This paper looks at a new 77 GHz adaptive cruise control (ACC) radar transceiver design, which has placed considerable emphasis on low parts count, ease of assembly and test, excellent performance over temperature and ease of system integration. Unlike the currently available 77 GHz transceivers, which use either a cavity Gunn diode voltage controlled oscillator (VCO) or a monolithic microwave integrated circuit (MMIC) chip set for the signal source, this unit uses a novel graded gap Gunn diode (G3D) planar VCO technology. This approach is inherently low cost as the 77 GHz oscillator is assembled into the module as a small (10x10x4mm), hermetically packaged device. The millimetre wave section of the module was built on low dielectric constant softboard, which fits into a metal housing, which is 50x45x15mm excluding the waveguide feed. The operation and fabrication of the Gunn diode is discussed as well as a description of the physics behind a frequency modulated continuous wave (FMCW) radar sensor.
A compact 77GHz transceiver module using G3D diode technology for automotive applications
Ein kompaktes 77 GHz-Übertragungsmodul mit Hilfe der G3D-Diodentechnologie für den Einsatz im Kfz
2003
13 Seiten, 11 Bilder
Conference paper
English
A Compact 77GHz Transceiver Module Using G3D Diode Technology for Automotive Applications
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