Doherty Power Amplifiers Book

Doherty Power Amplifiers


  • Author : Bumman Kim
  • Publisher : Academic Press
  • Release Date : 2018-03-28
  • Genre: Technology & Engineering
  • Pages : 184
  • ISBN 10 : 9780128098752

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Doherty Power Amplifiers 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

Switchmode RF and Microwave Power Amplifiers Book

Switchmode RF and Microwave Power Amplifiers


  • Author : Andrei Grebennikov
  • Publisher : Academic Press
  • Release Date : 2021-03-19
  • Genre: Technology & Engineering
  • Pages : 840
  • ISBN 10 : 9780128227541

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Switchmode RF and Microwave Power Amplifiers Excerpt :

Switchmode RF and Microwave Power Amplifiers, Third Edition is an essential reference book on developing RF and microwave switchmode power amplifiers. The book combines theoretical discussions with practical examples, allowing readers to design high-efficiency RF and microwave power amplifiers on different types of bipolar and field-effect transistors, design any type of high-efficiency switchmode power amplifiers operating in Class D or E at lower frequencies and in Class E or F and their subclasses at microwave frequencies with specified output power, also providing techniques on how to design multiband and broadband Doherty amplifiers using different bandwidth extension techniques and implementation technologies. This book provides the necessary information to understand the theory and practical implementation of load-network design techniques based on lumped and transmission-line elements. It brings a unique focus on switchmode RF and microwave power amplifiers that are widely used in cellular/wireless, satellite and radar communication systems which offer major power consumption savings. Provides a complete history of high-efficiency Class E and Class F techniques Presents a new chapter on Class E with shunt capacitance and shunt filter to simplify the design of high-efficiency power amplifier with broader frequency bandwidths Covers different Doherty architectures, including integrated and monolithic implementations, which are and will be, used in modern communication systems to save power consumption and to reduce size and costs Includes extended coverage of multiband and broadband Doherty amplifiers with different frequency ranges and output powers using different bandwidth extension techniques Balances theory with practical implementation, avoiding a cookbook approach and enabling engineers to develop better designs, including hybrid, integrated and monolithic implementations

High Efficiency RF and Microwave Solid State Power Amplifiers Book
Score: 1
From 1 Ratings

High Efficiency RF and Microwave Solid State Power Amplifiers


  • Author : Paolo Colantonio
  • Publisher : John Wiley & Sons
  • Release Date : 2009-07-08
  • Genre: Technology & Engineering
  • Pages : 514
  • ISBN 10 : 0470746556

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High Efficiency RF and Microwave Solid State Power Amplifiers Excerpt :

Do you want to know how to design high efficiency RF and microwave solid state power amplifiers? Read this book to learn the main concepts that are fundamental for optimum amplifier design. Practical design techniques are set out, stating the pros and cons for each method presented in this text. In addition to novel theoretical discussion and workable guidelines, you will find helpful running examples and case studies that demonstrate the key issues involved in power amplifier (PA) design flow. Highlights include: Clarification of topics which are often misunderstood and misused, such as bias classes and PA nomenclatures. The consideration of both hybrid and monolithic microwave integrated circuits (MMICs). Discussions of switch-mode and current-mode PA design approaches and an explanation of the differences. Coverage of the linearity issue in PA design at circuit level, with advice on low distortion power stages. Analysis of the hot topic of Doherty amplifier design, plus a description of advanced techniques based on multi-way and multi-stage architecture solutions. High Efficiency RF and Microwave Solid State Power Amplifiers is: an ideal tutorial for MSc and postgraduate students taking courses in microwave electronics and solid state circuit/device design; a useful reference text for practising electronic engineers and researchers in the field of PA design and microwave and RF engineering. With its unique unified vision of solid state amplifiers, you won’t find a more comprehensive publication on the topic.

