FBAR technology

In the FBAR technology ( english (thin) film bulk acoustic wave resonator ), by the company Agilent Technologies has developed are resonator elements on a silicon die implemented. The way it works is comparable to that of a surface acoustic wave filter (SAW filter), but with the difference that with FBAR technology, the acoustic waves propagate in the substrate (“bulk”).

Compared to the previous ceramic resonators, this technology has a lower insertion loss and significant savings potential in terms of the size of the components. Furthermore, this technology can be used to implement filters for frequencies from approx. 1  GHz .

The BAW filters emerge from this technology .

Web links

• Agilent press release , February 7, 2002.
• Avago Technologies FBAR filter [broken link]