Bulk wave excitation from finite length SAW transducers including massloading

Author

Gamble, K.J. ; Malocha, Donald C.

Author_Institution

Dept. of Electr. & Comput. Eng., Central Florida Univ., Orlando, FL, USA

Volume

1

fYear

1999

fDate

17-20 Oct. 1999

Firstpage

77

Abstract

A analysis of bulk wave generation from finite length transducers on YZ-LiNbO₃ is presented. The effect of the metallic electrodes is taken into account using the Finite Element Method. The substrate is modeled using both analytical and numerical means. The simulation results suggest that thick electrodes (gold or aluminum) increase the electrical coupling of a uniform SAW transducer to the shear vertical bulk wave at approximately twice the SAW center frequency. Experimental data in the literature appears to support this assertion.

Keywords

finite element analysis; lithium compounds; surface acoustic wave transducers; Al; Au; LiNbO₃; LiNbO₃ substrate; analytical model; bulk wave excitation; electrical coupling; finite element method; finite length SAW transducer; mass loading; metallic electrode; numerical simulation; shear vertical wave; Aluminum; Chebyshev approximation; Degradation; Electrodes; Frequency; Gold; Passband; Resonator filters; Surface acoustic waves; Transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1999. Proceedings. 1999 IEEE

Conference_Location

Caesars Tahoe, NV

ISSN

1051-0117

Print_ISBN

0-7803-5722-1

Type

conf

DOI

10.1109/ULTSYM.1999.849360

Filename

849360