A novel broadband power amplifier architecture for high efficiency and high linearity applications

A novel and simple architecture for improving efficiency, bandwidth and linearity at backed-off RF power is presented. It is accomplished by a distributed amplifier with proper turn on and off of the transistor devices via an RF detector. Neither RF power combiner/splitter, DSP nor envelope amplifie...

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Bibliographic Details
Main Authors: Alidio, Raul, Woo Yong Lee, Gummalla, Ajay, Achour, Maha
Format: Conference Proceeding
Language:English
Subjects:
Bandwidth
Broadband amplifiers
Detectors
Digital signal processing
Distributed amplifiers
envelope detection
High power amplifiers
Linearity
MMIC
orthogonal frequency-division multiplexing (OFDM)
power added efficiency
power amplifier (PA)
power amplifier architecture
Power combiners
Radio frequency
Radiofrequency amplifiers
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Summary:A novel and simple architecture for improving efficiency, bandwidth and linearity at backed-off RF power is presented. It is accomplished by a distributed amplifier with proper turn on and off of the transistor devices via an RF detector. Neither RF power combiner/splitter, DSP nor envelope amplifier is utilized. A MMIC prototype was designed and fabricated using a GaAs HBT process to verify this efficient, linear and broadband PA architecture and it measured 3% EVM and 24-25% PAE at 19.6 dBm from 2.3 GHz to 2.7 GHz using a 54 Mbps 64 QAM OFDM modulation signal.
ISSN:0149-645X
2576-7216
DOI:10.1109/MWSYM.2010.5515164