Extended Bandwidth Doherty Power Amplifier for Carrier Aggregated Signals Book

Extended Bandwidth Doherty Power Amplifier for Carrier Aggregated Signals


  • Author : Mehdi Naseri Ali Abadi
  • Publisher : Unknown
  • Release Date : 2014
  • Genre: Uncategoriezed
  • Pages : 63
  • ISBN 10 : OCLC:906176071

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Extended Bandwidth Doherty Power Amplifier for Carrier Aggregated Signals Excerpt :

In the conventional classes of power amplifiers the efficiency drops at power back-off, whereas in order to maximize the spectral efficiency and data rate, wireless communication standards employ signals with high peak to average power ratio. This results in low average efficiency for power amplifiers, which in turn results in heavy cooling requirements and damage to the environment. To improve the low back-off efficiency Doherty technique has been widely investigated. But, the conventional Doherty power amplifiers are fairly narrowband, while modern transmitters are needed to support multiple standards and operate at multiple frequency bands. This thesis proposes two novel output combiners for Doherty power amplifiers with extended bandwidth. It will be shown analytically how the problem of wideband Doherty can be converted into an impedance synthesization problem. Then two networks to synthesize the desired impedance are proposed. To achieve the proper load modulation over a wide bandwidth, the first proposed combiner employs a quarter-wave short-circuited stub at the output of the peaking transistor and the second proposed combiner uses a parallel LC tank at the same node. In addition to inherent wideband characteristics, the proposed Doherty output combiners have three other important benefits. First, they present small low-frequency impedance for both the main and peaking transistors, which results in improved linearity and linearizability when the amplifier is concurrently driven with multi-band modulated signals. Second, the new combiners result in smaller group delay variation across the band compared to the conventional Doherty amplifier, which results in improved linearizability when the amplifier is driven with extra wideband modulated signals. Finally, the output capacitance of the peaking transistor can be easily absorbed into the combiners without compromising the performance of the amplifier. The thesis starts with an overview of the Doherty power amp

RF and Microwave Power Amplifier Design Book

RF and Microwave Power Amplifier Design


  • Author : Andrei Grebennikov
  • Publisher : McGraw Hill Professional
  • Release Date : 2004-09-15
  • Genre: Technology & Engineering
  • Pages : 420
  • ISBN 10 : 9780071782999

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RF and Microwave Power Amplifier Design 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.

RF CMOS Power Amplifiers  Theory  Design and Implementation Book

RF CMOS Power Amplifiers Theory Design and Implementation


  • Author : Mona M. Hella
  • Publisher : Springer Science & Business Media
  • Release Date : 2006-04-18
  • Genre: Technology & Engineering
  • Pages : 94
  • ISBN 10 : 9780306473203

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RF CMOS Power Amplifiers Theory Design and Implementation Excerpt :

RF CMOS Power Amplifiers: Theory Design and Implementation focuses on the design procedure and the testing issues of CMOS RF power amplifiers. This is the first monograph addressing RF CMOS power amplifier design for emerging wireless standards. The focus on power amplifiers for short is distance wireless personal and local area networks (PAN and LAN), however the design techniques are also applicable to emerging wide area networks (WAN) infrastructure using micro or pico cell networks. The book discusses CMOS power amplifier design principles and theory and describes the architectures and tardeoffs in designing linear and nonlinear power amplifiers. It then details design examples of RF CMOS power amplifiers for short distance wireless applications (e, g., Bluetooth, WLAN) including designs for multi-standard platforms. Design aspects of RF circuits in deep submicron CMOS are also discussed. RF CMOS Power Amplifiers: Theory Design and Implementation serves as a reference for RF IC design engineers and RD and R&D managers in industry, and for graduate students conducting research in wireless semiconductor IC design in general and with CMOS technology in particular.

