Title :
Single and double side grating devices built on thin quartz plates for the excitation of surface transverse waves
Author :
Ballandras, S. ; Gavignet, E. ; Bigler, E.
Author_Institution :
Lab. de Phys. et Metrol. des Oscillateurs, CNRS, Besancon, France
Abstract :
A theoretical study of Surface Transverse Waves (STW) properties propagating on piezoelectric plates of finite thickness is proposed. Both cases of single and double side grating are considered in the model. The mechanical and electrical boundary conditions are described and the validity of the assumption used for the model is discussed in regard with experimental results. These results have been obtained for 140 μm thick Z-cut plates and for 128 pm thick AT-cut plates with single-side aluminum strip gratings. Different delay lines have been fabricated. A relation between the theoretical dispersion curves exhibiting the existence of multiple frequency stopbands and the experimental frequency responses is emphasized. Also the frequency-temperature behaviour of a delay line built on a Z-cut plate has been measured
Keywords :
frequency response; quartz; surface acoustic wave delay lines; surface acoustic waves; ultrasonic dispersion; ultrasonic propagation; 128 micron; 140 micron; AT-cut plates; Al-SiO2; STW properties; SiO2; Z-cut plates; delay lines; dispersion curves; double side grating devices; electrical boundary conditions; finite thickness; frequency responses; frequency-temperature behaviour; mechanical boundary conditions; multiple frequency stopbands; piezoelectric plates; single side grating devices; single-side Al strip gratings; surface transverse waves; thin quartz plates; Aluminum; Boundary conditions; Delay lines; Equations; Frequency measurement; Gratings; Mechanical factors; Piezoelectric transducers; Strips; Surface waves;
Conference_Titel :
Ultrasonics Symposium, 1995. Proceedings., 1995 IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-2940-6
DOI :
10.1109/ULTSYM.1995.495593
