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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 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
and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
2016 IEEE MTT-S International Microwave Symposium, IMS 2016
volume
2016-August
article number
7540167
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
conference name
2016 IEEE MTT-S International Microwave Symposium, IMS 2016
conference location
San Francisco, United States
conference dates
2016-05-22 - 2016-05-27
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
2025-04-04 15:04:33
@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    = {{IEEE - 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}},
  doi          = {{10.1109/MWSYM.2016.7540167}},
  volume       = {{2016-August}},
  year         = {{2016}},
}