Transducer structure that operates with acoustic waves

Details Transducer structure that operates with acoustic waves Transducer structure that operates with acoustic waves

2006-05-09

2006-05-09

Schuberg, Darren (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C333S195000, C310S31300R

Reexamination Certificate

active

07042132

ABSTRACT:
For improved conformance of a filter operating with acoustic waves, a transducer structure is provided in which the separations between respectively two adjacent electrode fingers of an inter-digital transducer (IDTv) vary over the length of the transducer. The variation thereby preferably follows a continuous distribution function. Reactance filters that are provided with such filters in the serial branch show an improved electrical conformance in the transmission range.

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Ruppel, “SAW Devices for Spread Spectrum Applications”,Spread Spectrum Techniques and Applications Proceedings, 1996, IEEE 4th International Symposium on Mainz, Germany, Sep. 22-25, 1996, pp. 713-719.
Wilcox et al, “Acoustic Fields from PVDF Interdigital Transducers”,IEEE Proc.-Sci. Meas. Technol., vol. 145, No. 5, Sep. 1998, pp. 250-259.

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