Title :
PZT-based stacked acoustic filters
Author :
Kosinski, J. ; Baidy, E. ; Shannon, J. ; Safari, A. ; Ballato, A.
Author_Institution :
US Army Electron Technol. & Devices Lab., Ft. Monmouth, NJ, USA
fDate :
30 Aug-2 Sep 1992
Abstract :
Stacked acoustic filters exhibiting less than 1-dB insertion loss corresponding to passband efficiencies as high as 86% have been demonstrated. The best results to date have been obtained with half-wavelength-thick ground planes, Ag-epoxy adhesive, and high-Q (hard) PZT (lead zirconate titanate) transducers. Results indicate that further improvements can be achieved through a combination of lower-loss materials and more accurate fabrication. Filter structures developed here have demonstrated high RF power handling capability on the order of 5 W/cm2 of transducer area. The prototype PZT-based stacked acoustic filters exhibit 30% RF bandwidth
Keywords :
acoustic filters; lead compounds; piezoelectric transducers; ultrasonic transducers; 1 dB; 86 percent; Ag-epoxy adhesive; PZT; PZT-based stacked acoustic filters; PbZrO3TiO3; RF bandwidth; half-wavelength-thick ground planes; high RF power handling capability; high-Q; insertion loss; passband efficiencies; transducers; Acoustic devices; Acoustic materials; Acoustic transducers; Band pass filters; Bandwidth; Electrodes; Frequency; Insertion loss; Piezoelectric transducers; Resonator filters;
Conference_Titel :
Applications of Ferroelectrics, 1992. ISAF '92., Proceedings of the Eighth IEEE International Symposium on
Conference_Location :
Greenville, SC
Print_ISBN :
0-7803-0465-9
DOI :
10.1109/ISAF.1992.300686
