Multiple resonator or filter vibrating in a coupled mode

Details Multiple resonator or filter vibrating in a coupled mode Multiple resonator or filter vibrating in a coupled mode

1976-12-10

1978-02-28

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

H01L 4104

Patent

active

040769879

ABSTRACT:
A multiple resonator or filter is described in the form of a rectangular of piezoelectric material having dimensional ratios selected so as to assure vibration in a thickness shear mode strongly coupled with a flexural mode. At least two energy trapping zones are provided extending over the entire width of the bar. The arrangement enables achievement of a high quality factor combined with extremely small dimensions.

REFERENCES:
patent: 2306909 (1942-12-01), Sykes
patent: 3222622 (1965-12-01), Curran et al.
patent: 3525944 (1970-08-01), Smith
patent: 3564463 (1971-02-01), Beaver et al.
patent: 3614483 (1971-10-01), Berlincourt
patent: 3704433 (1972-11-01), Garrison

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