Adaptive Methods to Preserve Power Amplifier Linearity under Antenna Mismatch Conditions

A. Bezooijen, van; R. Mahmoudi; A.H.M. Roermund, van

doi:10.1109/TCSI.2005.853254

Adaptive Methods to Preserve Power Amplifier Linearity under Antenna Mismatch Conditions

A. Bezooijen, van
, R. Mahmoudi
, A.H.M. Roermund, van

Integrated Circuits

Research output: Contribution to journal › Article › Academic › peer-review

33 Citations (Scopus)

419 Downloads (Pure)

Abstract

Under antenna mismatch conditions at high output power, voltage clipping (due to collector voltage saturation) is the main cause of power amplifier linearity degradation. To preservelinearity under mismatch three adaptive methods are presented that make use of the detected minimum collector peak voltage.This detected signal controls either the amplifier output power,load-line, or supply voltage. These concepts are generalized analytically,and calculated results compare well to simulations. Measurements demonstrate am error vector magnitude reduction of5% and an adjacent channel power ratio improvement of 10 d Bat a voltage standing wave ratio of 4 for an EDGE amplifier with adaptively controlled output power. These adaptive methods offer a cost and size effective alternative to the use of an isolator.

Original language	English
Pages (from-to)	2101-2108
Number of pages	7
Journal	IEEE Transactions on Circuits and Systems. I, Fundamental Theory and Applications
Volume	52
Issue number	10
DOIs	https://doi.org/10.1109/TCSI.2005.853254
Publication status	Published - 2005

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title = "Adaptive Methods to Preserve Power Amplifier Linearity under Antenna Mismatch Conditions",

abstract = "Under antenna mismatch conditions at high output power, voltage clipping (due to collector voltage saturation) is the main cause of power amplifier linearity degradation. To preservelinearity under mismatch three adaptive methods are presented that make use of the detected minimum collector peak voltage.This detected signal controls either the amplifier output power,load-line, or supply voltage. These concepts are generalized analytically,and calculated results compare well to simulations. Measurements demonstrate am error vector magnitude reduction of5\% and an adjacent channel power ratio improvement of 10 d Bat a voltage standing wave ratio of 4 for an EDGE amplifier with adaptively controlled output power. These adaptive methods offer a cost and size effective alternative to the use of an isolator.",

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T1 - Adaptive Methods to Preserve Power Amplifier Linearity under Antenna Mismatch Conditions

AU - Bezooijen, van, A.

AU - Mahmoudi, R.

AU - Roermund, van, A.H.M.

PY - 2005

Y1 - 2005

N2 - Under antenna mismatch conditions at high output power, voltage clipping (due to collector voltage saturation) is the main cause of power amplifier linearity degradation. To preservelinearity under mismatch three adaptive methods are presented that make use of the detected minimum collector peak voltage.This detected signal controls either the amplifier output power,load-line, or supply voltage. These concepts are generalized analytically,and calculated results compare well to simulations. Measurements demonstrate am error vector magnitude reduction of5% and an adjacent channel power ratio improvement of 10 d Bat a voltage standing wave ratio of 4 for an EDGE amplifier with adaptively controlled output power. These adaptive methods offer a cost and size effective alternative to the use of an isolator.

AB - Under antenna mismatch conditions at high output power, voltage clipping (due to collector voltage saturation) is the main cause of power amplifier linearity degradation. To preservelinearity under mismatch three adaptive methods are presented that make use of the detected minimum collector peak voltage.This detected signal controls either the amplifier output power,load-line, or supply voltage. These concepts are generalized analytically,and calculated results compare well to simulations. Measurements demonstrate am error vector magnitude reduction of5% and an adjacent channel power ratio improvement of 10 d Bat a voltage standing wave ratio of 4 for an EDGE amplifier with adaptively controlled output power. These adaptive methods offer a cost and size effective alternative to the use of an isolator.

U2 - 10.1109/TCSI.2005.853254

DO - 10.1109/TCSI.2005.853254

M3 - Article

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VL - 52

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JO - IEEE Transactions on Circuits and Systems. I, Fundamental Theory and Applications

JF - IEEE Transactions on Circuits and Systems. I, Fundamental Theory and Applications

IS - 10

ER -

Adaptive Methods to Preserve Power Amplifier Linearity under Antenna Mismatch Conditions

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