Installation Instructions

Title: Installation Specifications and User Manual, Radar
Sensor, 24 GHz
Doc. No. E E814702
INSTALLATION SPECIFICATION Rev. 000, Page 16 of 16
APPENDIX A
EFFECT OF PAINT
Depending upon the type of paint, number of coatings, base coats used, etc. the
attenuation of the radar signal was measured between 2 and 5 dB (corresponds to
reduction of coverage between 11 and 25%). Because attenuation has significant
impact on performance, prior inspection of the material and paint samples are
suggested. Autoliv can characterize painted fascia samples to determine the radar
signal loss effects. Autoliv sensor specifications assume a maximum signal loss (2-
way) of 4 dB due to fascia effects. Materials and paints that exhibit greater than 4 dB
loss will degrade the specified performance. As noted in 5.3.3 performance can be
optimized by proper control of the fascia material thickness and dielectric constant.