Advanced Techniques in RF Power Amplifier Design Book
Score: 4.5
From 2 Ratings

Advanced Techniques in RF Power Amplifier Design


  • Author : Steve C. Cripps
  • Publisher : Artech House
  • Release Date : 2002
  • Genre: Technology & Engineering
  • Pages : 338
  • ISBN 10 : 158053564X

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Advanced Techniques in RF Power Amplifier Design 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.

Bandwidth and Efficiency Enhancement in Radio Frequency Power Amplifiers for Wireless Transmitters Book

Bandwidth and Efficiency Enhancement in Radio Frequency Power Amplifiers for Wireless Transmitters


  • Author : Karun Rawat
  • Publisher : Springer Nature
  • Release Date : 2020-03-05
  • Genre: Technology & Engineering
  • Pages : 390
  • ISBN 10 : 9783030388669

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Bandwidth and Efficiency Enhancement in Radio Frequency Power Amplifiers for Wireless Transmitters 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.

High Efficiency Load Modulation Power Amplifiers for Wireless Communications Book

High Efficiency Load Modulation Power Amplifiers for Wireless Communications


  • Author : Zhancang Wang
  • Publisher : Artech House
  • Release Date : 2017-06-30
  • Genre: Technology & Engineering
  • Pages : 414
  • ISBN 10 : 9781630814670

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High Efficiency Load Modulation Power Amplifiers for Wireless Communications Excerpt :

This cutting-edge resource presents a complete and systematic overview of the practical design considerations of radio frequency (RF) high efficiency load modulation power amplifiers (PA) for modern wireless communications for 4G and beyond. It provides comprehensive insight into all aspects of load modulation PA design and optimization not only covering design approaches specifically for passive and active load modulation operation but also hybrid with dynamic supply modulation and digital signal processing algorithms required for performance enhancement. Passive load impedance tuner design, dynamic load modulation PA, active load modulation PA and Doherty PA design for efficiently enhancement are explained. Readers find practical guidance into load modulation PA design for bandwidth extension, including video bandwidth enhancement techniques, broadband dynamic load amplifiers, topology selection, design procedures, and network output. This book presents the evolution and integration of classical load modulation PA topologies in order to meet new challenges in the field.

A Base Control Doherty Power Amplifier Design for Improved Efficiency in GSM Handsets Book

A Base Control Doherty Power Amplifier Design for Improved Efficiency in GSM Handsets


  • Author : Darren W. Ferwalt
  • Publisher : Unknown
  • Release Date : 2003
  • Genre: Electric power supplies to apparatus
  • Pages : 150
  • ISBN 10 : OCLC:57552530

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A Base Control Doherty Power Amplifier Design for Improved Efficiency in GSM Handsets Excerpt :

In cellular telephones, RF power amplifiers consume a significant part of the total phone current. Reducing the average PA current will extend battery life. In GSM systems the handset is commanded by the base station to transmit at power levels lower than full power much of the time. A Doherty amplifier can be used to improve efficiency at these lower power levels, providing a lower average PA current when evaluated over the entire power range. A Doherty amplifier is presented that uses the DC base voltage to control the output power. The base control amplifier is first studied separately, then two such amplifiers are combined to create a Doherty amplifier. An analysis of battery life while the phone is on a call, or talk time, is then performed. Talk time for the base control Doherty amplifier is compared to an ideal class B amplifier and to a Doherty amplifier composed of two class B amplifiers. Finally a base control Doherty amplifier is implemented at 30 MHz, both in simulation and hardware.

Advanced Microwave Circuits and Systems Book

Advanced Microwave Circuits and Systems


  • Author : Vitaliy Zhurbenko
  • Publisher : BoD – Books on Demand
  • Release Date : 2010-04-01
  • Genre: Technology & Engineering
  • Pages : 500
  • ISBN 10 : 9789533070872

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Advanced Microwave Circuits and Systems Excerpt :

This book is based on recent research work conducted by the authors dealing with the design and development of active and passive microwave components, integrated circuits and systems. It is divided into seven parts. In the first part comprising the first two chapters, alternative concepts and equations for multiport network analysis and characterization are provided. A thru-only de-embedding technique for accurate on-wafer characterization is introduced. The second part of the book corresponds to the analysis and design of ultra-wideband low- noise amplifiers (LNA).

