The Eilm Bulk Acoustic Resonator, or FBAR, is a new technology which has been used in the design and fabrication of microwave filters. These filters exhibit a combination of low loss, small size, frequency and bandwidth not attainable by any other type of device. Using a piezoelectric film of zinc oxide as a high Q crystal resonator along with passive components it is possible to form an integrable, high performance bandpass filter .The range of center frequencies achievable is roughly 1 to 5 GHz using current resonator designs. The technique features potentially low cost (since the filters are fabricated by batch processing), and, perhaps most intriguing, the capability of being combined with more complex functions (such as a complete radar receiver) as part of a larger mask set. Other advantages are moderate power handling capability, good temperature stability, and high dynamic range.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.