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Techniques For Efficient Radio Frequency Power Conversion
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Book Synopsis Techniques for Efficient Radio Frequency Power Conversion by : Alexander S. Jurkov
Download or read book Techniques for Efficient Radio Frequency Power Conversion written by Alexander S. Jurkov and published by . This book was released on 2019 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: A diverse range of radio-frequency (RF) power applications demand RF power generation systems that allow for dynamic output power control while having the capability to efficiently deliver power into a varying load. While some of these existing and emerging applications are characterized with narrowband or single-frequency operation, others require operation over a range of frequencies. In such applications, the system architecture typically comprises an RF power amplifier (PA) or inverter along with a tunable impedance matching network (TMN). Electronically-controlled TMNs offer substantial benefits when it comes to the implementability of such highly reconfigurable and adaptive RF systems as they allow for proper impedance termination of the PA or inverter over the operating load and frequency range. This work explores the design of TMNs based on a solid-state technique that allows for faster and more accurate impedance matching compared to traditional approaches. The performance and design of such TMNs is demonstrated for plasma driving applications at 13.56 MHz. In addition, this work proposes techniques for designing switched-mode RF inverters that can operate efficiently over a wide load impedance range. These techniques are applied to the design of class E and class [Phi]2 inverter prototypes at 27.12 MHz, and their ability to handle large load modulation while maintaining high operating efficiency is demonstrated. The techniques presented in this work can be further applied to the integration of an RF power amplifier/inverter and a TMN into a single multi-transistor architecture capable of efficiently operating across frequency and load variation while providing dynamic output power control.
Book Synopsis Techniques for Efficient Wide-range Radio-frequency Power Generation System by : Haoquan Zhang (Electrical and computer science engineer)
Download or read book Techniques for Efficient Wide-range Radio-frequency Power Generation System written by Haoquan Zhang (Electrical and computer science engineer) and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Industrial radio-frequency (rf) power applications, e.g. plasma generation for semiconductor processing, are often characterized by the delivery of rf power, at a specific frequency or within a narrow band, with high peak power levels and wide overall power ranges, into loads with varying impedances. To meet the evolving demands in the industry, typical goals for the power generation system include operation over a wide load impedance range and wide output power range, while exhibiting very fast dynamic responses and maintaining high peak and average efficiencies. However, meeting all of these metrics simultaneously has not been possible to date, and efficiency is often sacrificed in order to meet the other requirements, yielding solutions with high electricity costs, low thermal robustness, and excessive power ratings. This work explores a rf power generation system based on switched-mode power amplifiers (PAs), with associated PA system architecture, control techniques, and implementation optimizations, to achieve both high performance and good efficiency for the target applications.
Book Synopsis Modeling and Design Techniques for RF Power Amplifiers by : Arvind Raghavan
Download or read book Modeling and Design Techniques for RF Power Amplifiers written by Arvind Raghavan and published by John Wiley & Sons. This book was released on 2008-02-04 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Achieve higher levels of performance, integration, compactness, and cost-effectiveness in the design and modeling of radio-frequency (RF) power amplifiers RF power amplifiers are important components of any wireless transmitter, but are often the limiting factors in achieving better performance and lower cost in a wireless communication system—presenting the RF IC design community with many challenges. The next-generation technological advances presented in this book are the result of cutting-edge research in the area of large-signal device modeling and RF power amplifier design at the Georgia Institute of Technology, and have the potential to significantly address issues of performance and cost-effectiveness in this area. Richly complemented with hundreds of figures and equations, Modeling and Design Techniques for RF Power Amplifiers introduces and explores the most important topics related to RF power amplifier design under one concise cover. With a focus on efficiency enhancement techniques and the latest advances in the field, coverage includes: Device modeling for CAD Empirical modeling of bipolar devices Scalable modeling of RF MOSFETs Power amplifier IC design Power amplifier design in silicon Efficiency enhancement of RF power amplifiers The description of state-of-the-art techniques makes this book a valuable and handy reference for practicing engineers and researchers, while the breadth of coverage makes it an ideal text for graduate- and advanced undergraduate-level courses in the area of RF power amplifier design and modeling.
