Journal ArticleDOI
A fully matched N-way Doherty amplifier with optimized linearity
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TLDR
In this paper, a fully matched N-way Doherty amplifier with two-, three-, and four-way structures is presented. And the linearity performance of the Doherty amplifiers is optimized for better efficiency versus linearity by a bias adjustment of the peaking amplifiers.Abstract:
This paper presents a new fully matched N-way Doherty amplifier. The basic principles of operation and important features are described. For the experimental verification, 2.14-GHz Doherty amplifiers having two-, three-, and four-way structures are implemented using silicon LDMOSFETs and tested using down-link WCDMA signal. The linearity performances of the two-, three-, and four-way Doherty amplifiers are optimized for better efficiency versus linearity by a bias adjustment of the peaking amplifiers. For simultaneously improving the efficiency and linearity to achieve maximum efficiency versus linearity, the gate biases of the peaking amplifiers for the N-way Doherty amplifier are optimized. As a result, the efficiency versus linearity characteristics are drastically improved by N-way extension of the Doherty amplifier.read more
Citations
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Book
High Efficiency RF and Microwave Solid State Power Amplifiers
TL;DR: In this paper, the authors present an overview of power amplifiers and their application in the context of load-pulling and power-combiner networks, as well as their properties.
Journal ArticleDOI
Optimum operation of asymmetrical-cells-based linear Doherty power Amplifiers-uneven power drive and power matching
TL;DR: In this paper, a Doherty amplifier with uneven input drive and individual matching for the carrier and peaking cells was proposed, where higher input power is delivered to the peaking cell rather than the carrier cell for optimized linear power operation, especially for appropriate load modulation.
Journal ArticleDOI
Analysis and design of a high-efficiency multistage Doherty power amplifier for wireless communications
TL;DR: In this paper, a multistage Doherty power amplifier that meets wide-band code-division multiple access (WCDMA) requirements is demonstrated, and the power amplifier exhibits a power-added efficiency (PAE) of 42% at 6-dB output power backoff and 27% at 12-dB performance backoff.
Journal ArticleDOI
3–3.6-GHz Wideband GaN Doherty Power Amplifier Exploiting Output Compensation Stages
TL;DR: In this article, the design, realization and experimental characterization of a GaN-based hybrid Doherty power amplifier for wideband operation in the 3-3.6 GHz frequency range is discussed.
Journal ArticleDOI
High-Efficiency Doherty Power Amplifiers: Historical Aspect and Modern Trends
Andrei Grebennikov,Senad Bulja +1 more
TL;DR: The historical aspect of the Doherty approach to the power-amplifier design introduced in 1936 and modern trends in Doherty amplifier (DA) design techniques using multistage and asymmetric multiway architectures are described and discussed.
References
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Book
RF Power Amplifiers for Wireless Communications
TL;DR: In this paper, the authors present a power amplifier design for GHz frequency bands at GHz GHz frequency band with overdrive and overdrive-only overdrive modes, as well as a switch-mode Amplifier for RF applications.
Journal ArticleDOI
Power amplifiers and transmitters for RF and microwave
Frederick H. Raab,Peter M. Asbeck,Steve Cripps,Peter B. Kenington,Zoya Popovic,Nick Pothecary,John F. Sevic,Nathan O. Sokal +7 more
TL;DR: In this article, a wide variety of techniques, implementations, and active devices are presented to generate RF/microwave power for wireless communications, but also in applications such as jamming, imaging, RF heating, and miniature dc/dc converters.
Book
High-Linearity RF Amplifier Design
TL;DR: This is the first single comprehensive guide to examine and directly compare all major RF power amplifier linearization techniques in detail and save you valuable design time while helping to avoid costly design errors.
Journal ArticleDOI
Efficiency of Doherty RF Power-Amplifier Systems
TL;DR: A Doherty system combines the outputs of two or more linear RF power amplifiers through an impedance-inverting coupler such as a quarter-wave transmission line and can be considerably more efficient than a conventional class-B linear PA.
Journal ArticleDOI
An extended Doherty amplifier with high efficiency over a wide power range
TL;DR: In this article, an extension of the Doherty amplifier, which maintains high efficiency over a wide range of output power (>6 dB), is demonstrated experimentally with InGaP/GaAs heterojunction bipolar transistors at 950 MHz.