Broadband Highly Efficient Doherty Power Amplifiers

被引:10
作者
Zhou, Xin Yu [1 ]
Chan, Wing Shing [2 ]
Chen, Shichang [3 ]
Feng, Wen Jie [4 ,5 ]
机构
[1] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA
[2] City Univ Hong Kong, Dept Elect Engn, Kowloon, Hong Kong, Peoples R China
[3] Hangzhou Dianzi Univ, Microelect CAD Ctr, Minist Educ China, Key Lab RF Circuits & Syst, Xiasha High Educ Pk, Hangzhou 310018, Peoples R China
[4] South China Univ Technol, Sch Elect & Informat Engn, Guangzhou 510006, Peoples R China
[5] Nanjing Univ Sci & Technol, Dept Commun Engn, Nanjing 210094, Peoples R China
关键词
LOAD; DESIGN; NETWORK;
D O I
10.1109/MCAS.2020.3027221
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
Modern wireless communication systems with large bandwidth and high peak-to-average power ratios (PAPRs) have been and will continue to be in high demand. This puts a strain on the transmitter, which has to operate with its average power in the output back-off (OBO) region. The Doherty power amplifier (Doherty PA) was invented in 1936 as an alternative to the highly inefficient linear amplifiers used in radio transmitters. The Doherty PA has recently undergone a renaissance, becoming the PA architecture of choice for mobile radio base stations. The additional efficiency peak at the OBO point makes it ideal for high PAPR signals. However, the main drawback of conventional Doherty PAs is its narrow bandwidth, which significantly limits its applicability. Recently, broadband Doherty PAs have been realized using a technique called "post-matching" and have attracted much attention. In this paper, the operating principles of conventional and broadband Doherty PAs are reviewed, followed by an analysis of recently reported prototypes, current technical challenges, and application in 5G wireless communication systems. As a comparison, process technologies for the implementation of Doherty PAs are also surveyed.
引用
收藏
页码:47 / 64
页数:18
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