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Distributed-period structures for suppression of spurious modes in 1–3 piezocomposites

Distributed-period structures for suppression of spurious modes in 1–3 piezocomposites

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© The Institution of Electrical Engineers
Published

Design of periodic 1–3 piezocomposite transducers requires that the period be made small enough to shift the spurious (band-edge) modes to frequencies well above the desired thickness mode. Modelling of one-dimensional composites indicates that band-edge modes can be modified by using multiple-period dicing in the fabrication process. Experimental data confirming this theoretical prediction, and showing that distributed-period dicing is more effective in suppressing spurious modes, are presented for two-dimensionally piezocomposite transducers.

Inspec keywords: composite materials; piezoelectric transducers

Other keywords: 1-3 connectivity; band-edge modes; multiple-period dicing; modes suppression; spurious modes; piezocomposite transducers; distributed-period structures

Subjects: Transduction; devices for the generation and reproduction of sound; Piezoelectric and ferroelectric devices; Sensing devices and transducers

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