Download or read book Doherty outphasing Power Amplifier Continuum Theory written by Chenyu Liang and published by . This book was released on 2020 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: A novel design theory for dual-input Doherty power amplifiers (PAs) is first presented in this dissertation, in which the auxiliary transistors do not fully turn off at backoff power. Given the input design variables selected by the PA designer, a Doherty load modulation scheme is exactly implemented at the current-source reference planes of the transistors by solving for the characteristic impedance of the Doherty quarter-wave transformer and the resistance of the common load. The Doherty output combiner at the package reference plane that sustains the desired dual-input DPA performance is then synthesized using nonlinear embedding technique and built with a lossless and reciprocal passive circuit. Then an analytic theory for dual-input outphasing power amplifiers that incorporates in one unified treatment the continuum of solutions for power combining including the Doherty and Chireix modes is presented. This unified theory developed at the current source reference planes reveals the performance trade-off achieved by all of the possible PA combiners within the continuum of solutions. Moreover, it identifies novel types of dual-input hybrid Chireix-Doherty (HCD) and hybrid Doherty-max (HDmax) PAs that combine key features of the Doherty and Chireix operations such that the fundamental drain voltages applied to both the main and auxiliary transistors remain constant versus output power levels. As a result, these two hybrid PA modes achieve the maximum flat efficiency response versus power, in contrast to the efficiency drop observed between backoff and peak in a conventional Doherty PA. Finally, a new type of wideband dual-input hybrid Doherty outphasing PA (HDO-PA) is developed in which the load-modulation continuously slides from the HDmax PA mentioned above to the conventional Doherty PA mode as the frequency increases. For a symmetric HDO-PA implementation, this corresponds to the peak-to-backoff fundamental voltage ratio of the auxiliary amplifier linearly varying from 9/7 to 2 with frequency. A transmission-line based wideband HDO-PA prototype is first established at the current source reference planes to cover the frequency band from 1.4-GHz to 2.5-GHz. The wideband HDO-PA is implemented next at the package reference planes by synthesizing the wideband combiner circuit required to sustain the intrinsic load-modulation behavior across the entire bandwidth. This wideband PA design methodology is developed by extending the Doherty-Chireix continuum theory, in such a fashion that the wide band PA performance is achieved by sliding the mode of operation versus the frequency with the Doherty-Chireix continuum.
Download or read book Bandwidth and Efficiency Enhancement in Radio Frequency Power Amplifiers for Wireless Transmitters written by Karun Rawat and published by Springer Nature. This book was released on 2020-03-05 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on broadband power amplifier design for wireless communication. Nonlinear model embedding is described as a powerful tool for designing broadband continuous Class-J and continuous class F power amplifiers. The authors also discuss various techniques for extending bandwidth of load modulation based power amplifiers, such as Doherty power amplifier and Chireix outphasing amplifiers. The book also covers recent trends on digital as well as analog techniques to enhance bandwidth and linearity in wireless transmitters. Presents latest trends in designing broadband power amplifiers; Covers latest techniques for using nonlinear model embedding in designing power amplifiers based on waveform engineering; Describes the latest techniques for extending bandwidth of load modulation based power amplifiers such as Doherty power amplifier and Chireix outphasing amplifiers; Includes coverage of hybrid analog/digital predistortion as wideband solution for wireless transmitters; Discusses recent trends on on-chip power amplifier design with GaN /GaAs MMICs for high frequency applications.
Download or read book Doherty Power Amplifiers written by Bumman Kim and published by Academic Press. This book was released on 2018-03-28 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Doherty Power Amplifiers: From Fundamentals to Advanced Design Methods is a great resource for both RF and microwave engineers and graduate students who want to understand and implement the technology into future base station and mobile handset systems. The book introduces the very basic operational principles of the Doherty Amplifier and its non-ideal behaviors. The different transconductance requirements for carrier and peaking amplifiers, reactive element effect, and knee voltage effect are described. In addition, several methods to correct imperfections are introduced, such as uneven input drive, gate bias adaptation, dual input drive and the offset line technique. Advanced design methods of Doherty Amplifiers are also explained, including multistage/multiway Doherty power amplifiers which can enhance the efficiency of the amplification of a highly-modulated signal. Other covered topics include signal tracking operation which increases the dynamic range, highly efficient saturated amplifiers, and broadband amplifiers, amongst other comprehensive, related topics. Specifically written on the Doherty Power Amplifier by the world’s leading expert, providing an in-depth presentation of principles and design techniques Includes detailed analysis on correcting non-ideal behaviors of Doherty Power Amplifiers Presents advanced Doherty Power Amplifier architectures
Download or read book Recent Technical Developments in Energy Efficient 5G Mobile Cells written by Raed A. Abd-Alhameed and published by MDPI. This book was released on 2020-06-17 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses the true innovation in engineering design that may be promoted by blending together models and methodologies from different disciplines, and, in this book, the target was exactly to follow this approach to deliver a new disruptive architecture to deliver these next-generation mobile small cell technologies. According to this design philosophy, the work within this book resides in the intersection of engineering paradigms that includes “cooperation”, “network coding”, and “smart energy-aware frontends”. These technologies will not only be considered as individual building blocks, but re-engineered according to an inter-design approach resulting in the enabler for energy efficient femtocell-like services on the move. The book aims to narrow the gap between the current networking technologies and the foreseen requirements that are targeted at the future development of the 5G mobile and wireless communications networks in terms of the higher networking capacity, the ability to support more users, the lower cost per bit, the enhanced energy efficiency, and adaptability to new services and devices (for example, smart cities, and the Internet of things (IoT)).
