Design of piezoelectric micro-machined ultrasonic transducer for wideband ultasonic radiation in air

Hongmin Ahn, Jaehyeok Jin, W. Moon
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引用次数: 0

Abstract

In this paper, the design of piezoelectric Micro-machined Ultrasonic Transducer (pMUT) for wideband ultrasonic radiation in air was investigated. One of the methods to achieve wide frequency bandwidth in single device is modeling the transducer to multi-resonance system. The new pMUT was designed as a multi-resonance system with the addition of a suitable acoustic structure to the front and back of a thin film structure. A new pMUT consisting of thin film parts, radiation parts, and packaging parts is designed with a Lumped Parameter Model (L.P.M). Finally, it was validated as a Finite Element Method (FEM) simulation. The final designed pMUT achieved a frequency band of 102 kHz ~ 132 kHz (-3 dB).
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用于空气中宽带超声辐射的压电微机械超声换能器设计
本文研究了用于空气中宽带超声辐射的压电微机械超声换能器的设计。实现单器件宽频带的方法之一是将换能器建模为多谐振系统。新的pMUT被设计成一个多共振系统,在薄膜结构的前后增加了合适的声学结构。采用集总参数模型(l.p.m.)设计了一种由薄膜部件、辐射部件和封装部件组成的新型pMUT。最后,通过有限元仿真对其进行了验证。最终设计的pMUT实现了102 kHz ~ 132 kHz (-3 dB)的频段。
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CiteScore
0.60
自引率
50.00%
发文量
1
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