Improved design techniques for the realization of linear power amplifiers for wireless transmitters

Author

Thornton, William T. ; Larson, Lawrence E.

Author_Institution

Dept. of Electr. Eng., California Univ., San Diego, La Jolla, CA, USA

fYear

1999

fDate

1999

Firstpage

151

Lastpage

155

Abstract

Improved power amplifier linearization techniques are required for next-generation wireless communications systems. An improved microwave feedforward amplifier (FFA) architecture has been developed, and applied to the 5.725 to 5.850 GHz ISM band (ISM-5700). This FFA is composed of a driver amplifier and a main amplifier, and the phase shift and attenuation functions are performed utilizing vector modulators. This FFA offers a 30 dB improvement in the third order carrier-to-intermodulation (C/I3) ratio performance at the rated output power level of 30 dBm and is the first demonstration of a 5 GHz FFA utilizing vector modulation

Keywords

feedforward; linearisation techniques; microwave power amplifiers; modulation; radio transmitters; 5.725 to 5.85 GHz; ISM band; ISM-5700; attenuation function; design techniques; driver amplifier; linear power amplifiers; main amplifier; microwave feedforward amplifier architecture; phase shift function; power amplifier linearization techniques; vector modulators; wireless transmitters; Bandwidth; Frequency; High power amplifiers; Nonlinear distortion; Power amplifiers; Power generation; Radio transmitters; Radiofrequency amplifiers; Telephone sets; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Mixed-Signal Design, 1999. SSMSD '99. 1999 Southwest Symposium on

Conference_Location

Tucson, AZ

Print_ISBN

0-7803-5510-5

Type

conf

DOI

10.1109/SSMSD.1999.768609

Filename

768609