Title :
High dynamic range, high efficiency power amplifiers for wireless communications
Author :
Asbeck, Peter ; Larson, Larry ; Kimball, Don ; Zhao, Yu ; Wang, Feipeng ; Qiao, Dongjiang
Author_Institution :
Dept. of Electr. & Comput. Eng., La Jolla, CA, USA
Abstract :
This paper provides an overview of power amplifier architectures for high efficiency and linearity over a wide range of output power levels, as required in CDMA, WLAN and other mobile wireless applications. Envelope tracking and Doherty amplifiers are described and issues for their implementation with HBTs are discussed. Envelope tracking implementation issues are reviewed. A Doherty CDMA amplifier with high overall efficiency (averaged over output power levels) is presented.
Keywords :
code division multiple access; heterojunction bipolar transistors; microwave power amplifiers; mobile radio; wireless LAN; CDMA application; Doherty CDMA amplifier; Doherty amplifiers; HBT circuits; RF power amplifiers; WLAN application; envelope tracking; heterojunction bipolar transistor; mobile wireless application; wireless communications; Computer architecture; Dynamic range; High power amplifiers; Multiaccess communication; Operational amplifiers; Power amplifiers; Power generation; Probability distribution; Radiofrequency amplifiers; Wireless communication;
Conference_Titel :
Bipolar/BiCMOS Circuits and Technology Meeting, 2005. Proceedings of the
Print_ISBN :
0-7803-9309-0
DOI :
10.1109/BIPOL.2005.1555210
