Broadband phased array transducer design with frequency...

H - Electricity – 04 – R

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Details

H04R 17/00 (2006.01) A61B 8/00 (2006.01) B06B 1/06 (2006.01) G01S 7/52 (2006.01) G01S 15/89 (2006.01) G10K 11/32 (2006.01) H04R 17/08 (2006.01)

Patent

CA 2129946

There is provided a transducer array with a plurality of piezoelectric elements having a minimum and maximum thickness. In one embodiment, the maximum thickness is less than or equal to 140 percent of the minimum thickness. In an alternate embodiment, the maximum thickness is greater than 140 percent of the minimum thickness and the transducer array is capable of simulating the excitation of a wider aperture two-dimensional transducer array. One or more matching layers may be used to further increase bandwidth performance. In addition, a two crystal transducer element as well as a composite transducer structure may be formed using the principles of this invention.

L'invention porte sur un réseau de transducteurs comprenant une série d'éléments piézoélectriques présentant une épaisseur minimale et maximale. Dans une configuration, l'épaisseur maximale est inférieure ou égale à 140 pour cent de l'épaisseur minimale. Dans une autre version, l'épaisseur maximale est supérieure à 140 pour cent de l'épaisseur minimale, et le réseau de transducteurs est capable de simuler l'excitation d'un réseau de transducteurs bidimensionnel à plus grande ouverture. Une ou plusieurs couches concordantes peuvent également être utilisées pour augmenter encore plus le rendement de la largeur de bande. De plus, un élément transducteur à deux cristaux et une structure magnétique composite peuvent être formés en se servant des principes de l'invention.

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