Systematic approach for integration of offset radar fascia in product development Process

ADAS is becoming more agile and customer adaptive technology now a days in the automotive domain.Under ADAS, Autonomous emergency braking (AEB), Adaptive cruise control systems (ACC) are used in automotive vehicles to provide drivers with enhanced features including controlling the vehicle speed and maintaining a safe distance with a vehicle ahead, thus also maintaining a desired speed, and at times accelerating the vehicle under clear lane conditions or decelerating it on sudden detection of a vehicle in front.Most of these systems use radars for measuring the distance of the vehicle in front, and its relative speed, and, if required, the directional angle of the front vehicle.Radar systems emit and receive radio waves, which have low penetration capabilities within the metallic/chrome materials commonly used in automotive emblems or badges (Mascots).Therefore, the exact location for mounting the radar fascia with respect to the radar systems is crucial and is driven by many parameters.One concern is to retain the stylish and aesthetic appeal of the vehicle front, and thus, the automotive radar systems are typically mounted behind fascia material to make them invisible to the customers.This also keeps their functionality substantially unaffected by environmental factors.Another concern is how compatible the radar with the fascia material is that it is mounted behind the fascia.The fascia and the badge/mascot can intercept the emitted and received radar beams, and this interception could obstruct the radar beams, especially if the fascia is made of any metallic material, or if the badge is not otherwise designed to support the radar beams.Attempts have been made by automotive companies to develop radar compatible badges that are substantially flat, and non-metallic, so that the radar beams pass through them with minimal interruption.However, due to constraints like maintaining the styled appearance, size and aesthetic appeal of some vehicle fascia, some manufacturers' fasciae are not easily designed to be compatible with radar beams.Designing such a fascia to make it compatible with radar beams is difficult.Also, many times it's not possible to maintain and package the radar exactly at the center of the vehicle (Y0) location because of the technical, packaging requirements and or vehicle performance challenges and for the specific vehicle appearance or design requirements.Therefore, there exists a need for a unique design fascia that can be positioned within the radar beam projection and still be functional within the radar system.