BAW Technologies for radiofrequency filters and duplexers

The growth of wireless communications worldwide has led to the emergence of several cellular wireless standards such as GSM, DCS, PCS and UMTS. These standards, together with the more recent wireless data systems, as WLAN standards, drive the development in the wireless domain. In order to obtain low-cost solutions, the optimal multi-standard terminal should be as simple and small as possible and should offer the integration of heterogeneous technologies. The advent of high-yield bulk acoustic wave (BAW) technology compatible with VLSI process, offers some new opportunities for radiofrequency (RF) circuit integration. In this talk, we detail issues concerning the implementation of BAW filters and duplexer and their potential impact on the RF receiver and transmitter performances.