Interdigital transducer with distibuted excitation

Details Interdigital transducer with distibuted excitation Interdigital transducer with distibuted excitation

2005-02-08

2005-02-08

Budd, Mark (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S31300R, C310S31300R

Reexamination Certificate

active

06853113

ABSTRACT:
An interdigital transducer for a surface acoustic wave includes an acoustic track with a width of BSgesand subtransducers arranged adjacent to each other on the acoustic track and connected in series. The subtransducers include, in a transverse direction, n series subtransducers each having a track width of BSxi(i=1, 2, . . . n(x); n (x)≧2). In the subtranducersBSges=∑i=1n⁢ ⁢BSxi,BSxidoes not equal BS(x+1)i.

REFERENCES:
patent: 4006438 (1977-02-01), Bennett
patent: 4223284 (1980-09-01), Inoue et al.
patent: 4321567 (1982-03-01), Sandy
patent: 5818146 (1998-10-01), Kurahashi et al.
patent: 5821834 (1998-10-01), Xu et al.
patent: 5932950 (1999-08-01), Yamada et al.
patent: 6531937 (2003-03-01), Kadota et al.

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