Volker Winkler, Reinhard Feger, Linus Maurer,
"Automotive Short Range Radar Sensor based on the 79GHz Single-Chip ATRX-Transceiver-Family"
: Proc. 5th European Radar Conf., Seite(n) 1616-1619, 10-2008
Automotive Short Range Radar Sensor based on the 79GHz Single-Chip ATRX-Transceiver-Family
Sprache des Titels:
Proc. 5th European Radar Conf.
Today automotive short range radar sensors are
only available for the 24GHz band. But in the EU the production
of ultra-wideband sensors is limited to 2013. This was the
impact to develop a single-chip SiGe RF-transceiver on Infineon’s
B7HF200-Process with transition frequencies above 200GHz. The
spectral density limit of -9 dBmMHz for the 79GHz-band is
much higher than the -41.3 dBmMHz limit for 24GHz. Therefore
the built prototype is a FMCW radar and no pulse radar in
order to achieve a higher Signal-to-Noise Ratio. The required
frequency ramp generation according to the FMCW-Principle
is realized without a Phase Locked Loop(PLL), but by controlling
digitally the tuning voltage of the VCO with help of
a D/A-converter. The non-linearity of the VCO tuning law is
compensated by measuring the frequency of the divider signal.
Two bistatic transceiver variants have been realized: ATRX2
has one transmitter and three receive channels, while ATRX3
has two switchable transmitters and two receivers. An RF-board
has been designed for each chip, where low-cost patch antennas
have been applied optimized for a short range system. The angle
detection works according to the phase monopulse principle. In
the following the configuration for both chips is explained and
measurement results are presented in order to demonstrate the
angle detection capabilities.