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A 94 GHz single-chip FMCW radar module for commercial sensor applications

Ein monolithisch integriertes 94 GHz FMCW Radar Modul für den Einsatz in kommerziellen Sensor Anwendungen
: Tessmann, A.; Kudszus, S.; Feltgen, T.; Riessle, M.; Sklarczyk, C.; Haydl, W.


Hamilton, R. ; IEEE Microwave Theory and Techniques Society:
IEEE MTT-S International Microwave Symposium digest 2002. Vol.3 : June 2 - 7, 2002, Washington State Convention & Trade Center, Seattle, Washington
Piscataway, NJ: IEEE, 2002
ISBN: 0-7803-7239-5
ISBN: 0-7803-7240-9
International Microwave Symposium (IMS) <2002, Seattle/Wash.>
Conference Paper
Fraunhofer IAF ()
FMCW-Radar; MMIC; W-Band; GaAs; coplanar waveguide; koplanare Wellenleiter; injection molding; Spritzgießen; flip-chip packaging; Flip-chip Aufbautechnik

A single-chip 94 GHz frequency modulated continuous wave (FMCW) radar module has been developed for high resolution sensoring under adverse conditions and environments. The monolithic microwave integrated circuit (MMIC) includes a varactor tuned VCO with injection port, very compact transmit and receive amplifiers and a single-ended resistive mixer. To enable bidirectional operation of a single transmit-receive antenna a combination of a Wilkinson divider and a Lange coupler was integrated. The circuit features coplanar technology and cascode HEMTs for compact size and low cost. These techniques result in a particularly small over-all chip-size of only 2 x 3 mm2. The packaged 94 GHz FMCW radar sensor achieved a tuning range of 6 GHz, an output power of 1mW and a conversion loss of 5 dB. The RF performance of the radar module was successfully verified by real-time monitoring the time flow of a gas-assisted injection molding process.