Optimization of feedforward amplifier power efficiency on the basis of drive statistics

被引：14

作者：

Larose, CL ^{[1
]}

Ghannouchi, FM ^{[1
]}

机构：

[1] Ecole Polytech, Grp Rech Avancees Microondes & Elect Spatiale Pol, Dept Genie Elect, Montreal, PQ H3C 3A7, Canada

来源：

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2003年 / 51卷 / 01期

基金：

加拿大自然科学与工程研究理事会;

关键词：

design methodology; feedforward amplifiers; linearization; microwave power amplifiers; power efficiency;

D O I：

10.1109/TMTT.2002.806946

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：

Among power amplifier linearization techniques, feedforward delivers the best performance, but at the cost of significant degradation in the amplifier's power efficiency. This paper details a procedure to design feedforward amplifiers for optimal dc-RF conversion efficiency. The procedure has the convenience of requiring only the power statistics of the driving signal, of being computationally efficient, and of lending itself to a highly intuitive graphical representation. The gains and normalized saturated output powers of the main and error amplifiers, as well as the various couplings, are optimized for a specified linearity and gain at the output of the system. The amplifier types and adaptation methods employed must be specified at the outset, but results are presented that begin to reveal the impact of these factors on efficiency and, thus, to demonstrate the investigative potential of the procedure.

引用

页码：41 / 54

页数：14

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