Electrical reflection coefficient and velocity shift for groove gratings

Author

Robinson, H. ; Hahn, Y.

Author_Institution

Dept. of Phys., Connecticut Univ., Storrs, CT, USA

fYear

1989

fDate

3-6 Oct 1989

Firstpage

355

Abstract

All previous calculations for the electrical reflection coefficient and velocity shift for grooves have used formulas valid for the reflection of a SAW (surface acoustic wave) from an array of conducting strips. However, the discontinuity in electrical boundary conditions leading to these formulas does not exist in groove gratings. A new expression for the electrical reflection coefficient and velocity shift for the same material overlays is derived from the variational principle and from perturbation theory. The results for various substrates are compared to show the agreement between the two approaches. The implications of this new formulation for the design of grooved arrays on various materials is discussed

Keywords

acoustic wave reflection; acoustic wave velocity; surface acoustic waves; SAW; conducting strips; electrical boundary conditions; electrical reflection coefficient; groove gratings; perturbation theory; substrates; variational principle; velocity shift; Capacitive sensors; Equations; Gratings; Ice; Physics; Reflection; Strips; Surface acoustic waves; Tensile stress; Transistors;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1989. Proceedings., IEEE 1989

Conference_Location

Montreal, Que.

Type

conf

DOI

10.1109/ULTSYM.1989.67008

Filename

67008