How to Design an Outphasing Power Amplifier with Digital Predistortion

被引：2
|
作者：
Kimura, Shigekazu [1 ]
Kawasaki, Toshio [1 ]
机构：
[1] Fujitsu, Kawasaki, Kanagawa 2128510, Japan
来源：
IEICE TRANSACTIONS ON ELECTRONICS | 2021年 / E104C卷 / 10期
关键词：
outphasing; Chireix combiner; power amplifier; high efficiency; predistortion; EFFICIENCY;
D O I：
10.1587/transele.2021MMI0006
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：
For improving the fifth-generation mobile communication system, a highly efficient power amplifier must be designed for the base station. An outphasing amplifier is expected to be a solution for achieving high efficiency. We designed a combiner, one of the key components of the outphasing amplifier, using a serial Chireix combiner and fabricated an amplifier with a GaN HEMT, achieving 70% or more high efficiency up to 9 dB back-off power in an 800 MHz band. We also fabricated a 2 GHzband outphasing amplifier with the same design. We applied digital predistortion (DPD) to control the balance of amplifying units in this amplifier and achieved an average efficiency of 65% under a 20 MHz modulation bandwidth.
引用
收藏
页码：472 / 479
页数：8
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