Improving Power Amplifier Efficiency and Linearity Using a Dynamically Controlled Tunable Matching Network | Health & Environmental Research Online (HERO)

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Citation
Tags

HERO ID

2587960

Reference Type

Journal Article

Title

Improving Power Amplifier Efficiency and Linearity Using a Dynamically Controlled Tunable Matching Network

Author(s)

Fu, JiaS; Mortazawi, A

Year

2008

Is Peer Reviewed?

Yes

Journal

I E E E Transactions on Microwave Theory and Techniques
ISSN: 0018-9480

Volume

Issue

Page Numbers

3239-3244

DOI

10.1109/TMTT.2008.2007094

Web of Science Id

WOS:000261895700029

Abstract

This paper presents a tunable matching network that enhances both efficiency and linearity of power amplifiers (PAs). A medium-power amplifier with a varactor-based matching network is designed, fabricated, and tested. It is demonstrated that not only the power efficiency at reduced drive levels can be improved but also the AM-AM and AM-PM distortions of the PA are reduced when the tunable matching network is biased according to the input drive level. Moreover, under 3GPP WCDMA modulated input, the PA with a dynamically controlled tunable matching network achieves tip to 5% improvement in drain efficiency when compared with a PA employing a fixed matching network.

Keywords

Efficiency; linearity; power amplifiers (PAs); tunable matching networks