Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1986-07-17
1987-11-17
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310313B, 333154, 333195, H01L 4108
Patent
active
047076313
ABSTRACT:
A surface acoustic wave (SAW) diffraction-effect or interference-effect device with a highly isotropic substrate having a high coupling coefficient and low attenuation losses. The use of X-propagating rotated-Y-cut lithium niobate as the SAW substrate, with the Y rotation angle selected at 121 degrees, provides a practically isotropic material, with a high coupling coefficient and relatively low attenuation losses.
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patent: 4049982 (1977-09-01), Cohen
patent: 4063198 (1977-12-01), Wagers et al.
patent: 4066984 (1978-01-01), Stern
patent: 4126800 (1978-11-01), Shiokawa et al.
patent: 4159435 (1979-06-01), Lewis
patent: 4203082 (1980-05-01), Tsukamoto et al.
patent: 4409571 (1983-10-01), Milsom et al.
Delaney Michael J.
Kagiwada Reynold S.
Lau Kei-Fung
Stokes Robert B.
Yen Kuo-Hsiung
Budd Mark O.
Heal Noel F.
TRW Inc.
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