Surface elastic wave device using side lobes

Details Surface elastic wave device using side lobes Surface elastic wave device using side lobes

1977-05-25

1978-11-21

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

333 72, H01L 4110

Patent

active

041268008

ABSTRACT:
A surface elastic wave device including input and output transducer means provided on a base plate of a piezoelectric material, wherein the input transducer means or output transducer means or both comprise a plurality of comb-like electrodes each including an equal number of pairs of interdigital electrodes, and the comb-like electrodes are arranged in parallel with each other with a predetermined spacing therebetween in the longitudinal direction of the interdigital fingers and with a predetermined width. Some of the comb-like electrodes may be differentiated from the remaining ones in respect of the spacing in the longitudinal direction of the interdigital fingers, the width, the number of interdigital finger pairs and/or the overlapping length of the interdigital fingers.

REFERENCES:
patent: 3550045 (1970-12-01), Adler
patent: 3551837 (1970-12-01), Speiser et al.
patent: 3582540 (1971-06-01), Adler
patent: 3600710 (1971-08-01), Adler
patent: 3621482 (1971-11-01), Adler
patent: 3626309 (1971-12-01), Knowles
patent: 3723916 (1973-03-01), Speiser et al.
patent: 3810257 (1974-05-01), Jones et al.

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