Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1990-03-29
1990-10-23
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
333153, 333195, H01L 4108
Patent
active
049654799
ABSTRACT:
A surface transverse wave resonator comprises a piezoelectric substrate having at least one surface, wherein said substrate includes a crystalline structure that permits the propagation of transverse waves. The resonator also comprises a transducing set of periodic perturbations which are positioned atop the substrate surface, wherein the transducing set converts electromagnetic energy from an external source into the transverse waves. The resonator further comprises a receiving set of periodic perturbations which are positioned atop the substrate surface remote of the transducing set of periodic perturbations, wherein the receiving set converts the transverse waves into resultant electromagnetic energy. Moreover, the resonator includes a central set of surface-trapping periodic perturbations for maintaining the transverse waves adjacent to the substrate surface, wherein the central set is positioned intermediate the transducing set and the receiving set. Further, the resonator includes at least two sets of reflecting periodic perturbations for reflecting the transverse waves, wherein each of the sets of reflecting periodic perturbations is positioned adjacent to a respective one of the transducing set and the receiving set remote of the central set.
REFERENCES:
patent: 3886504 (1975-05-01), Hartmann et al.
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patent: 4144507 (1979-03-01), Shreve
patent: 4204178 (1980-05-01), Mitchell
patent: 4349794 (1982-09-01), Kagiwada et al.
patent: 4609891 (1986-09-01), Solie et al.
patent: 4616197 (1986-10-01), Wright
Bagwell Timothy L.
Bray Robert C.
Cross Peter S.
Elliott Scott S.
Budd Mark O.
Hewlett--Packard Company
Milks, III William C.
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