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US 4,055,819 AGranted
Acoustic ridge delay line
AssigneeTexas Instruments Incorporated
InventorsRobert S. Wagers, Clinton S. Hartmann
Life of this patent
Estimating the term…
Abstract
An improved acoustic waveguide structure which comprises a ridge waveguide disposed in a horizontal direction extending outwardly from a substrate. The horizontal orientation of the waveguide which is in the form of a ledge results in particle motion of the ledge predominantly normal to the substrate plane with the largest motion at the free edge of the ledge and almost no motion in the substrate, thereby permitting a plurality of such structures to be densely packed on a common substrate.
Claims9
An acoustic delay line comprising:
- a substrate;
- a horizontal ledge extending outwardly from said substrate with the top of the ledge being coplanar with the top surface of said substrate, said ledge being at least partially made of piezoelectric material, said substrate and said ledge defining an acoustic waveguide;
- and
- an input transducer deposited on one end of said ledge and an output transducer deposited on the other end of said ledge.
1 more element
An acoustic delay line comprising:
- a substrate;
- a horizontal ledge extending outwardly from said substrate with the top of the ledge being coplanar with the top surface of said substrate, said ledge being at least partially made of piezoelectric material, said substrate and said ledge defining an acoustic waveguide;
- and
- an input transducer comprising a transducer pad having a plurality of electrode fingers extending laterally to the edge of said ledge, and an output transducer comprising a transducer pad having a plurality of electrode fingers extending laterally toward the edge of said ledge with said input transducer deposited on one end of said ledge and said output transducer deposited on the other end of said ledge.
1 more element
An acoustic delay line comprising:
- a substrate;
- a horizontal ledge extending outwardly from said substrate with the top of the ledge being coplanar with the top surface of said substrate, said ledge being at least partially made of piezoelectric material, said substrate and said ledge defining an acoustic waveguide;
- an input transducer deposited on one end of said ledge and an output transducer deposited on the other end of said ledge;
- and
- a plurality of acoustic waveguides are provided with the respective horizontal ledges thereof being disposed in parallel relationship to define a plurality of parallel ridge waveguides and further including
- means to couple said waveguides in series to form an elongated delay line.
3 more elements
Dependencies are inferred from the claim text.