High-frequency membrane hydrophone

被引：37

作者：

Lum, P ^{[1
]}

Greenstein, M ^{[1
]}

Grossman, C ^{[1
]}

Szabo, TL ^{[1
]}

机构：

[1] HEWLETT PACKARD CORP,IMAGING SYST DIV,ANDOVER,MA 01810

来源：

IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL | 1996年 / 43卷 / 04期

关键词：

D O I：

10.1109/58.503713

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

A membrane hydrophone with a 37-mu m diameter spot poled electrode has been fabricated on a 4-mu m-thick film of the piezoelectric copolymer, polyvinylidene fluoride triflnoroethylene (PVDF-TrFE), and initially characterized. The hydrophone has an effective spot size of less than 100 mu m, an on-membrane +7-dB gain buffer amplifier, and a -3-dB bandwidth of 150 MHz. The acoustic properties of the hydrophone were investigated with a transducer equivalent circuit model, the electric fringe fields due to poling were characterized with a finite difference electrostatic field model, and the effective spot diameters 2a(3) and 2a(6) were estimated, Measurements on the bandwidth, effective spot size, and sensitivity are presented, This hydrophone appears suitable for the characterization of both the frequency and spatial parameters of high-frequency transducers such as intravascular ultrasound (IVUS) catheter transducers operating in the 10-40 MHz range.

引用

页码：536 / 544

页数：9

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