US4016515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bulk acoustic wave delay line
Assignee: Raytheon Co
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Filing: 1975-12-31
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Granted: 1977-04-05
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Expires: 1995-12-31
Abstract
Abstract A bulk wave acoustic wave device with electrodes fabricated on a crystal in the form of arrays each having a plurality of closely spaced electrodes, one array being angularly disposed with respect to the other to provide at least one pair of matching electrodes notwithstanding uncontrolled beam wander within the crystal.
Inventors
- 👤 II Michael T. Wauk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:27
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/30; H03H9/36
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
154 words
A bulk acoustic wave delay line, comprising: a body of material capable of supporting propagating acoustic wave energy in said body; transducer means including input and output transducers disposed on said body in spaced relationship to each other for respectively converting electromagnetic wave energy to acoustic wave energy and the converse thereof, and for directing and receiving said propagating acoustic wave energy, said transducers each including a plurality of relatively closely spaced, symmetrically disposed and evenly dispersed conductive electrodes defining respectively first and second top-electrode array patterns, each of said array patterns defining an axis of symmetry, said second pattern being oriented to have its axis of symmetry at a predetermined offset angle with respect to said axis of symmetry of said first pattern causing propagating acoustic wave energy from at least one of said electrodes in said first pattern to be intercepted by at least one of said electrodes in said second pattern.
Claim 2
Dependent Claim
154 words
A bulk acoustic wave delay line, comprising: a body of material capable of supporting propagating acoustic wave energy in said body; transducer means including input and output transducers disposed on said body in spaced relationship to each other for respectively converting electromagnetic wave energy to acoustic wave energy and the converse thereof, and for directing and receiving said propagating acoustic wave energy, said transducers each including a plurality of relatively closely spaced, symmetrically disposed and evenly dispersed conductive electrodes defining respectively first and second top-electrode array patterns, each of said array patterns defining an axis of symmetry, said second pattern being oriented to have its axis of symmetry at a predetermined offset angle with respect to said axis of symmetry of said first pattern causing propagating acoustic wave energy from at least one of said electrodes in said first pattern to be intercepted by at least one of said electrodes in said second pattern.
Claim 3
Dependent Claim
25 words
The bulk acoustic wave delay line according to claim 1, wherein said input and output transducers are disposed at opposite parallel ends of said body.
Claim 4
Dependent Claim
15 words
The bulk acoustic wave delay line according to claim 1, wherein said electrodes are circular.
Claim 5
Dependent Claim
15 words
The bulk acoustic wave delay line according to claim 3, wherein said pattern is polygonal.
Claim 6
Dependent Claim
15 words
The bulk acoustic wave delay line according to claim 4, wherein said pattern is hexagonal.
Claim 7
Dependent Claim
21 words
The bulk acoustic wave delay line according to claim 1, wherein said electrodes are rectangular and wherein said pattern is rectangular.
Claim 8
Dependent Claim
21 words
The bulk acoustic wave delay line according to claim 1, wherein said offset angle, θ, is determined by the relationship ##EQU2##
Claim 9
Dependent Claim
27 words
The bulk acoustic wave delay line according to claim 1, wherein said array patterns are hexagonal, said electrodes are circular and said offset angle is approximately 12°.
Claim 10
Dependent Claim
25 words
The bulk acoustic wave delay line according to claim 1, wherein said electrodes are circular and have a diameter between approximately 4 to 8 mil.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-04 | 1980-10-04 | 1981-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-04 | 1984-10-04 | 1985-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-04 | 1988-10-04 | 1989-04-05 | $7700.00 | Window Closed / Lapsed |