Adaptively preserving power amplifier linearity under antenna mismatch

Adrianus van Bezooijen; Reza Mahmoudi; Arthur H.M. van Roermund

doi:10.1109/MWSYM.2004.1338865

Adaptively preserving power amplifier linearity under antenna mismatch

Adrianus van Bezooijen, Reza Mahmoudi, Arthur H.M. van Roermund

Integrated Circuits

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

24 Citations (Scopus)

Abstract

An adaptive method is proposed to preserve power amplifier linearity under severe antenna mismatch condition, as an alternative to an isolator. At high output power and mismatch conditions voltage clipping, due to collector voltage saturation of the bipolar power transistor, is demonstrated to be the main cause of distortion. Linearity degradation can be properly monitored by minimum voltage detection, which is used adaptively to control the gain of a pre-amplifier in order to prevent collector voltage clipping. Measurement results demonstrate a significant linearity improvement under severe mismatch conditions. For an EDGE power amplifier an EVM improvement of 5% and an ACPR improvement of 10dB have been obtained at 28.5 dBm output power and a VSWR of 4:1.

Original language	English
Title of host publication	IEEE MTT-S Int. Microwave Symposium Digest
Place of Publication	Piscataway
Publisher	Institute of Electrical and Electronics Engineers
Pages	1515-1518
Number of pages	4
ISBN (Print)	0-7803-8331-1
DOIs	https://doi.org/10.1109/MWSYM.2004.1338865
Publication status	Published - 2004
Event	2004 IEEE Radio Frequency Integrated Circuits Symposium (RFIC 2004) - Forth Worth, United States Duration: 6 Jun 2004 → 8 Jun 2004

Conference

Conference	2004 IEEE Radio Frequency Integrated Circuits Symposium (RFIC 2004)
Abbreviated title	RFIC 2004
Country/Territory	United States
City	Forth Worth
Period	6/06/04 → 8/06/04

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10.1109/MWSYM.2004.1338865

Cite this

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title = "Adaptively preserving power amplifier linearity under antenna mismatch",

abstract = "An adaptive method is proposed to preserve power amplifier linearity under severe antenna mismatch condition, as an alternative to an isolator. At high output power and mismatch conditions voltage clipping, due to collector voltage saturation of the bipolar power transistor, is demonstrated to be the main cause of distortion. Linearity degradation can be properly monitored by minimum voltage detection, which is used adaptively to control the gain of a pre-amplifier in order to prevent collector voltage clipping. Measurement results demonstrate a significant linearity improvement under severe mismatch conditions. For an EDGE power amplifier an EVM improvement of 5% and an ACPR improvement of 10dB have been obtained at 28.5 dBm output power and a VSWR of 4:1.",

author = "{van Bezooijen}, Adrianus and Reza Mahmoudi and {van Roermund}, {Arthur H.M.}",

year = "2004",

doi = "10.1109/MWSYM.2004.1338865",

language = "English",

isbn = "0-7803-8331-1",

pages = "1515--1518",

booktitle = "IEEE MTT-S Int. Microwave Symposium Digest",

publisher = "Institute of Electrical and Electronics Engineers",

address = "United States",

note = "2004 IEEE Radio Frequency Integrated Circuits Symposium (RFIC 2004), RFIC 2004 ; Conference date: 06-06-2004 Through 08-06-2004",

}

van Bezooijen, A, Mahmoudi, R & van Roermund, AHM 2004, Adaptively preserving power amplifier linearity under antenna mismatch. in IEEE MTT-S Int. Microwave Symposium Digest. Institute of Electrical and Electronics Engineers, Piscataway, pp. 1515-1518, 2004 IEEE Radio Frequency Integrated Circuits Symposium (RFIC 2004), Forth Worth, Texas, United States, 6/06/04. https://doi.org/10.1109/MWSYM.2004.1338865

Adaptively preserving power amplifier linearity under antenna mismatch. / van Bezooijen, Adrianus; Mahmoudi, Reza; van Roermund, Arthur H.M.
IEEE MTT-S Int. Microwave Symposium Digest. Piscataway: Institute of Electrical and Electronics Engineers, 2004. p. 1515-1518.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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T1 - Adaptively preserving power amplifier linearity under antenna mismatch

AU - van Bezooijen, Adrianus

AU - Mahmoudi, Reza

AU - van Roermund, Arthur H.M.

PY - 2004

Y1 - 2004

N2 - An adaptive method is proposed to preserve power amplifier linearity under severe antenna mismatch condition, as an alternative to an isolator. At high output power and mismatch conditions voltage clipping, due to collector voltage saturation of the bipolar power transistor, is demonstrated to be the main cause of distortion. Linearity degradation can be properly monitored by minimum voltage detection, which is used adaptively to control the gain of a pre-amplifier in order to prevent collector voltage clipping. Measurement results demonstrate a significant linearity improvement under severe mismatch conditions. For an EDGE power amplifier an EVM improvement of 5% and an ACPR improvement of 10dB have been obtained at 28.5 dBm output power and a VSWR of 4:1.

AB - An adaptive method is proposed to preserve power amplifier linearity under severe antenna mismatch condition, as an alternative to an isolator. At high output power and mismatch conditions voltage clipping, due to collector voltage saturation of the bipolar power transistor, is demonstrated to be the main cause of distortion. Linearity degradation can be properly monitored by minimum voltage detection, which is used adaptively to control the gain of a pre-amplifier in order to prevent collector voltage clipping. Measurement results demonstrate a significant linearity improvement under severe mismatch conditions. For an EDGE power amplifier an EVM improvement of 5% and an ACPR improvement of 10dB have been obtained at 28.5 dBm output power and a VSWR of 4:1.

U2 - 10.1109/MWSYM.2004.1338865

DO - 10.1109/MWSYM.2004.1338865

M3 - Conference contribution

SN - 0-7803-8331-1

SP - 1515

EP - 1518

BT - IEEE MTT-S Int. Microwave Symposium Digest

PB - Institute of Electrical and Electronics Engineers

CY - Piscataway

T2 - 2004 IEEE Radio Frequency Integrated Circuits Symposium (RFIC 2004)

Y2 - 6 June 2004 through 8 June 2004

ER -

Adaptively preserving power amplifier linearity under antenna mismatch

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