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Due to their outstanding characteristics acoustic components, such as SAW and - later on - also BAW filters, have been key components in wireless communication systems from their very beginning. Regarding mobile radio handsets the primary field of application of acoustic components has moved to the RF front-end sections. Here, with the increasing demand for WCDMA-FDD capable mobile phones, duplexers,...
Integration of bulk acoustic wave (BAW) filters into W-CDMA mobile communication applications is of high interest, as the BAW technology allows for low-loss and high Q signal forming in these 2 GHz devices. During the design phase of low- loss BAW filters it is very important that we not only control the most major loss mechanisms, like metal conductivity and viscosity of piezo material. We also have...
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