Download or read book Two Port Network Theory Based Design Method of Broadband Doherty Power Amplifier written by Yue Li and published by . This book was released on 2018 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: LTE-Advanced (LTE-A) is a widely used communication standard and it mainly features Carrier aggregation (CA). CA increases the user data rate and efficiently exploits the fragmented spectrum by combining various carrier frequencies. The intrinsic multi-band and multi-standard of CA, along with the existing high peak-to-average power ratio (PAPR), brings the challenges of broadband requirement and back-off (BO) efficiency enhancement when designing radio frequency power amplifiers (PA). The above two challenges inspire research interest in designing of broadband Doherty power amplifiers (DPAs), which maintain the high efficiency at BO power level and perform constantly versus frequency. In this work, the continuous design space was discussed. Output combining and matching network (OCMN) and its impact on the impedances shown to the two transistors were analyzed based on two port network theory. ABCD parameters of matching networks was formulated to accommodate continuous class-B (class-J) operation to DPAs. Second harmonic was terminated to avoid clipping and efficiency degradation. By enlarging design space, the bandwidth was substantially expanded. The proposed design methodology allowed the adsorption of parasitics which was the one of the bandwidth limiting factor. To validate the proposed methodology, an 8 Watts DPA was simulated to operate from 3 GHz to 5 GHz using Cree Gallium nitride (GaN) High-electron-mobility transistors (HEMTs). And simulation results showed that the 6dB BO efficiency was above 40% and Peak-envelope-power (PEP) of 50% over the frequency range of 3GHz to 5GHz. The Doherty power amplifier prototype is fabricated on substrate of Rogers4003C and assembled in house. Continuous wave measurement showed that the PA could provide 8.2 - 10.6 dB gain in the frequency band of 2.7 to 4.3 GHz. The 6 dB back off efficiency was 40% to 43%. And at peak power, the drain efficiency reached 48% to 60%. 80 MHz inter-band modulated signal and 15MHz dual band signal measurement were carried out to investigate the linearizability. In the inter-band measurement, average power around 33dBm and average drain efficiency of 46% was obtained with PAPR of 6.4 dB. ACLR above 48.7 dBc after DPD verified the easiness of linearization for this PA. Dual band measurement using two carriers at 2.8 and 3.2 GHz showed even when the PAPR of two band were 7.6 and 8.0 dB separately, average power of 32.3 dBm power can still be extracted with average efficiency of 40.5%. ACLR of 49.5 and 46.7 dBc of those two bands were good endorsement of the capability of inter-band concurrent amplification.

Download or read book Broadband RF and Microwave Amplifiers written by Andrei Grebennikov and published by CRC Press. This book was released on 2017-07-12 with total page 750 pages. Available in PDF, EPUB and Kindle. Book excerpt: Broadband RF and Microwave Amplifiers provides extensive coverage of broadband radio frequency (RF) and microwave power amplifier design, including well-known historical and recent novel schematic configurations, theoretical approaches, circuit simulation results, and practical implementation strategies. The text begins by introducing two-port networks to illustrate the behavior of linear and nonlinear circuits, explaining the basic principles of power amplifier design, and discussing impedance matching and broadband power amplifier design using lumped and distributed parameters. The book then: Shows how dissipative or lossy gain-compensation-matching circuits can offer an important trade-off between power gain, reflection coefficient, and operating frequency bandwidth Describes the design of broadband RF and microwave amplifiers using real frequency techniques (RFTs), supplying numerous examples based on the MATLAB® programming process Examines Class-E power amplifiers, Doherty amplifiers, low-noise amplifiers, microwave gallium arsenide field-effect transistor (GaAs FET)-distributed amplifiers, and complementary metal-oxide semiconductor (CMOS) amplifiers for ultra-wideband (UWB) applications Broadband RF and Microwave Amplifiers combines theoretical analysis with practical design to create a solid foundation for innovative ideas and circuit design techniques.

