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

fYear

2006

fDate

11-16 June 2006

Firstpage

1348

Lastpage

1351

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2006. IEEE MTT-S International

Conference_Location

San Francisco, CA

ISSN

0149-645X

Print_ISBN

0-7803-9541-7

Electronic_ISBN

0149-645X

Type

conf

DOI

10.1109/MWSYM.2006.249499

Filename

4015175