A HIGHLY LINEAR AND EFFICIENT THREE-WAY DOHERTY AMPLIFIER USING TWO-STAGE GaN HEMT CELLS FOR REPEATER SYSTEMS

被引：14
作者：
Lee, Yong-Sub [1 ]
Lee, Mun-Woo [1 ]
Kam, San-Ho [1 ]
Jeong, Yoon-Ha [1 ]
机构：
[1] Pohang Univ Sci & Technol, Dept Elect & Elect Engn, Pohang 790784, Gyungbuk, South Korea
来源：
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS | 2009年 / 51卷 / 12期
关键词：
Doherty amplifier; efficiency; GaN HEMT; linearity;
D O I：
10.1002/mop.24748
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：
In this article, we propose a highly, linear and efficient three-way Doherty amplifier using two-stage GaN HEMT cells for repeater systems. The driving cells are used as the predistortion circuit to improve linearity (is well as the gain stage. The main cells are optimized to achieve high efficiency at a large back-off Power. After gate bias optimization of the driving cells, the proposed three-way, Doherty amplifier with two-stage cells shows highly linear and efficient performance. (C) 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2895-2898, 2009: Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24748
引用
收藏
页码：2895 / 2898
页数：4
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