Design of Highly Efficient Load Modulation Transmitter for Wideband Cellular Applications

被引：35

作者：

Nemati, Hossein Mashad ^{[1
]}

Cao, Haiying ^{[1
]}

Almgren, Bjorn ^{[2
]}

Eriksson, Thomas ^{[3
]}

Fager, Christian ^{[1
]}

机构：

[1] Chalmers, Dept Microtechnol & Nanosci, SE-41296 Gothenburg, Sweden

[2] Ericsson AB, SE-16480 Stockholm, Sweden

[3] Chalmers, Dept Signals & Syst, SE-41296 Gothenburg, Sweden

来源：

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2010年 / 58卷 / 11期

关键词：

Digital predistortion (DPD); efficiency; 4G; GaN HEMT; LDMOS FET; linearization; load modulation; LTE; power amplifier (PA); POWER-AMPLIFIERS; MATCHING NETWORKS;

D O I：

10.1109/TMTT.2010.2077914

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：

In this paper, the high potential of varactor-based dynamic load modulation (DLM) techniques for wideband cellular applications is demonstrated. A systematic design procedure is proposed to ensure high-efficiency wideband performance. It incorporates harmonically tuned power amplifier (PA) concepts and tunable matching techniques in an integrated design. A DLM transmitter at 2.65 GHz with a peak output power of 6 W is designed using the proposed procedure. In order to investigate the wideband performance of the implemented demonstrator, WCDMA signals with scaled bandwidths are employed. The signal peak-to-average ratio is 7 dB and the same for all the experiments. For the 38.4-MHz signal, which has a corresponding channel bandwidth of > 40 MHz, an average power added-efficiency (PAE) of 44%, normalized mean square error (NMSE) of -35 dB, and adjacent channel leakage ratio (ACLR) of -43 dBc are measured.

引用

页码：2820 / 2828

页数：9

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