Highly sensitive SAW resonators

16 September 2009 Telecoms, Datacoms, Wireless, IoT

The new range of SAW resonators from Epcos features greatly reduced tolerance around the centre frequency. Compared to predecessor types, it was narrowed down by 50% and is now only ±25 kHz at 433,92 MHz. The components are mounted on a quartz substrate in hermetically sealed packages and have a footprint of 3 x 3 mm. The permissible operating temperature lies between -45°C and +125°C.

The first types of the R990 (433,92 MHz) and R991 (315 MHz) series are suitable for high-precision wireless transmitters operating in the ISM bands, including automotive electronic applications such as remote keyless entry and tyre pressure monitoring systems. This allows transmitters to be configured with very narrow bands, which both increases the sensitivity of the receivers and reduces their susceptibility to interference. It also enables greater transmission ranges. The resonators satisfy the requirements of AEC-Q200.

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