A BROADBAND INVERTED DOHERTY POWER AMPLIFIER FOR IEEE 802.11b/g WLAN APPLICATIONS

被引：2
|
作者：
Jin, Shilei [1 ]
Zhou, Jianyi [1 ]
Zhang, Lei [1 ]
机构：
[1] Southeast Univ, Sch Informat Sci & Engn, State Key Lab Millimeter Waves, Nanjing 210096, Peoples R China
来源：
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS | 2011年 / 53卷 / 03期
关键词：
inverted Doherty power amplifier; broadband; PAE; WLAN; HIGH-EFFICIENCY; PREDISTORTER;
D O I：
10.1002/mop.25785
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：
A broadband inverted Doherty power amplifier (IDPA) is proposed in this article. To achieve the tradeoff between efficiency and operation bandwidth, an optimized output matching network and offset lines are used to design the load network of the proposed power amplifier (PA). For experimental verification. a conventional IDPA and a class-AB biased balanced PA have been implemented, lit addition. a 64-QAM modulated signal with 24-MHz channel bandwidth are applied as excitation. According to experiment results, the proposed Doherty power amplifier can keep power-added efficiency (PA F) higher than 31% from 2.4 to 2.5 GHz with 0.5 dB output-power flatness at 27-dBm output power. The PAE of the proposed PA is 16.4% and 4.2% higher than the balanced PA and the conventional IDPA respectively. In addition. the linearity of the proposed PA is improved effectively. (c) 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:636-639, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25785
引用
收藏
页码：636 / 639
页数：4
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