Patent ID: 7791253
Filing Date: 2010-09-07
Classification: B06B,H01L

Abstract:
1. A piezoelectric transducer comprising: first and second gas matrix composites comprising a plurality of piezoelectric cylinders separated from each other by a space that is empty or partially empty of matrix material resulting in a gap between cylinders so that the cylinders and matrix material, if any, are substantially entirely unconnected and the piezoelectric cylinders are separated from each other by a distance less than the acoustic wavelength at the frequency of the piezoelectric cylinders; a first gas matrix piezoelectric composite having a side comprising at least one positive pole and another side comprising at least one negative pole; a second gas matrix piezoelectric composite having a side comprising at least one positive pole and another side comprising at least one negative pole; and a substrate having a first side and a second side, wherein the substrate is positioned between the first gas matrix piezoelectric composite and the second gas matrix piezoelectric composite.