Download or read book Substrate Integrated Suspended Line Circuits and Systems written by Kaixue Ma and published by Artech House. This book was released on 2024-03-31 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: Substrate Integrated Suspended Line Circuits and Systems provides a systematic overview of the new transmission line - the substrate-integrated suspension line (SISL). It details the fundamentals and classical application examples of the SISL. The basic SISL concept and structure, various passive circuits and active circuits, and front-end sub-systems are systematically introduced. Featuring research on topics such as high-performance RF/microwave/mm-wave circuits and system, this book is ideal for researchers, engineers, scientists, scholars, educators, and students. Since transmission line is a fundamental component of microwave and mm-wave circuits, the properties of a transmission line, such as losses, size, and dispersion, are vital to the performance of the whole system. Suspended line has been proved to be an excellent transmission line, as it has attractive features such as low loss, weak dispersion, high power capacity, and low effective dielectric constant. However, Conventional waveguide suspended line circuits require metal housing to form air cavities which is Substrate Integrated Suspended Line Circuits and Systems essential to the operation of suspended lines circuits. Also, the metal shell should provide mechanical support and shielding, which contribute to large size and heavy weight. Meanwhile, precise mechanical fabrication and assembling are strongly required, which brings difficulties to the design and fabrication of conventional suspended line circuits, and the manufacturing cost of suspended line circuits increases correspondingly. In this book, we will introduce a new platform of high-performance transmission line, i.e. substrate integrated suspended line (SISL). SISL keeps all the merits of the suspended line while overcomes the drawbacks of conventional waveguide suspended line circuits. Moreover, it is self-packaged and highly integrated. The basic SISL concept and structure, various passive circuits and active circuits, and front-end sub-systems will be systematically introduced. Featuring research on topics such as high-performance RF/microwave/mm-wave circuits and system, this book is ideally designed for researchers, engineers, scientists, scholars, educators, and students.

Download or read book Theory and Design of Broadband Matching Networks written by Wai-Kai Chen and published by Elsevier. This book was released on 2013-10-22 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: Theory and Design of Broadband Matching Networks centers on the network theory and its applications to the design of broadband matching networks and amplifiers. Organized into five chapters, this book begins with a description of the foundation of network theory. Chapter 2 gives a fairly complete exposition of the scattering matrix associated with an n-port network. Chapter 3 considers the approximation problem along with a discussion of the approximating functions. Chapter 4 explains the Youla's theory of broadband matching by illustrating every phase of the theory with fully worked out examples. The extension of Youla's theory to active load impedance is taken up in Chapter 5. This book will be useful as a reference for practicing engineers who wish to learn how the modern network theory can be applied to the design of many practical circuits.

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 Electronic Engineering Applications of Two Port Networks written by H. B. Gatland and published by Elsevier. This book was released on 2016-06-06 with total page 341 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electronic Engineering Applications of Two-Port Networks aims to present the method of developing two-port theory to form the basis of a course on linear electronic systems. This book specifically presents topics on small-signal parameters; two-port models; small-signal analysis of the common-emitter amplifier; and general analysis of small-signal amplifier performance. A chapter is devoted to discussing topics on tandem connections of two ports, which is followed by exercises on matrix reduction. This text also tackles basic feedback connections, feedback amplifiers, and feedback oscillators. The application of the feedback systems is then examined. This book concludes by explaining the capacitive effects on transistor performance. This text will be beneficial to students and experts in the field of electronics.

Download or read book RF and Microwave Power Amplifier Design Second Edition written by Andrei Grebennikov and published by McGraw-Hill Education. This book was released on 2015-02-12 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Publisher's Note: Products purchased from Third Party sellers are not guaranteed by the publisher for quality, authenticity, or access to any online entitlements included with the product. The latest power amp design methods Fully updated to address cutting-edge technologies, the new edition of this practical guide provides comprehensive, state-of-the-art coverage of RF and microwave power amplifier design. The book describes both existing and new schematic configurations, theoretical approaches, circuit simulation results, and implementation techniques. New chapters discuss linearization and efficiency enhancement and high-efficiency Doherty power amplifiers. Featuring a systematic approach, this comprehensive resource bridges the theory and practice of RF and microwave engineering. RF and Microwave Power Amplifier Design, Second Edition, covers: Two-port network parameters and passive elements Nonlinear circuit design methods Nonlinear active device modeling Impedance matching Power transformers, combiners, and couplers Power amplifier design fundamentals High-efficiency power amplifier design Broadband power amplifiers Linearization and efficiency enhancement techniques High-efficiency Doherty power amplifiers

Download or read book Design of a Broadband Doherty Power Amplifier with a Graphical User Interface Tool written by Pingzhu Gong and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A novel broadband Doherty Power Amplifier (DPA) design for 4G applications is presented with the aid of a modified version of DPA Graphical User Interface (GUI) Tool. Compared to the previous version, the new GUI uses Output Back-Off (OBO) as the input instead of the peak power ratio of the DPA Main and auxiliary PAs. Furthermore, the load impedance seen by the Main PA (MPA) at 2nd harmonic and 3rd harmonic can be directly controlled from the GUI. In this design, Main PA is operated under class F mode and the auxiliary PA is operated under Class C mode. The main PA is biased at -3.2 V at the gate (lower than typical values: -2.7 V ~ -3 V) to boost the efficiency. A new parasitic network with simple structure is extracted using OSU Embedding Model. Design procedures are stated as follows. Fundamental load impedances seen by both PAs are generated by GUI at Current source Reference Plane (CRP). Then, the Output Matching Network (OMN) is synthesized at CRP for both PAs separately. At last, the input matching network and the equal split Wilkinson power divider are designed to realize the broadband DPA. Electromagnetic (EM) Co-simulation result shows the DPA achieves 59.4-62.2% drain efficiency at 8-dB OBO at 1.5-2.2GHz with a gain of 10-13dB. The peak power range is between 43.7 dBm and 44.5 dBm. The THD and IM3 is around -15dB at back off power. The performance of the proposed DPA iii design is shown to be comparable to state-of-the-art designs, which indicates our DPA has a good performance.

