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

被引：58

作者：

Fu, Jia-Shiang ^{[1
]}

Mortazawi, Amir ^{[1
]}

机构：

[1] Univ Michigan, Dept Elect Engn & Comp Sci, Ann Arbor, MI 48109 USA

来源：

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2008年 / 56卷 / 12期

基金：

美国国家科学基金会;

关键词：

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

D O I：

10.1109/TMTT.2008.2007094

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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.

引用

页码：3239 / 3244

页数：6

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