Title :
Acoustic-field distribution within a fan-shaped filter
Author :
Dufilie, Pierre ; Kopp, Laurent ; Knuuttila, Jouni V. ; Vartiainen, Juha ; Salomaa, Martti M.
Author_Institution :
Thales Components, Vernon, CT, USA
Abstract :
We have investigated the surface-acoustic wave field variation in a fan-shaped filter on a 112° LiTaO3 substrate as a function of position and frequency. The acoustic field has been measured with the help of a scanning laser interferometer and the SAW-field distribution in the complete filter has also been numerically simulated in detail. Our modelling scheme utilizes a discretization of the filter into elementary cells. The simulations serve to render features of the acoustic-field distribution in astonishing quantitative agreement with the laser-interferometric detections
Keywords :
acoustic field; light interferometry; lithium compounds; surface acoustic wave filters; LiTaO3; LiTaO3 substrate; SAW device; acoustic field distribution; fan-shaped filter; numerical simulation; scanning laser interferometry; Acoustic measurements; Acoustic transducers; Filters; Frequency; Laser modes; Passband; Physics; Piezoelectric transducers; Surface acoustic wave devices; Surface acoustic waves;
Conference_Titel :
Ultrasonics Symposium, 2001 IEEE
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-7177-1
DOI :
10.1109/ULTSYM.2001.991574
