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Miniature SAW Filters for Automotive Telematics

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As motor vehicles become increasingly equipped with more telematics applications, EPCOS SAW filters qualified to AEC-Q200 are pivotal components these systems. The expanded EPCOS product portfolio from TDK now includes filters in a chip-sized SAW package with a footprint of only 1.4 x 1.1 mm2. Telematics is important for road transport and also in on-board automotive systems. The list of technologies linking telecommunications and IT is growing for passenger cars and utility vehicles. They include satellite-based navigation-using systems such as GPS, Galileo, Glonass and mobile phones, as well as mobile-phone supported traffic guidance systems and Internet access inclusive of local services. Additional technologies are WLAN, emergency call systems such as eCall for use in the event of an accident, vehicle fleet management, car-to-X communications and toll systems. The overwhelming majority of telematics functions in cars have so far been limited to devices that can only receive information, such as GPS. With the additional use of mobile phones, however, more and more devices are being used that are capable of both transmission and reception. Application-specific SAW filters from EPCOS in various package sizes are particular ideally suited for such purposes.