Download or read book The Doherty amplifier and beyond written by Luca Piazzon and published by Luca Piazzon. This book was released on 2011-04-11 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt: What's a Doherty power amplifier? What's the practical design flow to develop a DPA? May I estimate the achievable performance? May I get more efficiency, gain, back-off and frequencies from my DPA? Whether you have a FAQ or a rare question, inside you'll probably find the answer. This book is a real design manual, which can help the designer to identify, starting from the desired requirements, the best approach to use, simultaneously highlighting the advantages as well as disadvantages that occurs with its adoption.
Download or read book New Mixed mode Chireix Outphasing Theory and Frequency agile Clockwise loaded Class J Theory for High Efficiency Power Amplifiers written by Hsiu-Chen Chang and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new design methodology providing optimal mixed-mode operation for dual-input class-F outphasing Chireix amplifiers is presented. The design starts with single-transistor class-F simulations at the intrinsic I-V reference planes to directly select the optimal peak and backoff resistive loads Rmin and Rmax and input RF gate drives yielding the best combination of efficiencies and output powers without needing to perform a load pull simulation or measurement. New analytic equations expressed only in terms of Rmin and Rmax are given for designing the Chireix combiner at the current source reference planes. Nonlinear embedding is then used to predict the incident power and multi-harmonic source and load impedances required at the package reference planes to physically implement the power amplifier (PA). An analytic formula solely expressed in terms of Rmin and Rmax is reported for the peak and backoff outphasing angles required at the PA input reference planes. A Chireix outphasing PA designed with two 15-W GaN HEMTs exhibits a peak efficiency of 72.58% with peak power of 43.97 dBm and a 8-dB backoff efficiency of 75.22% at 1.9 GHz. Measurements with 10-MHz LTE signals with 9.6-dB PAPR yield 59.4% average drain efficiency at 1.9 GHz while satisfying the 3GPP linearity requirements. A novel frequency-agile PA designed with a modified class-J theory enforcing constant maximum and minimum instantaneous drain voltages for all frequencies is presented. The resulting high efficiency class-J mode which requires a reconfigurable drain supply exhibits clockwise fundamental and second harmonic load impedance trajectories versus frequency facilitating the PA design. This clockwise-loaded class-J (CLCJ) mode enables frequency-agile capability with enhanced efficiency when the proper drain supply voltage co-designed with the clockwise fundamental and harmonic loads is applied. A broadband power amplifier designed with a clockwise-loaded class-J theory is selected for demonstrating the broadband input second-harmonic injection with an embedded broadband diplexer. The CLCJ PA designed from 0.8 to 2.4 GHz exhibits measured drain efficiency in 57 - 78% and 61 - 86% ranges, when operated in low and high compression, respectively. To validate the frequency agility, 3G (3.84 MHz), 4G (20 MHz) and 5G (100 MHz) modulated signals were measured at different operating frequencies from 0.8 to 2.4 GHz. The drain efficiency enhancement for continuous-mode power amplifiers using broadband input second-harmonic injection is presented. A broadband power amplifier (1.3-2.4 GHz) designed with a clockwise-loaded class-J theory is selected for demonstrating the broadband input second-harmonic injection (2.6-4.8 GHz) with an embedded broadband diplexer. The drain efficiency enhancement increases by 9.4% in average within 1.3 - 2.4 GHz using CW signal. At 2 GHz, the average drain efficiency improved from 53% to 68% for CW signals and from 56.6% to 66.3% for a frequency-modulated 30 MHz chirp radar signal with second-harmonic injection.
Download or read book An Improved Outphasing Power Amplifier System for Wireless Communications written by Xuejun Zhang and published by . This book was released on 2001 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Theory and Design of Wideband Doherty Power Amplifiers written by and published by . This book was released on 2012 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Doherty Power Amplifier written by Paolo Colantonio and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Doherty Power Amplifier.
