Title :
Wide bandwidth thin film BAW filters
Author :
Lakin, K.M. ; Andrus, C.W. ; Belsick, J.R. ; McCarron, K.T. ; Thornhill, W.H.
Author_Institution :
TFR Technol. Inc., Bend, OR, USA
Abstract :
Wide bandwidth filters are of interest in current and emerging wireless and system applications for use in IF circuits or as front end filters. Filters for the new GPS M code and for wireless LAN are required to have bandwidths approaching 4% of center frequency. The paper describes design and fabrication methods for obtaining wide bandwidth filters for GPS and wireless LAN applications using coupled resonator filters. Experimental results are presented.
Keywords :
acoustic resonator filters; band-pass filters; crystal filters; radiofrequency filters; GPS M code; IF circuits; coupled resonator filters; front end filters; slacked crystal filter; thin film bulk acoustic wave resonator filter; wideband filters; wideband thin film BAW filters; wireless LAN; Bandwidth; Coupling circuits; Design methodology; Fabrication; Frequency; Global Positioning System; Resonator filters; Thin film circuits; Transistors; Wireless LAN;
Conference_Titel :
Ultrasonics Symposium, 2004 IEEE
Print_ISBN :
0-7803-8412-1
DOI :
10.1109/ULTSYM.2004.1417749
