Special plastic protects automotive radar sensors

November 23, 2020 //By Christoph Hammerschmidt
Special plastic protects automotive radar sensors
With Ultradur RX, BASF has developed a plastic especially for radar sensor applications in automobiles. Thanks to its resistance to spray water, oils and road salt, the material offers durable protection for sensor housings. In addition, the new material protects the sensitive electronics in the housings against disturbing electromagnetic waves from other vehicles.

The different variants of the Ultradur RX series are optimized for the absorption and reduction of interfering radiation in the range from 76 to 81 GHz. The material, a modified polybutylene terephthalate (PBT), is thus intended to provide a high level of protection for the sensitive electronics in the sensor housings. "This dielectric, optimised material solution meets the high standards for sensor components and is suitable for use as a rear housing cover or in applications behind the circuit board of a radar sensor," explains Dr. Erik Gubbels, R&D Ultradur expert from BASF's Performance Materials division.

With increasing electromagnetic interference in road traffic, it is crucial that the signals are not only reflected but absorbed and thus reduced. This is where the new material comes in. By suppressing interfering radar radiation, it is possible to better assign the signals to be received, which also means improved safety. As a functionalized plastic, Ultradur RX offers an alternative to metal housings and thus contributes to weight savings and thus to greater vehicle efficiency.

Since the absorption properties depend on geometric constraints, the right material must be selected for each individual application. According to BASF, the Ultradur RX portfolio offers the right solution for different situations and is commercially available now.

More information: https://www.plastics.basf.com/

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