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.
and bandwidth.
| Original language | English |
|---|---|
| Title of host publication | 2009 IEEE International Ultrasonics Symposium |
| Place of Publication | Piscataway |
| Publisher | IEEE |
| Pages | 1695-1698 |
| Number of pages | 4 |
| ISBN (Print) | 9781424443895 |
| DOIs | |
| Publication status | Published - 22 Sep 2009 |
| Event | 2009 IEEE Ultrasonics Symposium - Rome, Italy Duration: 20 Sep 2009 → 23 Sep 2009 |
Conference
| Conference | 2009 IEEE Ultrasonics Symposium |
|---|---|
| Country | Italy |
| City | Rome |
| Period | 20/09/09 → 23/09/09 |
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Keywords
- acoustic transducers
- graded matching layer
- acoustic devices
- acoustic waves
- bandwidth
- filtering theory
- impedance matching
- matched filters
- piezoelectric transducers
Cite this
Ramadas, S. N., O'Leary, R., Mulholland, A., Hayward, G., Mackintosh, A., Troge, A., & Pethrick, R. (2009). Tapered transmission line technique based graded matching layers for thickness mode piezoelectric transducers. In 2009 IEEE International Ultrasonics Symposium (pp. 1695-1698). Piscataway: IEEE. https://doi.org/10.1109/ULTSYM.2009.5441463