Effect of Signal PAPR on Efficiency of Envelope Tracking Power Amplifiers

被引：0
|
作者：
Yan, Jonmei J. [1 ]
Yoo, Chan-Sei [2 ]
Trask, Elizabeth M. [1 ]
Kim, Dongsu [3 ]
Asbeck, Peter M. [1 ]
机构：
[1] Univ Calif San Diego, La Jolla, CA 92093 USA
[2] Device Res Ctr, Electron Mater, Seongnam, South Korea
[3] Technol Inst, Korea Electron, Seongnam, South Korea
来源：
2013 ASIA-PACIFIC MICROWAVE CONFERENCE PROCEEDINGS (APMC 2013) | 2013年
关键词：
envelope tracking (ET); power amplifier; efficiency; crest factor; gallium nitride (GaN); peak-to-average power ratio (PAPR);
D O I：
暂无
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：
Although envelope tracking power amplifiers have significantly higher efficiency in back-off than constant supply Class AB amplifiers, there is nonetheless an impact of modulation peak-to-average power ratio (PAPR) on the overall system efficiency. This paper provides experimental results and analysis of efficiency of a GaN RF amplifier with peak power 100W under envelope tracking, as a function of PAPR over the range 6.5dB to 10dB. The analysis shows that the RF transistor knee voltage relative to its maximum drain voltage, and the output power of the envelope amplifier relative to its maximum output power, are major determinants of the efficiency roll-off.
引用
收藏
页码：860 / 862
页数：3
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