Title :
A W-band image-rejection downconverter
Author :
Chang, Kwo Wei ; Wang, Huei ; Ton, Thuy-Nhung ; Chen, Tzu-hung ; Tan, Kin L. ; Dow, Gee Samuel ; Hayashibara, G.M. ; Allen, Barry R. ; Berenz, John ; Liu, Po-Hsin ; Streit, Dwight C. ; Liu, Louis C T
fDate :
12/1/1992 12:00:00 AM
Abstract :
The design, fabrication, and evaluation of a W-band image-rejection downconverter based on pseudomorphic InGaAs-GaAs HEMT technology are presented. The image-rejection downconverter consists of a monolithic three-stage low-noise amplifier, a monolithic image-rejection mixer, and a hybrid IF 90° coupler with an IF amplifier. The three-stage amplifier has a measured noise figure of 3.5 dB, with an associated small signal gain of 21 dB at 94 GHz while the image-rejection mixer has a measured conversion loss of 11 dB with +10 dBm LO drive at 94.15 GHz. Measured results of the complete image-rejection downconverter including the hybrid IF 90° coupler and a 10 dB gain amplifier show a conversion gain of more than 18 dB and a noise figure of 4.6 dB at 94.45 GHz
Keywords :
MMIC; field effect integrated circuits; frequency convertors; high electron mobility transistors; 10 to 18 dB; 11 dB; 3.5 to 4.6 dB; 94 to 94.45 GHz; EHF; IF amplifier; InGaAs-GaAs; MM-wave type; W-band image-rejection downconverter; conversion loss; fabrication; hybrid IF 90° coupler; low-noise amplifier; monolithic image-rejection mixer; pseudomorphic HEMT technology; three stage LNA; Gain measurement; Gallium arsenide; HEMTs; Image converters; Indium gallium arsenide; Loss measurement; Low-noise amplifiers; MMICs; Noise figure; Noise measurement;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
