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.
Inspec keywords: ultrasonic transducers; ultrasonic delay lines
Other keywords:
Subjects: Sonic and ultrasonic transducers and sensors; Acoustic wave devices; Transduction; devices for the generation and reproduction of sound; Acoustic signal processing
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http://iet.metastore.ingenta.com/content/journals/10.1049/el_19770264
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