interdigital transducer


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interdigital transducer

[‚in·tər′dij·əd·əl tranz′dü·sər]
(electronics)
Two interlocking comb-shaped metallic patterns applied to a piezoelectric substrate such as quartz or lithium niobate, used for converting microwave voltages to surface acoustic waves, or vice versa.
References in periodicals archive ?
The acoustic tweezers are manufactured by fabricating an interdigital transducer onto a piezoelectric chip surface.
Unlike the piezoelectric IDTs, where a pair of the surface electrodes establish one finger of the transducer[8], CMUT interdigital transducers need only one surface electrode, since another one is at the bottom of the device.
Reasons for apodized and unapodized transducer electrodes, linear and nonlinear finger spacing of interdigital transducers and the use of window functions for improved band-pass response are explained clearly.
The author progresses smoothly, first introducing the basic physics of elastic waves and piezo electricity, and then following with the excitation of surface and bulk acoustic waves by means of interdigital transducers.