Title :
Bias Switching Amplifier Design and Linearization
Author :
Lee, Young Min ; Jeon, Hyun Jin ; Koo, Kyung Heon
Author_Institution :
Dept. of Electron. Eng., Incheon Univ., Incheon
Abstract :
This paper presents the design and linearization of high efficiency dual mode amplifier. A dual mode transmitter requires an amplifier which generates different output level for different applications. For WiBro, the output is 1 W at 2.3 GHz, and for wireless LAN, the output is less than 100 mW at 2.4 GHz, A bias switching amplifier is designed to get the higher efficiency at both applications With bias switching the amplifier shows the efficiency improvement of up to 25% point. This paper also shows the possibility of linearity improvement for the dual mode amplifier by using predistortion technique.
Keywords :
UHF amplifiers; broadband networks; wireless LAN; WiBro; dual mode amplifier; dual mode amplifiers; frequency 2.4 GHz; mode transmitters; power 1 W; power 100 mW; predistortion technique; switching amplifier design; wireless LAN; Baseband; Dual band; Envelope detectors; Linearity; Power amplifiers; Predistortion; Radio frequency; Radiofrequency amplifiers; Transmitters; Wireless LAN;
Conference_Titel :
Microwave Conference, 2007. APMC 2007. Asia-Pacific
Conference_Location :
Bangkok
Print_ISBN :
978-1-4244-0748-4
Electronic_ISBN :
978-1-4244-0749-1
DOI :
10.1109/APMC.2007.4554721