Book Synopsis Advanced Design Techniques for RF Power Amplifiers by : Anna N. Rudiakova
Download or read book Advanced Design Techniques for RF Power Amplifiers written by Anna N. Rudiakova and published by Springer Science & Business Media. This book was released on 2006-09-09 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Design Techniques for RF Power Amplifiers provides a deep analysis of theoretical aspects, modelling, and design strategies of RF high-efficiency power amplifiers. The book can be used as a guide by scientists and engineers dealing with the subject and as a text book for graduate and postgraduate students. Although primarily intended for skilled readers, it provides an excellent quick start for beginners.
Book Synopsis Efficient Radio Frequency Power Generation and Impedance Matching by : Anas Ibrahim Al Bastami
Download or read book Efficient Radio Frequency Power Generation and Impedance Matching written by Anas Ibrahim Al Bastami and published by . This book was released on 2020 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt: A wide range of applications require the efficient generation and delivery of radio-frequency (rf) power to do useful work. This is commonly achieved by utilizing an rf power amplifier or inverter that delivers the required amount of power to the load. In many applications, the load impedance varies widely due to changes in the operating conditions. A key challenge in these rf power delivery systems is attaining high efficiency and performance across all operating conditions, including accurate control of the delivered power, and achieving wide bandwidths with respect to power delivery and/or load variation. Typical rf amplifiers and inverters operate efficiently into a fixed load resistance, but their performance heavily degrades with variations in load impedance. This problem is often addressed through tunable matching networks (TMNs), which provide adaptive impedance transformation between the rf source and load. However, they become costly, bulky, and slow in response to load changes, especially at high power levels (hundreds to thousands of watts and above). This thesis develops solutions for efficient generation and delivery of rf power into dynamically-varying loads, with a focus on systems suitable for plasma generation at power levels from hundreds of watts to tens of kilowatts. It presents an efficient, low cost, and small size alternative to a TMN that achieves acceptable impedance matching for inductively-coupled rf plasma systems. It also develops techniques that enable the design of an efficient high power TMN capable of very fast modulation of impedance. In addition, this thesis explores different architectural implementations for complete rf generation and power delivery systems that are efficient, fast, and capable of driving a wide load range with accurate control of power, and identifies the most promising implementations. While the solutions in this thesis are demonstrated in the context of plasma generation systems, they can be applied to many other systems having dynamically-varying rf loads.
Book Synopsis Elements of Radio Frequency Energy Harvesting and Wireless Power Transfer Systems by : Taimoor Khan
Download or read book Elements of Radio Frequency Energy Harvesting and Wireless Power Transfer Systems written by Taimoor Khan and published by CRC Press. This book was released on 2020-11-13 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on elementary concepts of both radio frequency energy harvesting (RFEH) and wireless power transfer (WPT), and highlights their fundamental requirements followed by recent advancements. It provides a systematic overview of the key components required for RFEH and WPT applications and also comprehensively introduces the pioneering research advancements achieved to date. The state-of-the-art circuit design topologies for the two different applications are presented mainly in terms of antenna operating frequencies, polarization characteristics, efficient matching network circuits, rectifier topologies, and overall rectenna systems. The book serves as a single point of reference for practicing engineers and researchers searching for potential sources and elements involved in the RFEH system as well as in the WPT system, and need rapid training and design guidelines in the following areas: • Different sensing elements used in RFEH and WPT • Inclusions of mathematical expressions and design problems • Illustration of some design examples and performance enhancement techniques
