Wave transmission lines and networks – Coupling networks – Delay lines including elastic surface wave propagation means
Patent
1980-10-02
1982-05-18
Nussbaum, Marvin L.
Wave transmission lines and networks
Coupling networks
Delay lines including elastic surface wave propagation means
333195, 364821, H03H 942, H03H 968, H03H 970, H01L 4122
Patent
active
043307680
ABSTRACT:
A surface acoustical wave (SAW) waveguide device which compensates for dispersion by utilizing diffused substrates. Various embodiments have in-diffused or out-diffused core regions in which the ray is channeled that are topped by a thin metallic film overlay. Partially surrounding each core region are cladding portions which are also selectively in-diffused or out-diffused and may be covered by the metal overlay. By varying the amounts of in-diffusion or out-diffusion for the particular application, the effects of dispersion are minimized.
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patent: 3990775 (1976-11-01), Kaminow et al.
patent: 4181904 (1980-01-01), Weller et al.
patent: 4217564 (1980-08-01), Autra
Parker et al., "Acoustic Surface-Wave Band-Pass Filters.
Weller et al., Surface Acoustic Waveguides on LiNbO.sub.3 formed by Titan In-Diffusion", Applied Physic Letters, vol. 31, No. 3, Aug. 1, 1977, pp. 146-148.
Giallorenzi Thomas G.
Huang Peter H. C.
Weller Joseph F.
Beers Robert F.
Ellis William T.
Nussbaum Marvin L.
The United States of America as represented by the Secretary of
Walden Kenneth E.
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