Download or read book Design and Optimization of the Doherty Power Amplifier for Broadband Applications written by Guolin Sun and published by . This book was released on 2012 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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.

Download or read book Broadband Doherty Power Amplifier Using Symmetrical GaN Transistors written by Aneta Wyrzykowska and published by . This book was released on 2014 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: The wireless industry has seen a tremendous growth in its users over the last decade. This has led the industry to adapt a number of new standards allowing for better use of the scarce and often very fragmented frequency spectrum. [1] The new standards have brought with them the use of OFDM signaling to allow for higher data rates and better robustness against frequency selective channel interference. The OFDM protocols combined with multi-standard radios however have provided many challenges to the radio frequency, RF, industry with the largest challenge presented to the power amplifier design. The OFDM signals are well known for their high peak to average power ratio which forces the RF equipment to work at significant back-off compared to peak power. This unfortunately leads to rather low system efficiencies. To address the problem the Doherty power amplifier has been brought back into the design community as it directly solves the issues related to average power efficiency. To date however many of the Doherty designs have focused on the narrowband application of the power amplifier often targeting a single standard with bandwidths directly tied to the operational band which at best is usually only couple hundred MHz wide. With the recent changes in the standards and the ever growing desire to provide several standards on one radio the Doherty has to be redesigned to allow for broadband communications. This thesis examines the major sources of bandwidth limitation in the Doherty power amplifier and provides a review of the current approaches to solving the problem. It then goes on to propose several changes in the Doherty architecture to allow for the use of complex impedance to provide both higher efficiency at back-off and wider operational bandwidth. The proposed technique was then used to design a symmetrical Doherty power amplifier targeted to operate in the 1.8 - 2.8 GHz frequency range with 42 dBm of output power and back-off efficiency above 50%.

Download or read book Distributed Power Amplifiers for RF and Microwave Communications written by Narendra Kumar and published by Artech House. This book was released on 2015-06-01 with total page 365 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new resource presents readers with all relevant information and comprehensive design methodology of wideband amplifiers. This book specifically focuses on distributed amplifiers and their main components, and presents numerous RF and microwave applications including well-known historical and recent architectures, theoretical approaches, circuit simulation, and practical implementation techniques. A great resource for practicing designers and engineers, this book contains numerous well-known and novel practical circuits, architectures, and theoretical approaches with detailed description of their operational principles.

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 Fundamentals of RF and Microwave Transistor Amplifiers written by Inder Bahl and published by John Wiley & Sons. This book was released on 2009-06-17 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Comprehensive and Up-to-Date Treatment of RF and Microwave Transistor Amplifiers This book provides state-of-the-art coverage of RF and microwave transistor amplifiers, including low-noise, narrowband, broadband, linear, high-power, high-efficiency, and high-voltage. Topics covered include modeling, analysis, design, packaging, and thermal and fabrication considerations. Through a unique integration of theory and practice, readers will learn to solve amplifier-related design problems ranging from matching networks to biasing and stability. More than 240 problems are included to help readers test their basic amplifier and circuit design skills-and more than half of the problems feature fully worked-out solutions. With an emphasis on theory, design, and everyday applications, this book is geared toward students, teachers, scientists, and practicing engineers who are interested in broadening their knowledge of RF and microwave transistor amplifier circuit design.

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 Switchmode RF and Microwave Power Amplifiers written by Andrei Grebennikov and published by Academic Press. This book was released on 2021-03-19 with total page 840 pages. Available in PDF, EPUB and Kindle. Book 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

Download or read book Design of Ultra Wideband Antenna Matching Networks written by Binboga Siddik Yarman and published by Springer Science & Business Media. This book was released on 2008-08-25 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt: Design of Ultra Wideband Antenna Matching Networks: via Simplified Real Frequency Technique (SRFT) will open up a new horizon for design engineers, researchers, undergraduate and graduate students to construct multi-band and ultra wideband antenna matching networks for antennas which in turn will push the edge of technology to manufacture new generation of complex communication systems beyond microwave frequencies both in commercial and military line. In Design of Ultra Wideband Antenna Matching Networks, many real life examples are presented to design antenna matching networks over HF and cellular commercial multi-band frequencies. For each example, open MatLab source codes are provided so that the reader can easily generate and verify the results of the examples included in the book.