An MMIC linearized amplifier using active feedback

Author

Pedro, J.C. ; Perez, J.

Author_Institution

Dept. Electron. e Telecommun., Aveiro Univ., Portugal

fYear

1993

fDate

14-15 June 1993

Firstpage

113

Lastpage

116

Abstract

A single 2.4-mm*2.4-mm MMIC (monolithic microwave integrated circuit) chip that includes an L-band tuned MESFET main amplifier and a nonlinear feedback path to improve its carrier-to-intermodulation margin (C/I) is discussed. The circuit uses the concept of amplifier intermodulation distortion (IMD) cancellation, in which a small-area MESFET-based linearizer is directly applied to the terminals of the main active device. The linearizer provides a 15-dB improvement of C/I, over a relative bandwidth of more than 12%.<>

Keywords

MMIC; Schottky gate field effect transistors; feedback; field effect integrated circuits; intermodulation; linearisation techniques; microwave amplifiers; IMD cancellation; L-band; MMIC; active feedback; carrier-to-intermodulation margin; intermodulation distortion; linearized amplifier; monolithic microwave integrated circuit; nonlinear feedback path; tuned MESFET main amplifier; Bandwidth; Feedback; Intermodulation distortion; L-band; MESFET circuits; MESFET integrated circuits; MMICs; Microwave amplifiers; Microwave integrated circuits; Monolithic integrated circuits;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave and Millimeter-Wave Monolithic Circuits Symposium, 1993. Digest of Papers., IEEE 1993

Conference_Location

Atlanta, GA, USA

Print_ISBN

0-7803-1322-4

Type

conf

DOI

10.1109/MCS.1993.247464

Filename

247464