Title :
A High Power Asymmetric Doherty Amplifier with Improved Linear Dynamic Range
Author :
Lee, Ju-Young ; Kim, Ji-Yeon ; Kim, Jong-Heon ; Cho, Kyoung-Joon ; Stapleton, Shawn P.
Author_Institution :
Dept. of Radio Sci. & Eng., Kwangwoon Univ., Seoul
Abstract :
An asymmetric high power extended Doherty amplifier, which has the extended peak efficiency over a 9-dB of output power and a linear dynamic range is presented in this paper. The power amplifier is designed by using two different LDMOS FET´s for W-CDMA base station applications. To realize the peak efficiency extension and a linear dynamic range, a two times larger peaking device compared to the main device, and an unequal power divider is used. This asymmetric Doherty amplifier obtained a measured P1dB of 49.8 dBm. An efficiency of 31.1 % and an ACLR of -35 dBc are achieved at 9 dB back-off point, respectively
Keywords :
MOSFET; code division multiple access; power amplifiers; LDMOS FET; W-CDMA base station; asymmetric Doherty amplifier; high power amplifier; linear dynamic range; unequal power divider; Dynamic range; FETs; High power amplifiers; Impedance; Multiaccess communication; Peak to average power ratio; Power amplifiers; Power dividers; Power engineering and energy; Power generation; Asymmetric Doherty; Efficiency extension; Power amplifier; linear dynamic range;
Conference_Titel :
Microwave Symposium Digest, 2006. IEEE MTT-S International
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-9541-7
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2006.249499
