Linearized asymmetrical GaN Doherty power amplifier with 100 MHz instantaneous bandwidth at 3.5GHz

J. Xia, Mengsu Yang, Xiaowei Zhu
{"title":"Linearized asymmetrical GaN Doherty power amplifier with 100 MHz instantaneous bandwidth at 3.5GHz","authors":"J. Xia, Mengsu Yang, Xiaowei Zhu","doi":"10.1109/IMWS-BIO.2013.6756219","DOIUrl":null,"url":null,"abstract":"This paper presents a linearized Doherty power amplifier (PA) operating over 100 MHz instantaneous bandwidth at 3.5 GHz. To maintain high efficiency at large back-off output power and achieve improved load modulation, the Doherty PA is designed by using unequal sized GaN devices. An uneven power divider is also utilized to deliver more input power to the peaking amplifier. Experimental results show that, for a 100 MHz modulated signal, the Doherty PA can achieve the efficiency of 42% at about 9 dB back-off output power of 39.5 dBm. The adjacent channel leakage ratio is about -25 dBc and can be improved to about -47 dBc by using digital pre-distortion technique.","PeriodicalId":6321,"journal":{"name":"2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications (IMWS-BIO)","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"5","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2013 IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications (IMWS-BIO)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/IMWS-BIO.2013.6756219","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 5

Abstract

This paper presents a linearized Doherty power amplifier (PA) operating over 100 MHz instantaneous bandwidth at 3.5 GHz. To maintain high efficiency at large back-off output power and achieve improved load modulation, the Doherty PA is designed by using unequal sized GaN devices. An uneven power divider is also utilized to deliver more input power to the peaking amplifier. Experimental results show that, for a 100 MHz modulated signal, the Doherty PA can achieve the efficiency of 42% at about 9 dB back-off output power of 39.5 dBm. The adjacent channel leakage ratio is about -25 dBc and can be improved to about -47 dBc by using digital pre-distortion technique.
线性化非对称GaN Doherty功率放大器,在3.5GHz时具有100 MHz的瞬时带宽
本文提出了一种线性化的Doherty功率放大器(PA),其工作频率为3.5 GHz,瞬时带宽超过100 MHz。为了在大回退输出功率下保持高效率并实现改进的负载调制,Doherty PA采用不等尺寸的GaN器件进行设计。一个不均匀的功率分配器也被用来提供更多的输入功率到峰值放大器。实验结果表明,对于100 MHz的调制信号,Doherty放大器在39.5 dBm的回退输出功率约为9 dB时,效率可达42%。相邻通道泄漏比约为-25 dBc,通过数字预失真技术可提高到-47 dBc左右。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信