Product category:
Frequency Control Components
News Release from: Murata Electronics (UK) | Subject: SAW resonators and filters
Edited by the Electronicstalk Editorial
Team on 24 October 2005
SAW devices extend to higher frequencies
Murata is offering a wide range of compact SAW resonators and filters for use at higher frequencies.
Rapid growth in the telecomms, mobile comms and digital wireless products markets has resulted in increased demand for the compact integration of RF and allied circuitry with high speed digital devices In response to this trend, Murata is offering a wide range of compact SAW resonators and filters for use at higher frequencies
This article was originally published on Electronicstalk on 4 Jul 2008 at 8.00am (UK)
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These devices are part of a broader range of frequency control products now available.
Murata's SAW filters are available immediately, in production volumes, for a range of applications in the telecomms, mobile comms and consumer markets, including digital cellular, cordless phone, TV-tuner (analogue), TV-tuner (digital), remote keyless entry (RKE), RFID and GPS applications.
For RKE applications, operating at 434MHz in Europe and the US, Murata offers a number of devices in the SAFCC433 range with either wide- or narrowband 433.92MHz centre frequency.
Further reading
Ceramic thermistors protect modern supplies
Murata's PRF series of ceramic thermistors increase their resistance very sharply when exposed to temperatures over a certain level.
Capacitors tolerate high temperatures
The HiCap series is available with capacitance values of up to 100uF in case sizes from 01005 to 1210, with either X7R, X7S or X7U temperature coefficients.
The narrow bandwidth (3dB) part, for example, is specified at +/-250kHz.
Devices feature high selectivity and low loss characteristics.
Designers working on RFID designs will be interested in the SAFCH869 and SAFCH864 filters.
The first is a wide bandwidth part (+/-5MHz), featuring high attenuation at the image point.
Insertion loss is quoted at 4.5dB maximum at 869MHz (+/-1MHz) centre frequency.
The second is also a wide bandwidth (3dB) part, specified at +/-5MHz.
For the GPS arena, Murata has several offerings in the SAFSE1G57 range, with versions featuring low insertion loss, high attenuation, extended temperature range for automotive applications and centre frequencies of 1575.5 or 1575.42MHz.
A 100ohm balanced SAW filter is also available, together with the SAFCC110M IF filter.
SAW resonators for RKE applications come with centre frequencies of 304, 312, 314, 315, 418, 423, 433, 434 or 868MHz.
To give typical examples from the range, insertion loss for the 315MHz device is 2.2dB and 2.5dB for the 433MHz part.
Low loss versions are available with 303 and 315MHz centre frequencies.
For TPMS applications, parts include 315MHz, including a low loss version and 433MHz.
Most parts can be selected with a choice of initial tolerance of +/-50, +/-75 or +/-100kHz.
These resonators are also suitable for a range of allied applications including: datalinks, wireless security systems, automated meter readers, RFID tags, medical equipment, and sports and performance monitoring devices.
High reliability resonators are available which have undergone stringent environmental and mechanical testing.
Murata's SAW filters are supplied on reels containing 1000, 2000, 4000, 5000 or 10,000 pieces.
Resonators are supplied reeled in volumes of 2000, 5000 or 10,000 pieces.
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