Accession Number : ADD014155

Title :   Saw Grating-Waveguide for Reduced Filter Diffraction.

Descriptive Note : Patent Application, Filed 19 Jun 89,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Mariani, Elio A

Report Date : 19 Jun 1989

Pagination or Media Count : 13

Abstract : A surface acoustic wave (SAW) device (e.g., filter) comprises a piezoelectric substrate such as lithium niobate, an input and an output interdigital transducer deposited on the substrate, in alignment, and a SAW shorted-grating waveguide disposed between the transducers. The shorted-grating waveguide has the same periodicity (lambda/2) as that of the input/output transducers. The waveguide is electrically isolated from the transducers. (RH)

Descriptors :   *DIFFRACTION, *FILTERS, *LITHIUM NIOBATES, *PIEZOELECTRIC MATERIALS, *SUBSTRATES, *SURFACE ACOUSTIC WAVES, *TRANSDUCERS, INPUT OUTPUT PROCESSING, REDUCTION

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

Distribution Statement : APPROVED FOR PUBLIC RELEASE