Abstract
Abstract. Hidden integration of 79 GHz sensors behind plastic and painted fascia represents a challenging task since both electromagnetic and car body design constraints have to be met. This paper compares different possibilities for low-cost integration of radar sensors. Based on a model for stratified media, a study of the most important parameters such as bandwidth, angle and tolerances is shown. Our results suggest that for plastic fascia, the requirements of future radar sensors can be met with low-cost matching. Even with metallic paints, the requirements imposed by modern 79 GHz radar sensors can be met under certain conditions.
Highlights
Automotive radar systems, first introduced on the customer market in the late 1990s, show a steady trend from comfort (Advanced Driver Assistance, short ADAS) to safety oriented vehicle functions (Active Safety, short AS)
Radarbased systems tend to address scenarios of growing complexity, targeting urban or city traffic rather than highway scenarios, which were the main application in recent years
As is clear from both theoretical investigations and from previous experience with 76 GHz radar systems, operation of these sensors behind painted, plastic fascia will lead to performance degradation if no optimization of the stratified radome structures is performed
Summary
Automotive radar systems, first introduced on the customer market in the late 1990s, show a steady trend from comfort (Advanced Driver Assistance, short ADAS) to safety oriented vehicle functions (Active Safety, short AS). In the European Union, a new frequency band from 77 to 81 GHz – the 79 GHz band – has been allocated to enable future ADAS and AS systems replacing the previously used 24 GHz ultrawide band radar sensors. Integration of 79 GHz sensors into modern cars represents a challenging task since electromagnetic and car body design constraints have to be met simultaneously. As is clear from both theoretical investigations and from previous experience with 76 GHz radar systems, operation of these sensors behind painted, plastic fascia will lead to performance degradation if no optimization of the stratified radome structures is performed.
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