Switchable single mode Lamb wave transduction by means of both side excitation

Author

Mao, Y. ; Shui, Y. ; Jiang, W. ; Yin, J.

Author_Institution

Modern Acoust. Lab., Nanjing Univ., China

Volume

1

fYear

1995

fDate

7-10 Nov 1995

Firstpage

807

Abstract

Two identical interdigital transducers, deposited on both sides of the 127.86° Y-X LiNbO₃ plate symmetrically, were used to generate Lamb waves. For the case of electrically symmetrical connection of transducers, the S₀ mode was generated four or five times more strongly than that for the same transducer on one side, while the A ₀ mode was reduced by about 10 dB. For antisymmetrical electric connection, the A₀ mode is strong and the S₀ mode is suppressed. Experiments on nonpiezoelectric medium glass with 121° Y-X LiNbO₃ on both sides showed a similar result. A delay line composed of such a structure has an insertion loss of only 3 dB

Keywords

interdigital transducers; lithium compounds; surface acoustic wave delay lines; surface acoustic wave transducers; ultrasonic transducers; 3 dB; 8.8 MHz; 9.89 MHz; A₀ mode; Lamb wave generation; LiNbO₃; S₀ mode; Y-X LiNbO₃ plate; antisymmetrical electric connection; both side excitation; delay line; electrically symmetrical connection; insertion loss; interdigital transducers; nonpiezoelectric medium glass; switchable single mode Lamb wave transduction; Acoustic transducers; Acoustic waves; Bonding; Delay lines; Frequency; Glass; Insertion loss; Piezoelectric transducers; Switches; Ultrasonic transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1995. Proceedings., 1995 IEEE

Conference_Location

Seattle, WA

ISSN

1051-0117

Print_ISBN

0-7803-2940-6

Type

conf

DOI

10.1109/ULTSYM.1995.495689

Filename

495689