Title :
Compact monolithic coplanar 94 GHz front ends
Author :
Haydl, W.H. ; Verweyen, L. ; Jakobus, T. ; Neumann, M. ; Tessmann, A. ; Krems, T. ; Schlechtweg, M. ; Reinert, W. ; Massier, H. ; Rudiger, J. ; Bronner, W. ; Hulsmann, A. ; Fink, T.
Author_Institution :
Fraunhofer Inst. for Appl. Solid State Phys., Freiburg, Germany
Abstract :
Fully integrated W-band 94 GHz heterodyne receivers in coplanar 0.15 /spl mu/m AlGaAs/InGaAs/GaAs PM-HEMT technology are described. The MMICs consist of a multistage low noise RF amplifier, a mixer, and an LO buffer amplifier. Balanced diode and single ended resistive HEMT mixers were investigated. A conversion gain of 13 dB and a DSB noise figure of 6.5 dB were obtained with a very compact 1/spl times/4 mm/sup 2/ front end MMIC, employing cascode amplifiers and balanced rat race diode mixer. The chip size is substantially less than that of any receiver chip published to date.
Keywords :
HEMT integrated circuits; III-V semiconductors; aluminium compounds; field effect MIMIC; gallium arsenide; indium compounds; integrated circuit noise; millimetre wave amplifiers; millimetre wave mixers; millimetre wave receivers; 0.15 micron; 13 dB; 6.5 dB; 94 GHz; AlGaAs-InGaAs-GaAs; DSB noise figure; III-V semiconductors; LO buffer amplifier; W-band; balanced diode mixers; balanced rat race diode mixer; cascode amplifiers; conversion gain; coplanar PM-HEMT technology; heterodyne receivers; mixer; multistage low noise RF amplifier; single ended resistive HEMT mixers; Bridge circuits; Circuit testing; Coplanar transmission lines; Diodes; Distributed parameter circuits; Gallium arsenide; HEMTs; Millimeter wave circuits; Millimeter wave technology; Radiofrequency amplifiers;
Conference_Titel :
Microwave Symposium Digest, 1997., IEEE MTT-S International
Conference_Location :
Denver, CO, USA
Print_ISBN :
0-7803-3814-6
DOI :
10.1109/MWSYM.1997.596561
