A High Efficiency 3.6-4.0 GHz Envelope-Tracking Power Amplifier Using GaN Soft-Switching Buck-Converter
A High Efficiency 3.6-4.0 GHz Envelope-Tracking Power Amplifier Using GaN Soft-Switching Buck-Converter
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采用 GaN 软开关降压转换器的高效 3.6-4.0 GHz 包络跟踪功率放大器
DOI：
10.1109/mwsym.2018.8439225
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
P. Asbeck
中科院分区：
文献类型：
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作者：
Y. Komatsuzaki;S. Lanfranco;Tapio Kolmonen;O. Piirainen;Jarno K. Tanskanen;Shuichi Sakata;R. Ma;S. Shinjo;K. Yamanaka;P. Asbeck
我们报道了一种高效的亚6 GHz宽带包络跟踪功率放大器(ET-PA)，它包括一个软开关降压转换器和一个宽带RF-PA，结合数字前端(DFE)环境用于信号产生和预失真。降压型转换器和射频功率放大器均采用0.15um GaN HEMT工艺制作。DFE可以产生降压转换器和RF-PA的输入信号，捕获输出信号用于反馈，并执行数字预失真(DPD)。采用20 MHz L TE信号，在3.6-4.0 GHz频段内，ET-PA的总效率为39.5-46.7%，输出功率为31.2-31.5dBm。在有DPD的情况下，ACLR值低于−45dBc，在3.6 GHz时总效率达到47%。据作者所知，这是迄今为止报道的ET-PA在该载波频率下的最高效率。
We report a high efficiency sub-6GHz wideband Envelope-Tracking Power Amplifier (ET-PA) including a soft-switching buck-converter and a wideband RF-PA, used in conjunction with a digital front end (DFE) environment for signal generation and predistortion. Both buck-converter and RF-P A were fabricated using an 0.15um GaN HEMT process. The DFE can generate the input signals for both buck-converter and RF-P A, capture the output signal for feed-back and perform digital predistortion (DPD). The overall ET-P A achieves total efficiency of 39.5–46.7% and output power of 31.2–31.5dBm over 3.6–4.0GHz with 20MHz L TE signals. With DPD, ACLR was below −45dBc with total efficiency reaching 47% at 3.6GHz. This, to the best of the authors' knowledge, is the highest efficiency yet reported for an ET-PA at this carrier frequency.