Book Synopsis Design Considerations for Radio Frequency Power Converters by : Lei Gu (Researcher in power electronics)
Download or read book Design Considerations for Radio Frequency Power Converters written by Lei Gu (Researcher in power electronics) and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Compact and efficient high-frequency power converters and amplifiers are needed in a variety of applications, including base stations, mobile devices, and medical equipment. The ever-growing need for a smaller size, longer battery life, and lower cost introduces challenging design considerations for radio-frequency power converters. Today, these radio-frequency resonant converters use harmonic tuning to shape the voltage or current waveform of the switching device, with the primary goals of reducing device stress and increasing achievable efficiency. Although harmonic-tuned resonant converters can be very compact and efficient for a certain condition, significant challenges remain to widespread adoption, including limited high-efficiency range, complicated design procedures, and higher device stress compared with conventional approaches. This thesis presents circuit techniques that can extend the voltage, frequency, and efficiency ranges of radio-frequency power converters and provides more straightforward analysis and easy-to-implement design procedures. This thesis first presents a multi-resonant gate driver circuit developed using the harmonic wave-shaping technique that significantly reduces the high-frequency gate driving losses for Si and SiC MOSFETs. By controlling different harmonic components of an ideal square wave, we can resonantly shape a quasi-square voltage waveform at the gate. This gate driver is simple to control and has a low component count. Compared with a sine wave gate signal, this method reduces the transition time between the MOSFET is fully enhanced and turned-off, driving down the switching losses. Compared with similar multi-resonant drivers that are self-oscillating, this driver reduces the long start-up time required to reach steady-state. Intuitive design methodologies based on the frequency-domain plot are introduced. Using this technique, we are able to resonantly drive a Si MOSFET at 20 MHz and recycle 60% of the hard-switching gate-driving loss. We also demonstrate this driver on a SiC MOSFET switching at 30 MHz and save 80% of the hard-switching loss. Modern applications demand power converters to maintain a constant voltage output with high efficiency across significant load variation. This thesis presents a bidirectional dc-dc converter that enables efficient fixed-ratio voltage conversion at tens of megahertz. By selecting a proper matching network for the intermediate gain stage, we address multiple challenges simultaneously; a) replacing a lossy passive diode with a more efficient active transistor, b) maintaining efficient soft-switching operation, and c) a constant voltage conversion ratio over a wide load range. A 64 MHz, 12 W, 36 V-to-12 V prototype converter with 75% peak efficiency verifies the operation of the structure. An interleaved configuration is then proposed to improve the efficiency and transient performance of a single-phase structure. A 13.56 MHz, 210 V-to-30 V prototype converter with 90% peak efficiency at 200 W demonstrates the advantages of this proposed structure. RF power amplifiers underpin many systems that support our modern infrastructure. The Class EF and E/F family of harmonic-tuned switch-mode amplifiers have simple gate drives, reduced voltage stress, and higher output power capabilities than a conventional Class E circuit. To best utilize the performance potential of this family of circuits, this thesis presents a novel push-pull Phi2 (EF2) amplifier using interleaving and series-stacking techniques, denoted as a PPT Phi2 circuit. This series-stacked PPT Phi2 circuit combines all of the main advantages of different topologies, like the simplicity of gate driving, highest cut-off frequency, lowest voltage stress, and load-invariant operation. A compact 6.78 MHz, 100 V, 300 W prototype converter is demonstrated. Using lowcost Si devices, the prototype converter achieves 96% peak total efficiency and maintains above 94.5% drain efficiency across a wide range of voltage and power. This new series-stacked PPT F2 RF amplifier doubles the maximum operating frequency and voltage range of a Class EF or E/F amplifier with benefits in many modern applications that require high-frequency high-power RF signals, like wireless charging for electric vehicles, plasma RF drives, and nuclear magnetic resonance (NMR) spectroscopy.
