Title :
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
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;
Conference_Titel :
Ultrasonics Symposium, 1995. Proceedings., 1995 IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-2940-6
DOI :
10.1109/ULTSYM.1995.495689
