Symmetrical Doherty Power Amplifier With Extended Efficiency Range

被引：127
|
作者：
Ozen, Mustafa [1 ]
Andersson, Kristoffer [2 ]
Fager, Christian [1 ]
机构：
[1] Chalmers Univ Technol, Dept Microtechnol & Nanosci, SE-41296 Gothenburg, Sweden
[2] Ericsson Res AB, S-41756 Gothenburg, Sweden
来源：
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2016年 / 64卷 / 04期
关键词：
Combiner synthesis; Doherty power amplifier (PA); efficiency; BANDWIDTH;
D O I：
10.1109/TMTT.2016.2529601
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 symmetrical Doherty power amplifier (PA) with an extended efficiency range is proposed. This paper proves the existence of a class of symmetrical Doherty PAs having efficiency peaks for back-off levels larger than 6 dB. A design technique is developed that maintains the full voltage and current swings of both the main and auxiliary transistors. The concept is experimentally verified in a 1.95-GHz 25-W circuit demonstrator fabricated using identical GaN HEMT devices. An average power-added efficiency of 50% and adjacent power leakage ratio of -49 dBc is obtained with 9-dB peak-to-average power-ratio 20-MHz long-term evolution test signals.
引用
收藏
页码：1273 / 1284
页数：12
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