Author :Paulo Augusto Dal Fabbro Publisher :Springer Science & Business Media ISBN 13 :9048193613 Total Pages :171 pages Book Rating :4.0/5 (481 download)
Book Synopsis Linear CMOS RF Power Amplifiers for Wireless Applications by : Paulo Augusto Dal Fabbro
Download or read book Linear CMOS RF Power Amplifiers for Wireless Applications written by Paulo Augusto Dal Fabbro and published by Springer Science & Business Media. This book was released on 2010-06-22 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in electronics have pushed mankind to create devices, ranging from - credible gadgets to medical equipment to spacecraft instruments. More than that, modern society is getting used to—if not dependent on—the comfort, solutions, and astonishing amount of information brought by these devices. One ?eld that has continuously bene?tted from those advances is the radio frequency integrated c- cuit (RFIC) design, which in its turn has promoted countless bene?ts to the mankind as a payback. Wireless communications is one prominent example of what the - vances in electronics have enabled and their consequences to our daily life. How could anyone back in the eighties think of the possibilities opened by the wireless local area networks (WLANs) that can be found today in a host of places, such as public libraries, coffee shops, trains, to name just a few? How can a youngster, who lives this true WLAN experience nowadays, imagine a world without it? This book dealswith the design oflinearCMOS RF PowerAmpli?ers(PAs). The RF PA is a very important part of the RF transceiver, the device that enables wireless communications. Two important aspects that are key to keep the advances in RF PA design at an accelerate pace are treated: ef?ciency enhancement and frequen- tunable capability. For this purpose, the design of two different integrated circuits realizedina0. 11μmtechnologyispresented,eachoneaddressingadifferentaspect. With respect to ef?ciency enhancement, the design of a dynamic supply RF power ampli?er is treated, making up the material of Chaps. 2 to 4.
Book Synopsis Advanced Techniques in RF Power Amplifier Design by : Steve C. Cripps
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 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: This much-anticipated volume builds on the author's popular work, RF Power Amplifiers for Wireless Communications (Artech House, 1999), offering you 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 enables you to efficiently design linear RF power amplifiers , and includes detailed discussions on envelope power management schemes and linearization techniques.
Book Synopsis Circuits and Passive Components for Radio-frequency Power Conversion by : Yehui Han (Ph. D.)
Download or read book Circuits and Passive Components for Radio-frequency Power Conversion written by Yehui Han (Ph. D.) and published by . This book was released on 2010 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: (cont.) A measurement method is proposed to identify loss characteristics of different commercial rf magnetic core materials. The loss characteristics of these materials, which have not previously been available, are illustrated and compared in tables and figures. Based on results in characterization of magnetic materials, the thesis describes a procedure for magnetic components design with low permeability magnetic materials that is for very high frequency power conversion applications. This procedure provides a method to compare and evaluate different magnetic materials for given specifications of a magnetic-core inductor. Some important information, e.g. quality factor and size of the inductor can be predicted before the final design. The thesis also investigates some problems such as optimization of a magnetic-core inductor.
Book Synopsis Design of Low-voltage, High-bandwidth Radio Frequency Power Converters by : Jingying Hu (Ph. D.)
Download or read book Design of Low-voltage, High-bandwidth Radio Frequency Power Converters written by Jingying Hu (Ph. D.) and published by . This book was released on 2012 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: The mass and volume required for power electronics circuitry is a dominant obstacle to the miniaturization and integration of many systems. Likewise, power electronics with greater bandwidth and efficiency are becoming vital in many applications. To realize smaller and highly responsive power electronics at low voltages, this thesis explores devices, circuits, and passives capable of operating efficiently at very high frequencies (VHF, 30-300 MHz). Operation at these frequencies enables reduction of the numerical values and physical size of the passive components that dominate power converters, and enables increased bandwidth and transient performance which is valuable in a multitude of low-voltage and low-power applications. This thesis explores the scaling of magnetic component size with frequency, and it is shown that substantial miniaturization is possible with increased frequencies even considering material and heat transfer limitations. Moreover, the impact of frequency scaling of power converters on magnetic components is investigated for different design criteria. Quantitative examples of magnetics scaling are provided that clearly demonstrate the benefits and opportunities in VHF magnetics design. It is shown to utilize the advantages of frequency scaling on passive component size that system losses and other limitations must be considered. One such area that is examined is semiconductor device requirements, where through a combination of device layout optimization for cascode structures and integrated gate drive designs on a 0.35-um CMOS process, converter performance (i.e., loss and bandwidth) can be significantly improved in the VHF regime. In this thesis a dc-dc converter topology is developed that is suitable for low-voltage power conversion and employs synchronous rectification to improve efficiency. The converter is also comprised of a high-bandwidth and high-switching-frequency inverter topology that can dynamically adjust the output power from one-quarter to full power, while maintaining good efficiency. Furthermore, with its inherent capability of gate-width switching, the inverter can further reduce gating loss by one-half resulting in substantial performance improvements at light load operation. A major contribution of this thesis is the development of a synchronous rectifier operating in the VHF regime. VHF power conversion is especially challenging at low voltages due to poor efficiency resulting from rectification loss. To overcome diode rectification loss, the benefits of synchronous rectification are discussed in the context of a 100MHz class-E resonant rectifier, which results in a 2.5 x overall converter efficiency improvement. The culmination of the developed design techniques in passives, semiconductor devices, and circuit topologies is an experimental prototype of a miniaturized 100MHz, 1W power converter utilizing synchronous rectification.
