Ultrasound transducer with low synthetic quality factor

被引：14

作者：

Fiorillo, AS

机构：

[1] Department of Information and Electrical Engineering, University of Salerno, 84084 Fisciano, SA, Via Ponte don Melillo

来源：

APPLIED PHYSICS LETTERS | 1996年 / 68卷 / 02期

关键词：

D O I：

10.1063/1.116447

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

An ultrasound transducer with low synthetic quality factor, for in-air applications, is presented. It is realized by curving a thin sheet of polyvinylidenefluoride and by assembling the so shaped piezo-polymer film onto a mobile support. The resonance frequency, which is inversely proportional to the bending radius, can be easily varied on a range of some tens of kHz, 30-65 kHz, by mechanically controlling the opening are angle of the curved film. An ultrasound transducer with both controlled resonance and controlled axial resolution is obtained. The combination of the different resonance frequencies, related to different opening angles, leads to a synthetic broad-band transducer with unity quality factor Q. (C) 1996 American Institute of Physics.

引用

页码：164 / 166

页数：3

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