A high-efficiency linear polar transmitter for EDGE

被引：9
|
作者：
Lopez, Nestor D. [1 ]
Jiang, Xufeng [1 ]
Maksimovic, Dragan [1 ]
Popovic, Zoya [1 ]
机构：
[1] Univ Colorado, Dept Elect & Comp Engn, Boulder, CO 80309 USA
来源：
2008 IEEE RADIO AND WIRELESS SYMPOSIUM, VOLS 1 AND 2 | 2008年
关键词：
polar transmitter; polar modulation; class-E amplifier; envelope tracking;
D O I：
10.1109/RWS.2008.4463463
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 discusses a linear polar transmitter for EDGE signals with a total DC-to-RF efficiency of 56%. The transmitter is digitally-controlled, allowing for adjustments of delay, phase and amplitude. The amplifier is a 880-MHz class-E high-efficiency circuit with +20 dBm output power and a PAE of 70%. Two different supply modulators are compared: a 18% efficient linear envelope tracker and a 79% efficient switched-mode envelope tracker. The transmitter meets the EDGE spectral mask for both cases, showing that a high-efficiency amplifier can be linearized with a maintained high overall efficiency.
引用
收藏
页码：199 / 202
页数：4
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