A Highly Efficient Feed-Forward Doherty Amplifier with Improved Group-delay performance

摘要：

In this paper,a RF high power Dohertyfeed-forward amplifier using equal group-delay canceller isproposed which provide high efficiency and high linearity alsowith improved group-delay performance.The Dohertyamplifier takes Freescale mrf21125S N-channelEnhancement-Mode Lateral MOSFETs as the main amplifier ofa feed-forward amplifier.By carefully adjust the gate bias andthe phase offset line as well as through a 3dB hybridgroup-delay canceller,at the output of 25W the amplifierperforms with 44dB better adjacent channel leakage powerratio (ACLR),3.9％ higher power added efficiency (PAE)thanconventional Class-AB feed-forward amplifier.

关键词： Doherty amplifier Feed-forward Group-delay canceller ACLR PAE

作者: Zheng Qing Yan bo

作者单位: School of University of Electronic Science and Technology of China,Chengdu 610054,China

会议类型: 国际会议

会议名称: 2008 China-Japan Joint Microwave Conference(2008年中日微波会议)

会议地点: 上海

会议语种:英文

页码: 544-546

在线出版日期: 2008-09-10（万方平台首次上网日期，不代表论文的发表时间）