US3952269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface acoustic wave delay line
Assignee: Raytheon Co
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Filing: 1975-04-28
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Granted: 1976-04-20
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Expires: 1995-04-28
Abstract
Abstract A surface acoustic wave device wherein spaced input and output transducers are disposed on a piezoelectric substrate and wherein a time delay or insertion phase compensation structure is disposed between the transducers in the path of the propagating surface acoustic wave energy, the structure including a group of transversely disposed conductive electrodes initially conductively interconnected outside the propagating energy path whereby a desired time delay or insertion phase may be obtained by electrically insulating a number of the electrodes from the group of initially conductively interconnected electrodes.
Inventors
- 👤 Thomas W. Bristol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:10
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/02535; H03H9/02637; H03H9/02685; H03H9/02771; H03H9/30; H03H9/42; H03H9/423; Y; Y10; Y10T; Y10T29/00; Y10T29/42
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
148 words
A surface acoustic wave delay line for adjusting the time delay or insertion phase of propagating surface acoustic wave energy, comprising: a substrate of piezoelectric material having a surface capable of propagating surface acoustic wave energy; input means including an input transducer disposed on said substrate for launching surface acoustic wave energy along said surface in response to an electrical input signal; output means including an output transducer disposed on said substrate in the path of said propagating energy for detecting said energy incident thereon and producing an electrical output signal; and time delay or phase compensation means disposed on said substrate in the path of said propagating energy between said transducers, said means including a group of spaced conductive electrodes initially conductively interconnected outside said path of said propagating energy, at least one of said electrodes being electrically insulated from the remainder of said group of electrodes.
Claim 2
Dependent Claim
148 words
A surface acoustic wave delay line for adjusting the time delay or insertion phase of propagating surface acoustic wave energy, comprising: a substrate of piezoelectric material having a surface capable of propagating surface acoustic wave energy; input means including an input transducer disposed on said substrate for launching surface acoustic wave energy along said surface in response to an electrical input signal; output means including an output transducer disposed on said substrate in the path of said propagating energy for detecting said energy incident thereon and producing an electrical output signal; and time delay or phase compensation means disposed on said substrate in the path of said propagating energy between said transducers, said means including a group of spaced conductive electrodes initially conductively interconnected outside said path of said propagating energy, at least one of said electrodes being electrically insulated from the remainder of said group of electrodes.
Claim 3
Dependent Claim
13 words
The delay line according to claim 1, wherein said electrodes are periodically spaced.
Claim 4
Dependent Claim
13 words
The delay line according to claim 1, wherein said electrodes are non-periodically spaced.
Claim 5
Dependent Claim
23 words
The delay line according to claim 1, wherein said electrodes are approximately orthogonally oriented with respect to the direction of said propagating energy.
Claim 6
Dependent Claim
26 words
The delay line according to claim 1, wherein said electrodes are initially conductively interconnected by a conductive summing bar disposed at one end of said electrodes.
Claim 7
Dependent Claim
26 words
The delay line according to claim 1, wherein said electrodes are initially conductively interconnected by a conductive summing bar disposed at each end of said electrodes.
Claim 8
Dependent Claim
92 words
In a surface acoustic wave delay line including spaced input and output transducers disposed on a propagating surface of a piezoelectric substrate, the improvement comprising time delay or phase compensation means disposed on the substrate of piezoelectric material in the path of surface acoustic wave energy propagating between the input and output transducers, the means including a group of spaced conductive electrodes initially conductively interconnected outside the path of the propagating energy, at least one of said electrodes being electrically insulated from the remainder of the conductively interconnected group of said electrodes.
Claim 9
Dependent Claim
92 words
In a surface acoustic wave delay line including spaced input and output transducers disposed on a propagating surface of a piezoelectric substrate, the improvement comprising time delay or phase compensation means disposed on the substrate of piezoelectric material in the path of surface acoustic wave energy propagating between the input and output transducers, the means including a group of spaced conductive electrodes initially conductively interconnected outside the path of the propagating energy, at least one of said electrodes being electrically insulated from the remainder of the conductively interconnected group of said electrodes.
Claim 10
Independent Claim
68 words
A method of manufacturing a surface acoustic wave delay line on a piezoelectric substrate comprising the steps of depositing spaced interdigital input and output transducers defining a propagating path therebetween and a group of spaced conductive electrodes conductively interconnected outside said path, and selectively severing at least one of said conductively interconnected conductive electrodes outside said path to provide a desired characteristic related to time delay or phase.
Claim 11
Independent Claim
68 words
A method of manufacturing a surface acoustic wave delay line on a piezoelectric substrate comprising the steps of depositing spaced interdigital input and output transducers defining a propagating path therebetween and a group of spaced conductive electrodes conductively interconnected outside said path, and selectively severing at least one of said conductively interconnected conductive electrodes outside said path to provide a desired characteristic related to time delay or phase.
References Cited (Backward Citations)
US3845420A
Cited
US3882429A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-20 | 1979-10-20 | 1980-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-20 | 1983-10-20 | 1984-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-20 | 1987-10-20 | 1988-04-20 | $7700.00 | Window Closed / Lapsed |