Title :
An MMIC linearized amplifier using active feedback
Author :
Pedro, J.C. ; Perez, J.
Author_Institution :
Dept. Electron. e Telecommun., Aveiro Univ., Portugal
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;
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
DOI :
10.1109/MCS.1993.247464
