Linearity Analysis of a 40 W Class-G-Modulated Microwave Power Amplifier

被引：0
|
作者：
Wolff, Nikolai [1 ]
Bengtsson, Olof [1 ]
Schmidt, Martin [2 ]
Berroth, Manfred [2 ]
Heinrich, Wolfgang [1 ]
机构：
[1] Ferdinand Braun Inst FBH, Leibniz Inst Hoechstfrequenztech, Berlin, Germany
[2] Univ Stuttgart, Inst Elekt & Opt Nachrichtentech, D-70174 Stuttgart, Germany
来源：
2015 10TH EUROPEAN MICROWAVE INTEGRATED CIRCUITS CONFERENCE (EUMIC) | 2015年
关键词：
RF power amplifier; supply modulation; class-G modulation; digital predistortion; linearity;
D O I：
暂无
中图分类号：
TP301 [理论、方法];
学科分类号：
081202 ;
摘要：
In this paper, a class-G power amplifier is presented. It consists of a discrete class-G supply modulator, which uses a GaN-HEMT for switching, connected to a 2.65 GHz power amplifier with 40 W peak power, specifically designed for class-G supply modulation. The focus of the paper is on evaluating this system in terms of the RF and the switching signal, the switching behavior, and linearity. A combination of a complex memory polynomial digital predistorter and lookup tables as well as class-G-optimized digital predistorter models is used to improve the linearity of the power amplifier. It is found that the Class-G modulation improves overall PAE by 10-15 %. It is shown that using dedicated digital predistortion the linearity the distortions caused by the modulator can be significantly reduced.
引用
收藏
页码：365 / 368
页数：4
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