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Bulk Acoustic Wave Resonators And Filters For Applications Above 2 GHz

From TriQuint Semiconductor, Inc.
 

 
Bulk acoustic wave (BAW) devices are of interest for applications at higher microwave frequencies above 2 GHz. As frequencies increase, BAW devices require thinner films, which decrease processing times and makes the technology more cost effective. However, the area of resonators and associated filters also decreases and begins to impact device performance and packaging requirements. This paper will summarize the technical requirements of BAW devices in the 2 to 20 GHz frequency range and show specific results for resonators, ladder filters, and stacked crystal filters operating up to 20 GHz. Bulk acoustic wave (BAW) devices are of interest for applications at higher microwave frequencies above 2 GHz. In the broader scope there are applications in RF instrumentation, sensors, radar systems, and optical networks. There are of course those wireless applications that cover a variety of frequency bands near and above 2 GHz such as the ISM bands at 2.4 GHz and 5.7 GHz.
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