Piezoelectric filter with a curved electrode

Details Piezoelectric filter with a curved electrode Piezoelectric filter with a curved electrode

1995-04-28

1996-11-26

Lee, Benny

Wave transmission lines and networks

Coupling networks

Electromechanical filter

310365, 333188, H03H 900

Patent

active

055789749

ABSTRACT:
A piezoelectric resonator (10) with an attenuated spurious response. The resonator (10) includes a piezoelectric crystal plate (12) having opposite surfaces (14, 16), electrodes (18, 24) positioned in overlying relationship on each of the opposite surfaces (14, 16), the electrodes (18, 24) being substantially coextensive and opposite, and providing a primary frequency mode of operation and spurious modes upon suitable energization, and one of the electrodes (18, 24) having a curved extension (23) for reducing spurious modes.

REFERENCES:
patent: 3045744 (1991-09-01), Ando et al.
patent: 3297968 (1967-01-01), Fowler
patent: 3638146 (1972-01-01), Takaku
patent: 4070502 (1978-01-01), Vig et al.
patent: 4127833 (1978-11-01), Bezemer et al.
patent: 4257020 (1981-03-01), Besson
patent: 4471258 (1984-09-01), Kumada
patent: 4481488 (1984-11-01), Dworsky

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