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Document date:
Installation and Manual Documentation
FR5CPCCF
CC-DA/ESR1
08 Aug 2019
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
FR5plus radar sensors.
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
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