Experimental investigation on efficiency and linearity of microwave Doherty amplifier

Author

Youngoo Yang ; Jaehyok Yi ; Young Yun Woo ; Bumman Kim

Author_Institution

Dept. of Electron. & Electr. Eng., POSTECH, South Korea

Volume

2

fYear

2001

fDate

20-24 May 2001

Firstpage

1367

Abstract

We have investigated the microwave Doherty amplifier, testing for efficiency and linearity. For the experiment, a 1.4 GHz Doherty amplifier has been implemented using a silicon LDMOSFET. The Doherty amplifier-I (a combination of a class B carrier amplifier and a class C peaking amplifier) and the Doherty amplifier-II (a combination of a class AB carrier amplifier and a class C peaking amplifier) have been compared with class B and AB amplifiers, respectively, using single-tone, two-tone, and forward-link CDMA signals. It demonstrated the superior performance of Doherty amplifiers. The results provide a topology selection guide of the CDMA base station power amplifier to achieve both linearity and efficiency enhancements.

Keywords

MOSFET circuits; code division multiple access; microwave power amplifiers; 1.4 GHz; Si; base station; circuit topology; class AB carrier amplifier; class B carrier amplifier; class C peaking amplifier; efficiency; forward-link CDMA signal; linearity; microwave Doherty amplifier; power amplifier; silicon LDMOSFET; single-tone CDMA signal; two-tone CDMA signal; Base stations; Circuits; Electromagnetic heating; High power amplifiers; Impedance; Linearity; Microwave amplifiers; Multiaccess communication; Operational amplifiers; Power amplifiers;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2001 IEEE MTT-S International

Conference_Location

Phoenix, AZ, USA

ISSN

0149-645X

Print_ISBN

0-7803-6538-0

Type

conf

DOI

10.1109/MWSYM.2001.967150

Filename

967150