HIGH DIRECTIVE ULTRASONIC TRANSDUCER
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United States of America Patent
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Issued Date -
Jan 31, 2013
app pub date -
Jul 25, 2012
filing date -
Jul 29, 2011
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
Disclosed is a high directive ultrasonic transducer that can concentrate a radiated ultrasonic wave in one direction by making an orientation angle of the radiated ultrasonic wave small in an ultrasonic transducer having a planar radiation plate structure, which has high radiation efficiency in an air medium. The high directive ultrasonic transducer according to the present disclosure includes a planar radiation plate configured to radiate an ultrasonic wave into a medium; a driving unit configured to vibrate the radiation plate in a higher order mode of a secondary order or more by applying predetermined force to a bottom surface of the radiation plate; and a matching layer formed in a height corresponding to 1/4 of an ultrasonic wavelength in the medium, in a part having a positive vibration velocity on a top surface of the radiation plate.
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