Book Synopsis High Frequency Multi-resonant Power Conversion Techniques by : Wojciech Antoni Tabisz
Download or read book High Frequency Multi-resonant Power Conversion Techniques written by Wojciech Antoni Tabisz and published by . This book was released on 1990 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Power Effeceint [i.e. Efficient] Radio Frequency Transmitters for Wir[e]less Digital Mobile Applications by : Golsa Ghiaasi-Hafezi
Download or read book Power Effeceint [i.e. Efficient] Radio Frequency Transmitters for Wir[e]less Digital Mobile Applications written by Golsa Ghiaasi-Hafezi and published by . This book was released on 2003 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Integrated Power Conversion Circuit for Radio Frequency Energy Harvesting by : Qian Gong
Download or read book Integrated Power Conversion Circuit for Radio Frequency Energy Harvesting written by Qian Gong and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Introduction to RF Power Amplifier Design and Simulation by : Abdullah Eroglu
Download or read book Introduction to RF Power Amplifier Design and Simulation written by Abdullah Eroglu and published by CRC Press. This book was released on 2018-09-03 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction to RF Power Amplifier Design and Simulation fills a gap in the existing literature by providing step-by-step guidance for the design of radio frequency (RF) power amplifiers, from analytical formulation to simulation, implementation, and measurement. Featuring numerous illustrations and examples of real-world engineering applications, this book: Gives an overview of intermodulation and elaborates on the difference between linear and nonlinear amplifiers Describes the high-frequency model and transient characteristics of metal–oxide–semiconductor field-effect transistors Details active device modeling techniques for transistors and parasitic extraction methods for active devices Explores network and scattering parameters, resonators, matching networks, and tools such as the Smith chart Covers power-sensing devices including four-port directional couplers and new types of reflectometers Presents RF filter designs for power amplifiers as well as application examples of special filter types Demonstrates the use of computer-aided design (CAD) tools, implementing systematic design techniques Blending theory with practice, Introduction to RF Power Amplifier Design and Simulation supplies engineers, researchers, and RF/microwave engineering students with a valuable resource for the creation of efficient, better-performing, low-profile, high-power RF amplifiers.
Book Synopsis Practical RF Power Design Techniques by : Irving M. Gottlieb
Download or read book Practical RF Power Design Techniques written by Irving M. Gottlieb and published by TAB/Electronics. This book was released on 1993 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is aimed at electronics hobbyists, especially amateur radio operators and shortwave listeners, electronics technicians, and students of electronics. This practical guide to radio frequency power design and tecniques uses real-world values for electronic components throughout and avoids a theoretical and mathametical approach.
Book Synopsis High-frequency Off-line Power Conversion Using Quasi-resonant and Multi-resonant Techniques by : Milan Miodrag Jovanović
Download or read book High-frequency Off-line Power Conversion Using Quasi-resonant and Multi-resonant Techniques written by Milan Miodrag Jovanović and published by . This book was released on 1988 with total page 726 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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