Title :
An MMIC linearized amplifier using active feedback
Author :
Pedro, J.C. ; Perez, J.
Author_Institution :
Dept. Electron. e Telecommun., Aveiro Univ., Portugal
Abstract :
Presents a single 2.4*2.4 mm/sup 2/ monolithic microwave integrated circuit (MMIC) chip which includes an L-band tuned MESFET main amplifier, and a nonlinear feedback path intended to improve its carrier-to-intermodulation margin, C/I. The circuit uses a novel 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 C/I improvement over a relative bandwidth of more than 12%.<>
Keywords :
MMIC; feedback; field effect integrated circuits; microwave amplifiers; L-band tuned MESFET main amplifier; MMIC linearized amplifier; active feedback; carrier-to-intermodulation margin; intermodulation distortion; nonlinear feedback path; relative bandwidth; small-area MESFET; Bandwidth; Feedback circuits; Intermodulation distortion; L-band; MESFET integrated circuits; MMICs; Microwave amplifiers; Microwave integrated circuits; Monolithic integrated circuits; Tuned circuits;
Conference_Titel :
Microwave Symposium Digest, 1993., IEEE MTT-S International
Conference_Location :
Atlanta, GA, USA
Print_ISBN :
0-7803-1209-0
DOI :
10.1109/MWSYM.1993.276934
