Envelope-tracking-based Doherty power amplifier

被引：3
|
作者：
Thian, Mury [1 ]
Gardner, Peter [1 ]
机构：
[1] Univ Birmingham, Dept Elect Elect & Comp Engn, Birmingham B15 2TT, W Midlands, England
来源：
INTERNATIONAL JOURNAL OF ELECTRONICS | 2010年 / 97卷 / 05期
关键词：
Doherty power amplifier; efficiency enhancement; envelope tracking; probability density function; RF and microwave electronics; HIGH-EFFICIENCY;
D O I：
10.1080/00207210903486831
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：
From the instantaneous efficiency plot, it is observed that the conventional 2-stage Doherty power amplifier (DPA) with high upper power dynamic range (>12 dB) suffers from a substantial dip in the middle of the upper power regime, thus reducing the average efficiency. In this study, an envelope-tracking-based DPA is proposed in order to minimise this dip by adjusting the drain bias voltage of the auxiliary amplifier of the DPA proportional to the input power level.
引用
收藏
页码：525 / 530
页数：6
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