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'Smallest' SAW duplexers, filters work with W-CDMA bands

Posted: 24 Jul 2008 ?? ?Print Version ?Bookmark and Share

Keywords:SAW filter? SAW duplexer? W-CDMA?

SAW filter, duplexer

Fujitsu Media Devices has unveiled what it touts to be smallest SAW duplexers (for bands I, II, IV, V and VIII) for W-CDMA mobile phones and SAW filters for GSM (850, 900, 1800 and 1900) technology, using a hermetic seal structure.

The SAW duplexers measure 2mm x 1.6mm (with a maximum height of 0.5mm) and 2.5mm x 2mm (with a maximum height of 0.6mm). Single SAW filters (for GSM 850 and 900) are at 1.1mm x 0.9mm (with a maximum height of 0.5mm) and dual filters (for GSM 850 and 900, or 1800 and 1900) at 1.5mm x 1.1mm (with a maximum height of 0.5mm). The use of a hermetic seal structure has realized the smallest size while maintaining MSL1.

The SAW duplexers use a 50? unbalanced interface for the antenna and transmitter pins and a 100? balanced interface for the receiver pins. The SAW filter's input interface is 50?, unbalanced, and the output interface is 150?, balanced.

Sample prices for SAW filters and duplexers are $5 and $10, respectively. Fujitsu plans to produce ten million duplexers and twenty million filters per month beginning Q1 09.

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