Acoustic wave resonator filter

Details Acoustic wave resonator filter Acoustic wave resonator filter

1995-04-10

1997-01-07

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310313R, 333195, H03H 964

Patent

active

055920403

ABSTRACT:
A surface acoustic wave resonator filter includes an interdigital electrode on a piezoelectric substrate and has a two-dimensional mode coupling structure coupling a longitudinal resonation in the longitudinal direction consistent with a propagating direction of a surface acoustic wave and a transversal mode resonation in a transverse direction perpendicular to the propagating direction.

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patent: 4350963 (1982-09-01), Iwamoto et al.
patent: 4583047 (1986-04-01), Le Goff et al.
patent: 4590442 (1986-05-01), Saito
patent: 4661738 (1987-04-01), Skeie
M. Takao et al., Widebande Low Loss Double Mode Saw Filters, Ultrasonic Synposium, IEEE, 1992.
M. Tanaka et al., Narrow Bandpass Filter Using Double-Mode Saw Resonators On Quartz, 38th Annual Frequency Control Synposium, IEEE, 1984.
M. Tanaka et al., Narrow Bandpass Double Mode Saw Filter, 15th EM Symposium of Electlic Communication Committee in Japan, 1986.
IEEE988Ultras. Symp. Proc; 2-5 Oct. 1988; pp. 195-202; Yasuo Ebata et al; Current Applications And Future Trends For Saw In Asia.

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