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Drive-characteristic design for dual-input Doherty power amplifiers

Singerl, Peter and Magesacher, Thomas LU (2016) 2016 IEEE MTT-S International Microwave Symposium, IMS 2016 In 2016 IEEE MTT-S International Microwave Symposium, IMS 2016 2016-August.
Abstract

Doherty power amplifiers (PAs) can achieve high efficiency with modulated signals since they exhibit an efficiency-peak in backoff that can, in theory, reach full-scale efficiency. Unfortunately, the backoff efficiency of real Doherty PAs is lowered by unavoidable losses. The purpose of this work is to study the potential of re-gaining some of this efficiency loss through nonlinear drive-curve design for dual-input Doherty PAs. Several drive characteristics are compared in terms of efficiency and linearity performance measured with a modulated signal and applying digital pre-distortion. A single-parameter drive-curve model suitable for analog implementation is proposed that allows the adjustment of the efficiency/linearity tradeoff.

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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
2016 IEEE MTT-S International Microwave Symposium, IMS 2016
volume
2016-August
publisher
Institute of Electrical and Electronics Engineers Inc.
conference name
2016 IEEE MTT-S International Microwave Symposium, IMS 2016
external identifiers
  • scopus:84984941846
ISBN
9781509006984
DOI
10.1109/MWSYM.2016.7540167
language
English
LU publication?
yes
id
9cce8fd0-e071-4b6c-a7f3-9b8635ba893c
date added to LUP
2016-12-07 12:44:11
date last changed
2017-02-26 04:43:35
@inproceedings{9cce8fd0-e071-4b6c-a7f3-9b8635ba893c,
  abstract     = {<p>Doherty power amplifiers (PAs) can achieve high efficiency with modulated signals since they exhibit an efficiency-peak in backoff that can, in theory, reach full-scale efficiency. Unfortunately, the backoff efficiency of real Doherty PAs is lowered by unavoidable losses. The purpose of this work is to study the potential of re-gaining some of this efficiency loss through nonlinear drive-curve design for dual-input Doherty PAs. Several drive characteristics are compared in terms of efficiency and linearity performance measured with a modulated signal and applying digital pre-distortion. A single-parameter drive-curve model suitable for analog implementation is proposed that allows the adjustment of the efficiency/linearity tradeoff.</p>},
  author       = {Singerl, Peter and Magesacher, Thomas},
  booktitle    = {2016 IEEE MTT-S International Microwave Symposium, IMS 2016},
  isbn         = {9781509006984},
  language     = {eng},
  month        = {08},
  publisher    = {Institute of Electrical and Electronics Engineers Inc.},
  title        = {Drive-characteristic design for dual-input Doherty power amplifiers},
  url          = {http://dx.doi.org/10.1109/MWSYM.2016.7540167},
  volume       = {2016-August},
  year         = {2016},
}