Switchmode RF Power Amplifiers Book

Switchmode RF Power Amplifiers


  • Author : Andrei Grebennikov
  • Publisher : Newnes
  • Release Date : 2011-04-01
  • Genre: Technology & Engineering
  • Pages : 448
  • ISBN 10 : 0080550649

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Switchmode RF Power Amplifiers Excerpt :

A majority of people now have a digital mobile device whether it be a cell phone, laptop, or blackberry. Now that we have the mobility we want it to be more versatile and dependable; RF power amplifiers accomplish just that. These amplifiers take a small input and make it stronger and larger creating a wider area of use with a more robust signal. Switching mode RF amplifiers have been theoretically possible for decades, but were largely impractical because they distort analog signals until they are unrecognizable. However, distortion is not an issue with digital signals—like those used by WLANs and digital cell phones—and switching mode RF amplifiers have become a hot area of RF/wireless design. This book explores both the theory behind switching mode RF amplifiers and design techniques for them. *Provides essential design and implementation techniques for use in cma2000, WiMAX, and other digital mobile standards *Both authors have written several articles on the topic and are well known in the industry *Includes specific design equations to greatly simplify the design of switchmode amplifiers

On the Design of High efficiency RF Doherty Power Amplifiers Book

On the Design of High efficiency RF Doherty Power Amplifiers


  • Author : Mehran Yahyavi
  • Publisher : Unknown
  • Release Date : 2016
  • Genre: Uncategoriezed
  • Pages : 135
  • ISBN 10 : OCLC:1120575155

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On the Design of High efficiency RF Doherty Power Amplifiers Excerpt :

Power amplifiers (PAs) are one of the most crucial elements in wireless standards becasue they are the most power hungry subsystems. These elements have to face an important issue, which is the power efficiency, a fact related with the output back-off (OBO). But the OBO depends on the kind of modulated signal, in proportion to the modulated signal peak-to-average power ratio (PAPR). The higuer is the data rate, the higer is the OBO, and consequently the lower is the efficiency. A low efficiency of PAs causes the waste of energy as heat. Furthermore, the trade-off between linearity and efficiency in PAs is another major issue. To cope with the undesired circumstances producing efficiency degradation, the Doherty power amplifier (DPA) is one of the useful techniques which provide high efficiency for high PAPR of modern communication signals. Nevertheless, the limited bandwidth (BW) of this kind of PAs (about 10% of fractional bandwidth) and its importance (in modern wireless systems such as LTE, WiMAX, Wi-Fi and satellite systems) have encouraged the researchers to improve this drawback in recent years. Some typical BW limiting factors effect on the performance of DPAs: i) quarter-wave length transformers, ii) phase compensation networks in/output matching circuits, iii) offset lines and device non-idealities; The quarter-wave length transformers performs as an inverter impedance in the load modulation technique of DPAs. The future objective in designing DPAs is to decrease the impact of these issues. In this context, this PhD-thesis is focused on improving fractional bandwidth of DPAs using the new methods that are related to impedance transformers instead of impedance inverters in the load modulation technique. This study is twofold. First, it is presented a novel DPA where a wideband GaN DPA in the 2.5 GHz band with an asymmetrical Wilkinson splitter. The impedance transformer of the proposed architecture is based on a matching network including a tapered line with

RF Power Amplifiers for Wireless Communications Book
Score: 5
From 1 Ratings

RF Power Amplifiers for Wireless Communications


  • Author : Steve C. Cripps
  • Publisher : Artech House Publishers
  • Release Date : 2006-01-01
  • Genre: Technology & Engineering
  • Pages : 456
  • ISBN 10 : 1596930187

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RF Power Amplifiers for Wireless Communications 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.