DocumentCode
410237
Title
Effect of surface-bulk hybrid mode on strip admittance in 42°YX and 48°YX cuts of LiTaO3 with Al grating
Author
Naumenko, Natalya ; Abbott, Benjamin ; Malocha, Svetlana
Author_Institution
Moscow Steel & Alloys Inst., Russia
Volume
1
fYear
2003
fDate
5-8 Oct. 2003
Firstpage
632
Abstract
We report on a study of the effect produced by the surface-bulk hybrid (SBH) mode on the performance of resonators built on 42°YX and 48°YX cuts of LiTaO3(LT). An approximation was suggested for SBH mode effect on harmonic admittance, and the main parameters of this mode were extracted from numerically found admittance, as functions of electrode thickness, metalization ratio and detuning factor. In both orientations, effective electromechanical coupling of SBH mode reduces with electrode thickness and increases with metalization ratio. Maximum coupling occurs when the detuning from synchronous resonance is about (0.4-0.6)%. In 48°YX-LT, SBH mode is much stronger attenuated than in 42°YX-LT and its effect on strip admittance is less apparent. The simulated behavior of SBH mode shows good agreement with experimental data.
Keywords
aluminium; bulk acoustic wave devices; electromechanical effects; lithium compounds; surface acoustic wave resonators; Al; Al grating; LiTaO3; bulk acoustic wave devices; detuning factor; electrode thickness; electromechanical coupling; harmonic admittance; metalization ratio; strip admittance; surface acoustic wave devices; surface bulk hybrid mode effect; synchronous resonance; Admittance; Electrodes; Frequency; Gratings; Power harmonic filters; Resonance; SAW filters; Strips; Surface acoustic waves; Surface waves;
fLanguage
English
Publisher
ieee
Conference_Titel
Ultrasonics, 2003 IEEE Symposium on
Print_ISBN
0-7803-7922-5
Type
conf
DOI
10.1109/ULTSYM.2003.1293481
Filename
1293481
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