Murata advances its filter technology

Murata's has developed a Saw filter with high-power capability, meaning it can be used as a top filter, replacing two interstage filters with one component.

In addition, the filter's external matching circuit requires just two inductors.

This overall reduction in component count minimises a design's bill of materials and will be of particular benefit to OEMs making wireless consumer devices such as mobile phones.

The Saw filter (part number: SAFEA2G45AC0F00) has a nominal centre frequency of 2,450MHz, suitable for Bluetooth and WiFi systems.

Its high-power capability means it can be used directly after the power amplifier, replacing two separate interstage filters in the transmit and receive paths.

The resulting reduction in component count simplifies the design, lowers cost and saves space.

The filter can handle input signal levels of +27dBm for 500 hours at up to 85C, or +24dBm for 5,000 hours at up to 85C.

Voltage standing wave ratio (VSWR) is typically 1.4, with insertion loss typically 1.7dB.

Operating temperature is -30 to +85C.

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