Design and implementation of mixed-mode transducers

Author

Chou, Ching-Hua ; Khuri-Yakub, Butrus T.

Author_Institution

Edward L. Ginzton Lab., Stanford Univ., CA, USA

Volume

36

Issue

3

fYear

1989

fDate

5/1/1989 12:00:00 AM

Firstpage

337

Lastpage

341

Abstract

In order to design a mixed-mode transducer with high efficiency and broad bandwidth for both longitudinal and shear wave modes, a theory is developed to determine the properties of this transducer with arbitrary acoustic loads at both ends of the piezoelectric element. Several Y-cut lithium niobate (LiNbO/sub 3/) transducers were made on both [110] single-crystal bismuth germanium oxide (Bi/sub 12/GeO/sub 20/) and fused quartz. The piezoelectric plates were attached to indium bonding and later polished to operate in the 100-MHz frequency range. The experimental data of round-trip insertion loss for both longitudinal and shear modes showed an excellent agreement with theoretical predictions.<>

Keywords

lithium compounds; piezoelectric transducers; 100 MHz; Bi/sub 12/GeO/sub 20/; LiNbO/sub 3/; bandwidth; longitudinal; mixed-mode transducers; piezoelectric element; round-trip insertion loss; shear wave; Acoustic transducers; Acoustic waves; Bandwidth; Bismuth; Bonding; Frequency; Germanium; Indium; Lithium niobate; Piezoelectric transducers;

fLanguage

English

Journal_Title

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Publisher

ieee

ISSN

0885-3010

Type

jour

DOI

10.1109/58.19173

Filename

19173