期刊名称：International Journal of Electronics and Computer Science Engineering
电子版ISSN：2277-1956
出版年度：2012
卷号：1
期号：1
页码：147-152
出版社：Buldanshahr : IJECSE
摘要：A Doherty amplifier employing input signal envelope tracking technique. In the amplifier, gate bias of peaking amplifier is controlled according to the magnitude of the envelope. The performance of the microwave Doherty amplifier has been compared with class AB amplifier. DSP is used to dynamically adjust the gate bias of the auxiliary (peaking) amplifier at the rate of the signal envelope to obtain gain flatness. DSP is used as a digital predistortor to improve the overall linearity and efficiency
关键词：Adjacent channel leakage ratio (ACLR);Adjacent channel power ratio(ACPR); envelope tracking; ;microwave Doherty amplifier; power added efficiency (PAE); wideband code-division multiple access (WCDMA).
