Drive-characteristic design for dual-input Doherty power amplifiers

Peter Singerl; Thomas Magesacher

doi:10.1109/MWSYM.2016.7540167

Drive-characteristic design for dual-input Doherty power amplifiers

Peter Singerl, Thomas Magesacher

Department of Electrical and Information Technology

Infineon Technologies Austria AG

Research output: Chapter in Book/Report/Conference proceeding › Paper in conference proceeding › peer-review

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.

Original language	English
Title of host publication	2016 IEEE MTT-S International Microwave Symposium, IMS 2016
Publisher	IEEE - Institute of Electrical and Electronics Engineers Inc.
Volume	2016-August
ISBN (Electronic)	9781509006984
DOIs	https://doi.org/10.1109/MWSYM.2016.7540167
Publication status	Published - 2016 Aug 9
Event	2016 IEEE MTT-S International Microwave Symposium, IMS 2016 - San Francisco, United States Duration: 2016 May 22 → 2016 May 27

Conference

Conference	2016 IEEE MTT-S International Microwave Symposium, IMS 2016
Country/Territory	United States
City	San Francisco
Period	2016/05/22 → 2016/05/27

Subject classification (UKÄ)

Telecommunications

Access to Document

10.1109/MWSYM.2016.7540167

Cite this

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title = "Drive-characteristic design for dual-input Doherty power amplifiers",

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.",

author = "Peter Singerl and Thomas Magesacher",

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language = "English",

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booktitle = "2016 IEEE MTT-S International Microwave Symposium, IMS 2016",

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note = "2016 IEEE MTT-S International Microwave Symposium, IMS 2016 ; Conference date: 22-05-2016 Through 27-05-2016",

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Singerl, P & Magesacher, T 2016, Drive-characteristic design for dual-input Doherty power amplifiers. in 2016 IEEE MTT-S International Microwave Symposium, IMS 2016. vol. 2016-August, 7540167, IEEE - Institute of Electrical and Electronics Engineers Inc., 2016 IEEE MTT-S International Microwave Symposium, IMS 2016, San Francisco, United States, 2016/05/22. https://doi.org/10.1109/MWSYM.2016.7540167

Drive-characteristic design for dual-input Doherty power amplifiers. / Singerl, Peter; Magesacher, Thomas.
2016 IEEE MTT-S International Microwave Symposium, IMS 2016. Vol. 2016-August IEEE - Institute of Electrical and Electronics Engineers Inc., 2016. 7540167.

Research output: Chapter in Book/Report/Conference proceeding › Paper in conference proceeding › peer-review

TY - GEN

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AU - Magesacher, Thomas

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N2 - 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.

AB - 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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M3 - Paper in conference proceeding

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VL - 2016-August

BT - 2016 IEEE MTT-S International Microwave Symposium, IMS 2016

PB - IEEE - Institute of Electrical and Electronics Engineers Inc.

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Y2 - 22 May 2016 through 27 May 2016

ER -

Drive-characteristic design for dual-input Doherty power amplifiers

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