Title :
Q values of longitudinal leaky SAWs propagating on rotated Y-cut LN substrates along the perpendicular to the X axis
Author :
Isobe, Atsushi ; Hikita, Mitsutaka ; Asai, Kengo
Author_Institution :
Dept. of Phys., Tohoku Univ., Sendai, Japan
Abstract :
Longitudinal leaky SAWs (LLSAWs), which can be excited in a thick aluminum (Al) grating on a rotated Y-cut lithium-niobate substrate, were analyzed in a simulation that combined both FEM and BEM. The Q-value dependence of an LLSAW on the rotated angle and the Al-grating thickness was clear. The simulation results were confirmed experimentally. These SAWs have potential applications in high-frequency SAW devices because their velocities range from 6100 to 6500 m/s and their optimum Q values are theoretically larger than 4000.
Keywords :
aluminium; boundary-elements methods; finite element analysis; lithium compounds; surface acoustic waves; 6100 to 6500 m/s; Al-LiNbO/sub 3/; BEM; FEM; LiNbO/sub 3/; Q values; aluminum grating; longitudinal leaky surface acoustic waves; rotated Y-cut lithium-niobate substrate; Aluminum; Analytical models; Electrodes; Gratings; Radio frequency; SAW filters; Sawing machines; Substrates; Surface acoustic wave devices; Surface acoustic waves;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
DOI :
10.1109/TUFFC.2005.1561636
