Title :
Unidirectional transducer for lamb-wave delay lines
Author :
Toda, Kohji ; Shinoda, Yoshiaki
Author_Institution :
National Defense Academy, Department of Electrical Engineering, Yokosuka, Japan
Abstract :
A new type of unidirectional transducer is proposed and demonstrated. This transducer consists of three electrode groups, one on the bottom surface. The others are interdigital electrode groups 60° out of phase and on the top surface. Better than 20 dB of directionally was obtained for the zeroth symmetrical mode of a Lamb wave.
Keywords :
ultrasonic delay lines; ultrasonic transducers; Lamb wave delay lines; interdigital electrode groups; unidirectional transducer;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19770264
