Reflection properties of fast leaky surface acoustic waves on lithium tetraborate

Author

Gulyaev, Yu.V. ; Grigorievski, V.I.

Author_Institution

Inst. of Radio Eng. & Electron., Acad. of Sci., Moscow, Russia

Volume

1

fYear

1999

fDate

17-20 Oct. 1999

Firstpage

185

Abstract

The dispersion curves of FLSAW propagating along periodic structure of metal electrodes on a lithium tetraborate substrate have been calculated. The calculation method is based on generalized periodic Green´s function approach. The mass and stress loading of electrodes are considered by newly rigorously developed perturbation technique. To investigate the influence of higher order effects the finite element method is applied. It is found that the reflection coefficient in open circuited structure for FLSAW to FLSAW reflection reveals a minimum value as the electrode thickness increases. Contrary to that the reflection coefficient for SAW to SAW reflection increases continuously with the increase of electrode thickness.

Keywords

Green´s function methods; boundary-value problems; eigenvalues and eigenfunctions; finite element analysis; lithium compounds; periodic structures; surface acoustic waves; ultrasonic reflection; Li₂B₄O₇; boundary conditions; dispersion curves; eigenvalue problem; electrode thickness dependence; fast leaky surface acoustic waves; finite element method; generalized periodic Green´s function; higher order effects; mass loading; metal electrodes; metal gratings; open circuited structure; periodic structure; perturbation technique; reflection properties; stress loading; Acoustic propagation; Acoustic reflection; Acoustic waves; Electrodes; Green´s function methods; Lithium; Periodic structures; Perturbation methods; Stress; Surface acoustic waves;

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.1999.849382

Filename

849382