Download or read book RF Power Amplifiers for Wireless Communications written by Steve C. Cripps and published by Artech House Publishers. This book was released on 2006-01-01 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: This extensively revised edition offers a comprehensive, practical, up-to-date understanding of how to tackle a power amplifier design with confidence and quickly determine the cause of malfunctioning hardware.
Download or read book Electronics for Microwave Backhaul written by Vittorio Camarchia and published by Artech House. This book was released on 2016-03-31 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: This timely new resource presents an overview of the electronics of mobile network backhaul. Infrastructure planning, architecture evolution, digital controls, and countermeasures are all presented highlighting the building blocks of specific backhaul features. Tx and Rx design and antenna requirements and covered while examining the overall construction of the microwave radio hardware blocks. Single blocks are explored: the antenna, the analog transmitter and receiver, and the modem, recalling the most important aspects of transport networks and microwave link dimensioning. Essential theory is provided for each hardware block with an emphasis on present solutions. Authored by academic and industrial experts in the field, development and design engineers will benefit from the practical guidance in solving realistic issues and providing useful tips throughout the design process. This book guides readers through the historical evolution of microwave radios and the components of the next generation of mobile networks.
Download or read book Bandwidth and Efficiency Enhancement in Radio Frequency Power Amplifiers for Wireless Transmitters written by Karun Rawat and published by Springer. This book was released on 2021-03-06 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on broadband power amplifier design for wireless communication. Nonlinear model embedding is described as a powerful tool for designing broadband continuous Class-J and continuous class F power amplifiers. The authors also discuss various techniques for extending bandwidth of load modulation based power amplifiers, such as Doherty power amplifier and Chireix outphasing amplifiers. The book also covers recent trends on digital as well as analog techniques to enhance bandwidth and linearity in wireless transmitters. Presents latest trends in designing broadband power amplifiers; Covers latest techniques for using nonlinear model embedding in designing power amplifiers based on waveform engineering; Describes the latest techniques for extending bandwidth of load modulation based power amplifiers such as Doherty power amplifier and Chireix outphasing amplifiers; Includes coverage of hybrid analog/digital predistortion as wideband solution for wireless transmitters; Discusses recent trends on on-chip power amplifier design with GaN /GaAs MMICs for high frequency applications.
Download or read book Advanced Techniques in RF Power Amplifier Design written by Steve C. Cripps and published by Artech House. This book was released on 2002 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: This much-anticipated volume builds on the author's best selling and classic work, RF Power Amplifiers for Wireless Communications (Artech House, 1999), offering experienced engineers a more in-depth understanding of the theory and design of RF power amplifiers. An invaluable reference tool for RF, digital and system level designers, the book includes discussions on the most critical topics for professionals in the field, including envelope power management schemes and linearization.
Download or read book Microwave Electronics written by Giovanni Ghione and published by Cambridge University Press. This book was released on 2018 with total page 599 pages. Available in PDF, EPUB and Kindle. Book excerpt: A self-contained guide to microwave electronics, covering passive and active components, linear, low-noise and power amplifiers, microwave measurements, and CAD techniques. It is the ideal text for graduate and senior undergraduate students taking courses in microwave and radio-frequency electronics, as well as professional microwave engineers.
Download or read book The Design of CMOS Radio Frequency Integrated Circuits written by Thomas H. Lee and published by Cambridge University Press. This book was released on 2004 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book, first published in 2004, is an expanded and revised edition of Tom Lee's acclaimed RFIC text.
Download or read book Academic Press Library in Signal Processing Volume 7 written by and published by Academic Press. This book was released on 2017-12-01 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt: Academic Press Library in Signal Processing, Volume 7: Array, Radar and Communications Engineering is aimed at university researchers, post graduate students and R&D engineers in the industry, providing a tutorial-based, comprehensive review of key topics and technologies of research in Array and Radar Processing, Communications Engineering and Machine Learning. Users will find the book to be an invaluable starting point to their research and initiatives. With this reference, readers will quickly grasp an unfamiliar area of research, understand the underlying principles of a topic, learn how a topic relates to other areas, and learn of research issues yet to be resolved. Presents a quick tutorial of reviews of important and emerging topics of research Explores core principles, technologies, algorithms and applications Edited and contributed by international leading figures in the field Includes comprehensive references to journal articles and other literature upon which to build further, more detailed knowledge
Download or read book RF and Microwave Power Amplifier Design written by Andrei Grebennikov and published by McGraw Hill Professional. This book was released on 2004-09-15 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a rigorous tutorial on radio frequency and microwave power amplifier design, teaching the circuit design techniques that form the microelectronic backbones of modern wireless communications systems. Suitable for self-study, corporate training, or Senior/Graduate classroom use, the book combines analytical calculations and computer-aided design techniques to arm electronic engineers with every possible method to improve their designs and shorten their design time cycles.
