Title :
New orientations for bulk-acoustic-wave devices
Author :
Elias, Elizabeth ; Jhunjhunwala, Ashok
Author_Institution :
Dept. of Electr. Eng., Indian Inst. of Technol., Madras, India
fDate :
5/1/1990 12:00:00 AM
Abstract :
Several new materials/orientations for which strong BAW (bulk acoustic wave) response is predicted are presented. These new materials/orientations have much lower insertion losses and therefore present the possibility of superior BAW devices. The results also point out some correspondence between pseudo-SAW and bulk acoustic waves. The pseudo-SAW waves cannot theoretically exist in a semiinfinite piezoelectric half-space. The presence of a pseudo-SAW pole with high coupling coefficient (related to the residue of the pole) indicates a strong bulk wave being launched into the medium.<>
Keywords :
piezoelectric devices; ultrasonic devices; BAW devices; bulk-acoustic-wave devices; coupling coefficient; insertion losses; pseudo-SAW; semiinfinite piezoelectric half-space; Acoustic devices; Acoustic transducers; Acoustic waves; Bulk acoustic wave devices; Fingers; Frequency; Sociotechnical systems; Surface acoustic wave devices; Surface acoustic waves; Surface waves;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
