Three-band high-efficiency modulator for envelope tracking power amplifier using class-B push-pull amplifiers

Jiafeng Zhou; Kevin Morris; Gavin Watkins; Keiichi Yamaguchi

Three-band high-efficiency modulator for envelope tracking power amplifier using class-B push-pull amplifiers

Jiafeng Zhou^*
, Kevin Morris
, Gavin Watkins
, Keiichi Yamaguchi

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

5 Citations (Scopus)

Abstract

Envelope modulators for wideband and high- power envelope tracking or envelope elimination and restoration amplifiers are usually realized by combing a switching stage and a linear stage. The efficiency and bandwidth of the modulator is mainly limited by the linear stage. This paper proposes a method to improve the performance of the linear stage by adding another stage. The third stage is a push-pull amplifier biased in class-B mode. The push-pull amplifier can achieve a peak efficiency of 76%, and well above 60% over the envelope frequencies from 1MHz to 20MHz. By adding this push-pull amplifier, the three-band modulator can achieve a peak efficiency of 81% and an effective efficiency of 73% for 10MHz and 20MHz LTE signals with 30W output power. The linearity of the push-pull amplifier and the three-band modulator has been evaluated. The three-band modulator has also been tested by driving a class-E amplifier at 2.06GHz to validate the design

Original language	English
Title of host publication	European Microwave Week 2012: "Space for Microwaves", EuMW 2012, Conference Proceedings - 42nd European Microwave Conference, EuMC 2012
Pages	124-127
Number of pages	4
Publication status	Published - 2012
Event	2012 42nd European Microwave Conference, EuMC 2012 - Held as Part of 15th European Microwave Week, EuMW 2012 - Amsterdam, Netherlands Duration: 29 Oct 2012 → 1 Nov 2012

Conference

Conference	2012 42nd European Microwave Conference, EuMC 2012 - Held as Part of 15th European Microwave Week, EuMW 2012
Country/Territory	Netherlands
City	Amsterdam
Period	29/10/12 → 1/11/12

Keywords

class-B
class-E
envelope elimination and restoration
envelope modulator
Envelope tracking
PAE
power amplifiers
push-pull
SMPS

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@inproceedings{5260ae61c81d4f3e823d10eeb9a36071,

title = "Three-band high-efficiency modulator for envelope tracking power amplifier using class-B push-pull amplifiers",

abstract = "Envelope modulators for wideband and high- power envelope tracking or envelope elimination and restoration amplifiers are usually realized by combing a switching stage and a linear stage. The efficiency and bandwidth of the modulator is mainly limited by the linear stage. This paper proposes a method to improve the performance of the linear stage by adding another stage. The third stage is a push-pull amplifier biased in class-B mode. The push-pull amplifier can achieve a peak efficiency of 76\%, and well above 60\% over the envelope frequencies from 1MHz to 20MHz. By adding this push-pull amplifier, the three-band modulator can achieve a peak efficiency of 81\% and an effective efficiency of 73\% for 10MHz and 20MHz LTE signals with 30W output power. The linearity of the push-pull amplifier and the three-band modulator has been evaluated. The three-band modulator has also been tested by driving a class-E amplifier at 2.06GHz to validate the design",

keywords = "class-B, class-E, envelope elimination and restoration, envelope modulator, Envelope tracking, PAE, power amplifiers, push-pull, SMPS",

author = "Jiafeng Zhou and Kevin Morris and Gavin Watkins and Keiichi Yamaguchi",

year = "2012",

language = "English",

isbn = "9782874870279",

pages = "124--127",

booktitle = "European Microwave Week 2012: {"}Space for Microwaves{"}, EuMW 2012, Conference Proceedings - 42nd European Microwave Conference, EuMC 2012",

note = "2012 42nd European Microwave Conference, EuMC 2012 - Held as Part of 15th European Microwave Week, EuMW 2012 ; Conference date: 29-10-2012 Through 01-11-2012",

}

Zhou, J, Morris, K, Watkins, G & Yamaguchi, K 2012, Three-band high-efficiency modulator for envelope tracking power amplifier using class-B push-pull amplifiers. in European Microwave Week 2012: "Space for Microwaves", EuMW 2012, Conference Proceedings - 42nd European Microwave Conference, EuMC 2012., 6459232, pp. 124-127, 2012 42nd European Microwave Conference, EuMC 2012 - Held as Part of 15th European Microwave Week, EuMW 2012, Amsterdam, Netherlands, 29/10/12.

Three-band high-efficiency modulator for envelope tracking power amplifier using class-B push-pull amplifiers. / Zhou, Jiafeng; Morris, Kevin; Watkins, Gavin et al.
European Microwave Week 2012: "Space for Microwaves", EuMW 2012, Conference Proceedings - 42nd European Microwave Conference, EuMC 2012. 2012. p. 124-127 6459232.

Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

TY - GEN

T1 - Three-band high-efficiency modulator for envelope tracking power amplifier using class-B push-pull amplifiers

AU - Zhou, Jiafeng

AU - Morris, Kevin

AU - Watkins, Gavin

AU - Yamaguchi, Keiichi

PY - 2012

Y1 - 2012

N2 - Envelope modulators for wideband and high- power envelope tracking or envelope elimination and restoration amplifiers are usually realized by combing a switching stage and a linear stage. The efficiency and bandwidth of the modulator is mainly limited by the linear stage. This paper proposes a method to improve the performance of the linear stage by adding another stage. The third stage is a push-pull amplifier biased in class-B mode. The push-pull amplifier can achieve a peak efficiency of 76%, and well above 60% over the envelope frequencies from 1MHz to 20MHz. By adding this push-pull amplifier, the three-band modulator can achieve a peak efficiency of 81% and an effective efficiency of 73% for 10MHz and 20MHz LTE signals with 30W output power. The linearity of the push-pull amplifier and the three-band modulator has been evaluated. The three-band modulator has also been tested by driving a class-E amplifier at 2.06GHz to validate the design

AB - Envelope modulators for wideband and high- power envelope tracking or envelope elimination and restoration amplifiers are usually realized by combing a switching stage and a linear stage. The efficiency and bandwidth of the modulator is mainly limited by the linear stage. This paper proposes a method to improve the performance of the linear stage by adding another stage. The third stage is a push-pull amplifier biased in class-B mode. The push-pull amplifier can achieve a peak efficiency of 76%, and well above 60% over the envelope frequencies from 1MHz to 20MHz. By adding this push-pull amplifier, the three-band modulator can achieve a peak efficiency of 81% and an effective efficiency of 73% for 10MHz and 20MHz LTE signals with 30W output power. The linearity of the push-pull amplifier and the three-band modulator has been evaluated. The three-band modulator has also been tested by driving a class-E amplifier at 2.06GHz to validate the design

KW - class-B

KW - class-E

KW - envelope elimination and restoration

KW - envelope modulator

KW - Envelope tracking

KW - PAE

KW - power amplifiers

KW - push-pull

KW - SMPS

UR - https://www.scopus.com/pages/publications/84874637945

M3 - Conference Contribution (Conference Proceeding)

AN - SCOPUS:84874637945

SN - 9782874870279

SP - 124

EP - 127

BT - European Microwave Week 2012: "Space for Microwaves", EuMW 2012, Conference Proceedings - 42nd European Microwave Conference, EuMC 2012

T2 - 2012 42nd European Microwave Conference, EuMC 2012 - Held as Part of 15th European Microwave Week, EuMW 2012

Y2 - 29 October 2012 through 1 November 2012

ER -

Three-band high-efficiency modulator for envelope tracking power amplifier using class-B push-pull amplifiers

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Conference

Keywords

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