A Study on Highly Efficient Dual-Input Power Amplifiers for Large PAPR Signals

Atsushi YAMAOKA; Thomas M. HONE; Yoshimasa EGASHIRA; Keiichi YAMAGUCHI

doi:10.1587/transele.2021MMI0004

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A Study on Highly Efficient Dual-Input Power Amplifiers for Large PAPR Signals

Atsushi YAMAOKA, Thomas M. HONE, Yoshimasa EGASHIRA, Keiichi YAMAGUCHI

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Summary :

With the advent of 5G and external pressure to reduce greenhouse gas emissions, wireless transceivers with low power consumption are strongly desired for future cellular systems. At the same time, increased modulation order due to the evolution of cellular systems will force power amplifiers to operate at much larger output power back-off to prevent EVM degradation. This paper begins with an analysis of load modulation and asymmetrical Doherty amplifiers. Measurement results will show an apparent 60% efficiency plateau for modulated signals with a large peak-to-average power ratio (PAPR). To exceed this efficiency limitation, the second part of this paper focuses on a new amplification topology based on the amalgamation between Doherty and outphasing. Measurement results of the proposed Doherty-outphasing power amplifier (DOPA) will confirm the feasibility of the approach with a modulated efficiency greater than 70% measured at 10 dB output power back-off.

Publication: IEICE TRANSACTIONS on Electronics Vol.E104-C No.10 pp.506-515

Publication Date: 2021/10/01

Publicized: 2021/03/23

Online ISSN: 1745-1353

DOI: 10.1587/transele.2021MMI0004

Type of Manuscript: Special Section INVITED PAPER (Special Section on Microwave and Millimeter-Wave Technologies)

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Authors

Atsushi YAMAOKA
  Research & Development Center, Toshiba Corporation
Thomas M. HONE
  Research & Development Center, Toshiba Corporation
Yoshimasa EGASHIRA
  Research & Development Center, Toshiba Corporation
Keiichi YAMAGUCHI
  Research & Development Center, Toshiba Corporation

Keyword

Doherty amplifier, outphasing amplifier, Doherty-outphasing amplifier, base stations, multiple-input amplifier

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Atsushi YAMAOKA, Thomas M. HONE, Yoshimasa EGASHIRA, Keiichi YAMAGUCHI, "A Study on Highly Efficient Dual-Input Power Amplifiers for Large PAPR Signals" in IEICE TRANSACTIONS on Electronics, vol. E104-C, no. 10, pp. 506-515, October 2021, doi: 10.1587/transele.2021MMI0004.
Abstract: With the advent of 5G and external pressure to reduce greenhouse gas emissions, wireless transceivers with low power consumption are strongly desired for future cellular systems. At the same time, increased modulation order due to the evolution of cellular systems will force power amplifiers to operate at much larger output power back-off to prevent EVM degradation. This paper begins with an analysis of load modulation and asymmetrical Doherty amplifiers. Measurement results will show an apparent 60% efficiency plateau for modulated signals with a large peak-to-average power ratio (PAPR). To exceed this efficiency limitation, the second part of this paper focuses on a new amplification topology based on the amalgamation between Doherty and outphasing. Measurement results of the proposed Doherty-outphasing power amplifier (DOPA) will confirm the feasibility of the approach with a modulated efficiency greater than 70% measured at 10 dB output power back-off.
URL: https://globals.ieice.org/en_transactions/electronics/10.1587/transele.2021MMI0004/_p

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@ARTICLE{e104-c_10_506,
author={Atsushi YAMAOKA, Thomas M. HONE, Yoshimasa EGASHIRA, Keiichi YAMAGUCHI, },
journal={IEICE TRANSACTIONS on Electronics},
title={A Study on Highly Efficient Dual-Input Power Amplifiers for Large PAPR Signals},
year={2021},
volume={E104-C},
number={10},
pages={506-515},
abstract={With the advent of 5G and external pressure to reduce greenhouse gas emissions, wireless transceivers with low power consumption are strongly desired for future cellular systems. At the same time, increased modulation order due to the evolution of cellular systems will force power amplifiers to operate at much larger output power back-off to prevent EVM degradation. This paper begins with an analysis of load modulation and asymmetrical Doherty amplifiers. Measurement results will show an apparent 60% efficiency plateau for modulated signals with a large peak-to-average power ratio (PAPR). To exceed this efficiency limitation, the second part of this paper focuses on a new amplification topology based on the amalgamation between Doherty and outphasing. Measurement results of the proposed Doherty-outphasing power amplifier (DOPA) will confirm the feasibility of the approach with a modulated efficiency greater than 70% measured at 10 dB output power back-off.},
keywords={},
doi={10.1587/transele.2021MMI0004},
ISSN={1745-1353},
month={October},}

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TY - JOUR
TI - A Study on Highly Efficient Dual-Input Power Amplifiers for Large PAPR Signals
T2 - IEICE TRANSACTIONS on Electronics
SP - 506
EP - 515
AU - Atsushi YAMAOKA
AU - Thomas M. HONE
AU - Yoshimasa EGASHIRA
AU - Keiichi YAMAGUCHI
PY - 2021
DO - 10.1587/transele.2021MMI0004
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E104-C
IS - 10
JA - IEICE TRANSACTIONS on Electronics
Y1 - October 2021
AB - With the advent of 5G and external pressure to reduce greenhouse gas emissions, wireless transceivers with low power consumption are strongly desired for future cellular systems. At the same time, increased modulation order due to the evolution of cellular systems will force power amplifiers to operate at much larger output power back-off to prevent EVM degradation. This paper begins with an analysis of load modulation and asymmetrical Doherty amplifiers. Measurement results will show an apparent 60% efficiency plateau for modulated signals with a large peak-to-average power ratio (PAPR). To exceed this efficiency limitation, the second part of this paper focuses on a new amplification topology based on the amalgamation between Doherty and outphasing. Measurement results of the proposed Doherty-outphasing power amplifier (DOPA) will confirm the feasibility of the approach with a modulated efficiency greater than 70% measured at 10 dB output power back-off.
ER -