Linearization of Power Amplifier using the Modified Feed Forward Method

Linearization of Power Amplifier using the Modified Feed Forward Method

Mohammad Reza Motavalli

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Klaus Solbach

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1 University of Qom

GJRE Volume 17 Issue G1

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A modified circuit for improving linearization of power amplifier based on the model of the Feed Forward circuit amplifier is proposed. With the help of mathematical model for the single power amplifier, the circuit is simulated and a demonstrator is fabricated and measured. complex Taylor series are used for modeling the power amplifier by the approximation of the amplitude transfer function and the leveldependence of the transmission-phase of the power amplifier. This can be understood as a simplified form of Volterra series. In our proof of concept experiment, we verified the concept but also found that the adjustment of the circuit is critically dependent on the drive conditions and linearization is achieved only for a narrow range of drive power. The proposed circuit in compared with the conventional Feed Forward amplifier in addition a significant increase in efficiency, to minimize the power of the distortion signal 3IMDproducts at high drive levels.

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Funding

No external funding was declared for this work.

Conflict of Interest

The authors declare no conflict of interest.

Ethical Approval

No ethics committee approval was required for this article type.

Data Availability

Not applicable for this article.

Mohammad Reza Motavalli. 2017. \u201cLinearization of Power Amplifier using the Modified Feed Forward Method\u201d. Global Journal of Research in Engineering - G: Industrial Engineering GJRE-G Volume 17 (GJRE Volume 17 Issue G1): .

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GJRE Volume 17 Issue G1
Pg. 33- 44

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Journal Specifications

Crossref Journal DOI 10.17406/gjre

Print ISSN 0975-5861

e-ISSN 2249-4596

Keywords

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Classification

GJRE-G Classification: FOR Code: 290501

Submission ReceivedDecember 11, 2016
RevisedDecember 11, 2016
Peer Review Double Blind
Handling Editor
Accepted December 31, 2016
Published January 15, 2017

Version of record

v1.2

Issue date

June 2, 2017

Language

English

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Total Score: 82

Country: Iran

Subject: Global Journal of Research in Engineering - G: Industrial Engineering

Authors: Mohammad Reza Motavalli, Klaus Solbach (PhD/Dr. count: 0)

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Publish Date: 2017 06, Fri

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Total Views: 3829

Total Downloads: 1668

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