20 December 2021
The minimum distance between the sensor radome and the fascia or any other part of the
vehicle may not be smaller than 5 mm tbc.
This is valid for fascia parts fulfilling the following requirements.
Figure: Minimum distance above sensor radome
Curvature of fascia for FR5CU
Curvature of the fascia may influence the radar performance, especially with low vertical tilt
angles. The minimum radius of the curvature shall be according to the following rules:
Fascia thickness up to 4 mm:
R > 500 mm, no significant influence expected
R < 500 mm, significant influence possible, has to be evaluated
R < 300 mm, significant influence expected, not recommended
Fascia thickness up to 8 mm:
R > 900 mm, no significant influence expected
R < 900 mm, significant influence possible, has to be evaluated
R < 700 mm, significant influence expected, not recommended
Reflection from outside the radar cone
Reflections from structures located outside the radar cone have to be avoided.
Furthermore interference signals picked up by the sensor antennas should be avoided by
keeping a minimum distance (d) of 5 mm to 10 mm for parts in front of the sensor.
Even with compliance to the radar cone, reflections at parts outside the radar cone may disturb
the received signal. Reflections at parts causing an interference signal to the receiving antenna
and reflections at parts getting to the receiving antenna after a second reflection at the fascia
(multipath reflection).
Closed surfaces of brackets and masks made of metal or high reflecting material need a tilt
angle being arranged that the reflection is not received by the receiving antennas of the sensor.
To Next Page
Loading...
