High Efficiency Power Amplifiers for Modern Mobile Communications: The Load-Modulation Approach

被引：30
作者：
Ramella, Chiara [1 ]
Piacibello, Anna [1 ]
Quaglia, Roberto [2 ]
Camarchia, Vittorio [1 ]
Pirola, Marco [1 ]
机构：
[1] Politecn Torino, Dept Elect & Telecommun, I-10129 Turin, Italy
[2] Cardiff Univ, Ctr High Frequency Engn, Cardiff CF10 3AT, S Glam, Wales
来源：
ELECTRONICS | 2017年 / 6卷 / 04期
关键词：
high power amplifiers; high frequency transmitters; wireless communications; high efficiency; Doherty power amplifier; Chireix outphasing amplifier; load modulated balanced amplifier; CREST FACTOR REDUCTION; DOHERTY AMPLIFIER; BROAD-BAND; LINEAR AMPLIFICATION; ENHANCED EFFICIENCY; DESIGN; COMPENSATION; ARCHITECTURE; TECHNOLOGY; BANDWIDTH;
D O I：
10.3390/electronics6040096
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
Modern mobile communication signals require power amplifiers able to maintain very high efficiency in a wide range of output power levels, which is a major issue for classical power amplifier architectures. Following the load-modulation approach, efficiency enhancement is achieved by dynamically changing the amplifier load impedance as a function of the input power. In this paper, a review of the widely-adopted Doherty power amplifier and of the other load-modulation efficiency enhancement techniques is presented. The main theoretical aspects behind each method are introduced, and the most relevant practical implementations available in recent literature are reported and discussed.
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页数：29
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