Accession Number : ADD009660

Title :   Dispersion Compensated Acoustic Surface Waveguides Using Diffused Substrates.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Huang,Peter H C ; Weller,Joseph F ; Giallorenzi,Thomas G

Report Date : 18 May 1982

Pagination or Media Count : 7

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. (Author)

Descriptors :   *Patents, *Surface acoustic wave devices, *Waveguides, *Acoustic waves, *Surface waves, Diffusion, Dispersion relations, Delay lines, thin films, Lithium niobates, Compensation, Specifications, Diffusion coatings, Cost effectiveness, Convolution, Overlays, Acoustic velocity, Cladding, Lithium compounds, Metal films, Regions, Signal processing, Substrates, Titanium, Dispersions, Piezoelectric crystals

Subject Categories : Line, Surface and Bulk Acoustic Wave Devices
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE