Elastomer based microwave absorber materials drive ADAS forward

The Chomerics division of Parker Hannifin has announced CHO-MUTE 9005 and 9025 elastomer-based microwave absorber materials protect advanced driver assistance systems (ADAS) from electromagnetic interference (EMI). According to Parker Hannifin, this is a vital requirement for these increasingly essential systems.

ADAS must work effectively 100 per cent of the time, as any failure in blind spot detection or adaptive cruise control could have tragic results. CHO-MUTE 9005 and 9025 absorb EMI radiation and ensure data integrity, said the company.

Process-essential ADAS components, such as lane detection warning systems and back-up cameras, have become a critical element of the driving experience but while this technology fulfils a pivotal function in avoiding accidents or lessening the severity of those that do occur, it also introduces several engineering challenges.

Advanced sensor and radar assemblies deployed in the latest vehicles experience severe and relentless EMI from surrounding electronics, as well as EMI radiation from the sensor itself or assemblies. These effects can lead to data inaccuracies and compromise safety and reliability.

EMI shielding materials must offer high performance characteristics and design flexibility, as requirements during development are frequently ambiguous and expansive. Engineers should always anticipate a manufacturing modification. While there are various options for EMI protection, absorbers are particularly suitable for the higher frequencies found typically in automotive devices.

CHO-MUTE 9005 and 9025 elastomer-based microwave absorber materials present a user-friendly approach to the reduction of unwanted electromagnetic radiation from electronic equipment, said Chromerics, while minimising cavity-to-cavity cross coupling and microwave cavity resonances. In both cases, the material comprises a silicone elastomer matrix with ferrous filler material to provide RF absorption performance over a broadband frequency range from 500MHz to 18GHz. The absorbers are for use on top of EMI-radiating components or in cavities that house components causing EMI disturbances.

CHO-MUTE 9005 and 9025 provide automotive supply chain manufacturers with customisation options to meet any engineering specification. The materials are available in sheet stock of various thicknesses with or without pressure-sensitive adhesive. Customers can easily die-cut CHO-MUTE 9005 and 9025 for the empirical testing of absorption solutions or assembly into cavities, added Chromerics. Both materials have been tested and certified to the UL 94 V-0 flammability standard.


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