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Compact monolithic coplanar 94 GHZ front ends

Kompakte monolithisch integrierte 94 GHz-Empfänger in Koplanartechnik


Koepf, G.A. ; Institute of Electrical and Electronics Engineers -IEEE-:
IEEE MTT-S International Microwave Symposium Digest 1997. Vol.3
Piscataway, NJ: IEEE Publ. Order Dept., 1997
ISBN: 0-7803-3814-6
ISBN: 0-7803-3815-4
International Microwave Symposium <1997, Denver/Colo.>
Fraunhofer IAF ()
coplanar receiver; diode-mixer; Diodenmischer; koplanarer Empfänger; millimeter wave; Millimeterwelle

Fully integrated W-band 94 GHz heterodyne receivers in coplanar 0.15 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*4 mm2 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.