Journal ArticleDOI
Not Just a Phase: Outphasing Power Amplifiers
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TLDR
In this article, the outphasing concept has been explored to address this tradeoff by using efficient but nonlinear elements in an architecture providing linear output power control, but these two modes are mutually exclusive.Abstract:
Performing RF amplification in a way that is simultaneously linear and efficient has long been a challenge in power amplifier (PA) design. In short, single-transistor PAs can either be operated in a linear (but inefficient) current-source mode of operation or as efficient (but nonlinear) switches, but these two modes are mutually exclusive. The outphasing concept has been explored to address this tradeoff by using efficient but nonlinear elements in an architecture providing linear output power control.read more
Citations
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Journal ArticleDOI
Planar Microwave Engineering: A Practical Guide to Theory, Measurement and Circuits
TL;DR: In this article, the authors present a practical guide to the theory of planar microwave engineering, based on the tlm method, which is used in the design of microwave wireless components.
Journal ArticleDOI
A 28-GHz Flip-Chip Packaged Chireix Transmitter With On-Antenna Outphasing Active Load Modulation
TL;DR: Theoretical analysis and simulation results prove that the proposed DLA is electrically equivalent to an ideal differential series non-isolating power combiner, enabling superior on-antenna outphasing operation.
Journal ArticleDOI
Preparing Linearity and Efficiency for 5G: Digital Predistortion for Dual-Band Doherty Power Amplifiers with Mixed-Mode Carrier Aggregation
Noel Kelly,Wenhui Cao,Anding Zhu +2 more
TL;DR: The traditional RF transmitter chain is faced with an evolving set of challenges as signal bandwidths are continuously growing, and future fifth-generation (5G) systems will continue to place new demands on the transmit chain.
Journal ArticleDOI
A Super-Resolution Mixed-Signal Doherty Power Amplifier for Simultaneous Linearity and Efficiency Enhancement
TL;DR: This article presents a mixed-signal Doherty power amplifier (MSDPA) architecture for simultaneous linearity and efficiency enhancement, which makes the MSDPA conducive to millimeter-wave (mm-Wave) or compound PA designs by obviating the need for a large effective number of bits on AM digital controls.
References
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Journal ArticleDOI
Class E-A new class of high-efficiency tuned single-ended switching power amplifiers
Nathan O. Sokal,Alan D. Sokal +1 more
TL;DR: In this article, a load network is synthesized to have a transient response which maximizes power efficiency even if the active device switching times are substantial fractions of the a.c. cycle.
Journal ArticleDOI
Single-Sideband Transmission by Envelope Elimination and Restoration
TL;DR: In this article, a new type of single-sideband transmitter is described, which does not require the use of linear radio-frequency amplifiers, and is especially suitable for high-power operation.
Book
Advanced Techniques in RF Power Amplifier Design
TL;DR: RF power amplifier modes Doherty and Chireix - themes and variations topics in PA non-linearity envelope feedback predistortion feedforward microwave-power amplifier design.
Journal ArticleDOI
Linear Amplification with Nonlinear Components
TL;DR: A technique for producing bandpass linear amplification with nonlinear components (LINC) is described, which produces an amplified and/or translated replica of the original signal.