Installation and Manual Documentation
Document date:
CC-DA/ESR1
CR5CPCCF
18 Feb 2020
Page:
14
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and passing on rights, with us. The valid issue of this template is filed in CC-DA process landscape.
2.
System description
2.1.
Vehicle integration interfaces
This chapter describes the requirements for all parts mounted in front or around the sensor, like
painted bumper, unpainted cover and emblem/radome, regarding RF integration at 77 GHz with
CR5Plus radar sensors. If these requirements are not met, the sensor performance can be
degraded.
Values are marked with t.b.c. or t.b.d. showing that they have to be confirmed or defined during
the development process.
As product development is an on-going process, we reserve the right to make amendments in
line with technical progress.
The radar sensor performance should be influenced as low as possible by the installation behind
a fascia. Therefore the two-way radar loss by the fascia should be as low as possible and the
reflection attenuation must fulfill the requirements listed below.
Vertical misalignment will cause additional attenuation reducing the maximum range.
Horizontal misalignment will cause reduced detection at higher azimuth angles.
Ghost target detection caused by interference signals of multiple reflection at fascia and metallic
parts of the vehicle must be avoided. A simulation can be offered to evaluate the risk and the
need of using absorber material to suppress this unwanted signal. Because the threshold of
detection is very low, a high attenuation is required. Plastic material can only achieve high enough
attenuation, if carbon black is added.
2.1.1.1.
Radar Cone
Radar Cone for PLUS Family
The radar cone describes the zone where the fascia has to be optimized. Any parts of the vehicle
inside the radar cone may influence the radar performance. Cables, brackets, bars etc. should
not touch the radar cone. The fascia in this zone may not have bends and edges as well as
changes in thickness or material or painting.
Based on the footprint on the top side of the radar PCB the cone is characterized by a vertical
and a horizontal opening angle. The footprint is centered regarding to the sensor housing. A CAD
model of the radar cone is available.
The footprint for radar cone has the following dimensions: (W x H) 55 mm x 55 mm
