Efficiency Enhancement of A Broadband Sequential Power Amplifier Using Envelope Tracking

被引：0
|
作者：
Chen, Peng [1 ]
Quaglia, Roberto [1 ]
Lees, Jonathan [1 ]
Merrick, Brian M. [2 ]
Alt, Alexander [1 ]
Tasker, Paul J. [1 ]
机构：
[1] Cardiff Univ, Sch Engn, Cardiff, Wales
[2] Benetel Ltd, Dublin, Ireland
来源：
2020 INTERNATIONAL WORKSHOP ON INTEGRATED NONLINEAR MICROWAVE AND MILLIMETRE-WAVE CIRCUITS (INMMIC) | 2020年
基金：
英国工程与自然科学研究理事会;
关键词：
broadband; efficiency enhancement; envelope tracking; sequential power amplifier; VOLTERRA; DESIGN;
D O I：
10.1109/inmmic46721.2020.9160332
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：
This paper demonstrates the first realisation of a sequential power amplifier (SPA) with envelope tracking (ET). Composed of a 10 W main PA and a 23 W peaking PA, the 1.62.4 GHz SPA achieves more than 49% drain efficiency at 6 dB back-off across the band through modulating the main PA supply voltage. At 2 GHz, the ET SPA offers more than 45% efficiency at 10 dB back off. Moreover, the linearity of the ET SPA is measured with and without digital predistortion over the band. To the best of the authors' knowledge, this work is the first investigation where ET has been applied to the SPA.
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页数：3
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