Tapered transmission line technique based graded matching layers for thickness mode piezoelectric transducers

Sivaram Nishal Ramadas; Richard O'Leary; Anthony Mulholland; Gordon Hayward; Allan Mackintosh; Alexandre Troge; Richard Pethrick

doi:10.1109/ULTSYM.2009.5441463

Tapered transmission line technique based graded matching layers for thickness mode piezoelectric transducers

Sivaram Nishal Ramadas, Richard O'Leary, Anthony Mulholland, Gordon Hayward, Allan Mackintosh, Alexandre Troge, Richard Pethrick

Department of Engineering Mathematics

Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

1 Citation (Scopus)

Abstract

Conventionally, in order to acoustically match thickness mode piezoelectric transducers to a low acoustic impedance load medium, multiple quarter wavelength (QW) matching layers are employed at the front face of the device. Typically a number of layers, 2-4 in number, are employed resulting in discrete impedance steps within the acoustic matching scheme. This can result in impedance matching with limited bandwidth characteristics. This paper investigates the application of tapered transmission line filter theory to implement a graded impedance profile, through the thickness of the matching layer scheme, to solve the impedance mismatch problem whilst accounting for enhanced transducer sensitivity
and bandwidth.

Original language	English
Title of host publication	2009 IEEE International Ultrasonics Symposium
DOIs	https://doi.org/10.1109/ULTSYM.2009.5441463
Publication status	Published - 22 Sept 2009

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title = "Tapered transmission line technique based graded matching layers for thickness mode piezoelectric transducers",

abstract = "Conventionally, in order to acoustically match thickness mode piezoelectric transducers to a low acoustic impedance load medium, multiple quarter wavelength (QW) matching layers are employed at the front face of the device. Typically a number of layers, 2-4 in number, are employed resulting in discrete impedance steps within the acoustic matching scheme. This can result in impedance matching with limited bandwidth characteristics. This paper investigates the application of tapered transmission line filter theory to implement a graded impedance profile, through the thickness of the matching layer scheme, to solve the impedance mismatch problem whilst accounting for enhanced transducer sensitivity and bandwidth.",

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AU - Ramadas, Sivaram Nishal

AU - O'Leary, Richard

AU - Mulholland, Anthony

AU - Hayward, Gordon

AU - Mackintosh, Allan

AU - Troge, Alexandre

AU - Pethrick, Richard

PY - 2009/9/22

Y1 - 2009/9/22

N2 - Conventionally, in order to acoustically match thickness mode piezoelectric transducers to a low acoustic impedance load medium, multiple quarter wavelength (QW) matching layers are employed at the front face of the device. Typically a number of layers, 2-4 in number, are employed resulting in discrete impedance steps within the acoustic matching scheme. This can result in impedance matching with limited bandwidth characteristics. This paper investigates the application of tapered transmission line filter theory to implement a graded impedance profile, through the thickness of the matching layer scheme, to solve the impedance mismatch problem whilst accounting for enhanced transducer sensitivity and bandwidth.

AB - Conventionally, in order to acoustically match thickness mode piezoelectric transducers to a low acoustic impedance load medium, multiple quarter wavelength (QW) matching layers are employed at the front face of the device. Typically a number of layers, 2-4 in number, are employed resulting in discrete impedance steps within the acoustic matching scheme. This can result in impedance matching with limited bandwidth characteristics. This paper investigates the application of tapered transmission line filter theory to implement a graded impedance profile, through the thickness of the matching layer scheme, to solve the impedance mismatch problem whilst accounting for enhanced transducer sensitivity and bandwidth.

UR - https://pureportal-staging.strath.ac.uk/en/publications/7792d863-173b-4a88-ac2b-d41656366f3c

U2 - 10.1109/ULTSYM.2009.5441463

DO - 10.1109/ULTSYM.2009.5441463

M3 - Conference Contribution (Conference Proceeding)

SN - 9781424443895

BT - 2009 IEEE International Ultrasonics Symposium

ER -

Tapered transmission line technique based graded matching layers for thickness mode piezoelectric transducers

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