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

页码：199 / 202

页数：4

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