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The electromagnetic interference between the conductive coating in heat reflecting automotive glass and vehicle electronics can limit the application of such technology. A number of methods are available to maintain electromagnetic compatibility and the function of RF electronics in the passenger compartment, while accruing the heat load reduction benefits of the coating. This paper provides detailed test data showing the antenna performance differences resulting from the conductive windshield transmission of RF signals.

Automotive manufacturers are requiring lightweight materials, including glazing materials to improve vehicle fuel economy mandates. Since windshields are one of the largest glazing surface areas, reducing the thickness of the glass in its construction can significantly provide weight savings opportunities. Automotive glazing design considerations must include overall glass strength, rigidity, acoustical, and solar performance, which are affected by changes of glass thicknesses. This paper will evaluate those design considerations in the lightweighting of windshield glazings. One important design consideration for the windshield position is the impact of debris from the environment. Lightweighting of glazings in this body position affects the way the construction reacts to an impact. Use of asymmetry in glass plies in a laminated construction can have a marked effect on the part’s impact performance and surface damage creation.