A Programmable Impedance Tuner With Finite SWRs for Load-Pull Measurement of Handset Power Amplifiers

被引：8

作者：

Bae, Younghwan ^{[1
]}

Kim, Unha ^{[2
,3
]}

Kim, Junghyun ^{[1
]}

机构：

[1] Hanyang Univ, Dept Elect & Syst Engn, Ansan 426791, Gyeong Gi, South Korea

[2] Seoul Natl Univ, Sch Elect Engn & Comp Sci, Seoul 151742, South Korea

[3] Seoul Natl Univ, INMC, Seoul 151742, South Korea

来源：

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2015年 / 25卷 / 04期

基金：

新加坡国家研究基金会;

关键词：

Impedance tuner; load-pull measurement; power amplifier (PA); programmable control;

D O I：

10.1109/LMWC.2015.2407154

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：

A novel coupler/reflection-type electronic impedance tuner is proposed with quantitative analysis. The tuner is divided into a magnitude part and a phase part, and the magnitude and phase of the tuner impedance can be controlled separately just with one design parameter, respectively, thus facilitating programmable control for constant magnitude and uniform phase distribution. The tuner with standing wave ratio (SWR) = 2.5 and 6 was implemented for 3G/4G handset low-band transmitter (Tx) power amplifier (PA) load-pull measurement. The fabricated tuner showed very uniform reflection coefficient distribution with magnitude deviations of less than 0.05/0.08 at SWR = 2.5/6 and phase deviations of less than 5 degrees. PA load-pull measurement result using the tuner showed good agreement with a mechanical tuner, thus verifying the practical usefulness of the proposed tuner.

引用

页码：268 / 270

页数：3

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