, the dimensions of the human body. This leads to prominent wave behavior, non-uniform field patterns, and increased power deposition. Multi-element transmitter array systems with independent phase and amplitude control of their elements support methods that can mitigate these problems. However, in turn, they demand high fidelity RF reproduction and may lead to undesired electromagnetic interactions between elements of the arrays and with interventional devices. Frequency-offset Cartesian feedback can be used to address all of these issues. In combination with the use of polyphase error amplifiers (to implement a low-IF control bandwidth), Cartesian feedback can be used with MRI power amplifiers and transmit coils to increase the fidelity of RF reproduction, without the in-bandwidth DC-offsets and quadrature mismatches that may lead to imaging artifacts such as bright spots and ghosting. In addition, the control system, which includes autotuning circuitry for stability and vector multipliers circuitry for feedback manipulation, can be used to tune the series output impedance of these amplifiers, thereby reducing the likelihood of interactions between elements of transmit array systems. Furthermore, a miniaturized variation of the control system (called Active Cable Trap) can be used on guidewires to suppress undesired currents elicited by coupling with the RF fields of the transmit coils. In an era of rapid progress in high field MRI for clinical applications, the frequency offset Cartesian feedback method and system thus promises to address many of the challenges faced by designers of multi-element transmitter array systems.
Behavioral Modeling And Linearization Of Rf Power Amplifiers
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Author : John Wood
language : en
Publisher: Artech House
Release Date : 2014-06-01
Behavioral Modeling And Linearization Of Rf Power Amplifiers written by John Wood and has been published by Artech House this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-06-01 with Technology & Engineering categories.
Wireless voice and data communications have made great improvements, with connectivity now virtually ubiquitous. Users are demanding essentially perfect transmission and reception of voice and data. The infrastructure that supports this wide connectivity and nearly error-free delivery of information is complex, costly, and continually being improved. This resource describes the mathematical methods and practical implementations of linearization techniques for RF power amplifiers for mobile communications. This includes a review of RF power amplifier design for high efficiency operation. Readers are also provided with mathematical approaches to modeling nonlinear dynamical systems, which can be applied in the context of modeling the PA for identification in a pre-distortion system. This book also describes typical approaches to linearization and digital pre-distortion that are used in practice.
Bulletin Of Electrical Engineering And Informatics
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Author : Tole Sutikno
language : en
Publisher: Universitas Ahmad Dahlan
Release Date :
Bulletin Of Electrical Engineering And Informatics written by Tole Sutikno and has been published by Universitas Ahmad Dahlan this book supported file pdf, txt, epub, kindle and other format this book has been release on with Technology & Engineering categories.
Bulletin of Electrical Engineering and Informatics is a peer-reviewed journal that publishes material on all aspects of electrical, electronics, instrumentation, control, telecommunication, computer engineering, information technology and informatics from the global world.
Multi Mode Multi Band Rf Transceivers For Wireless Communications
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Author : Gernot Hueber
language : en
Publisher: John Wiley & Sons
Release Date : 2011-02-22
Multi Mode Multi Band Rf Transceivers For Wireless Communications written by Gernot Hueber 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 2011-02-22 with Technology & Engineering categories.
Summarizes cutting-edge physical layer technologies for multi-mode wireless RF transceivers. Includes original contributions from distinguished researchers and professionals. Covers cutting-edge physical layer technologies for multi-mode wireless RF transceivers. Contributors are all leading researchers and professionals in this field.
Design Of Linear Rf Outphasing Power Amplifiers
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Author : Xuejun Zhang
language : en
Publisher: Artech House
Release Date : 2003
Design Of Linear Rf Outphasing Power Amplifiers written by Xuejun Zhang and has been published by Artech House this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Technology & Engineering categories.
Describes the outphasing approach to amplifier linearization that uses power-combining techniques to create a linear output waveform from two nonlinear input sources, and presents recent advances in resolving the limitations caused by the strict matching requirements between the two amplifiers and the microwave power wasted in the power-combing network. The authors discuss the linearity performance of outphasing amplifier systems, correction schemes based on training vectors, and power recycling in outphasing amplifiers. Zhang is an engineer with Qualcomm, while Larson and Asbeck are affiliated with the University of California, San Diego. Annotation (c)2003 Book News, Inc., Portland, OR (booknews.com).
Distortion In Rf Power Amplifiers
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Author : Joel Vuolevi
language : en
Publisher: Artech House
Release Date : 2003
Distortion In Rf Power Amplifiers written by Joel Vuolevi and has been published by Artech House this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Technology & Engineering categories.
Here is a thorough treatment of distortion in RF power amplifiers. This unique resource offers expert guidance in designing easily linearizable systems that have low memory effects. It offers you a detailed understanding of how the matching impedances of a power amplifier and other RF circuits can be tuned to minimize overall distortion. What's more, you see how to build models that can be used for distortion simulations.