US3790907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lattice softening variable delay line
Assignee: United States Department of the Navy
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Filing: 1973-03-30
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Granted: 1974-02-05
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Expires: 1993-03-30
Abstract
Abstract A device for providing a continuously variable delay for successive pulses in a rf pulse train or for individual pulses by using the principle of variable velocity of acoustic waves in materials in which phonons soften. By employing a series of phonon softening devices, each contributes to the desired total delay while introducing a minimum amount of attenuation.
Inventors
- 👤 E Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:35
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/30; H03H9/38
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
117 words
A multichannel variable delay line for delaying an input RF signal by a selected delay comprising: a set of variable delay means each having a different preselected variable delay range for delaying said input RF signal, each of said delay means comprising a ferroelectric rod having a heating coil and low temperature reservoir in thermal contact therewith for varying the temperature of said rod; means for switching said input RF signal to a particular variable delay means in said set of variable delay means wherein said particular variable delay means has a delay range corresponding to said selected delay; and output means connected to said set of variable delay means for reading out said delayed RF signal.
Claim 2
Dependent Claim
117 words
A multichannel variable delay line for delaying an input RF signal by a selected delay comprising: a set of variable delay means each having a different preselected variable delay range for delaying said input RF signal, each of said delay means comprising a ferroelectric rod having a heating coil and low temperature reservoir in thermal contact therewith for varying the temperature of said rod; means for switching said input RF signal to a particular variable delay means in said set of variable delay means wherein said particular variable delay means has a delay range corresponding to said selected delay; and output means connected to said set of variable delay means for reading out said delayed RF signal.
Claim 3
Dependent Claim
13 words
The device of claim 1 wherein said rods have piezoelectric material bonded thereon.
Claim 4
Dependent Claim
118 words
A multichannel variable delay line for delaying an input RF signal by a selected delay comprising: a set of variable delay means each having a different preselected variable delay range for delaying said input RF signal, each of said delay means comprising a tungsten material rod having a heating coil and low temperature reservoir in thermal contact therewith for varying the temperature of said rod; means for switching said input RF signal to a particular variable delay means in said set of variable delay means wherein said particular variable delay means has a delay range corresponding to said selected delay; and output means connected to said set of variable delay means for reading out said delayed RF signal.
Claim 5
Dependent Claim
118 words
A multichannel variable delay line for delaying an input RF signal by a selected delay comprising: a set of variable delay means each having a different preselected variable delay range for delaying said input RF signal, each of said delay means comprising a tungsten material rod having a heating coil and low temperature reservoir in thermal contact therewith for varying the temperature of said rod; means for switching said input RF signal to a particular variable delay means in said set of variable delay means wherein said particular variable delay means has a delay range corresponding to said selected delay; and output means connected to said set of variable delay means for reading out said delayed RF signal.
Claim 6
Dependent Claim
13 words
The device of claim 3 wherein said rods have piezoelectric material bonded thereon.
Claim 7
Dependent Claim
44 words
A delay line for variably delaying an input RF signal by a selected delay interval comprising: a crystalline material having end faces; piezoelectric transducers bonded to said end faces; means for inducing a structural phase transformation in said crystalline material to vary said delay.
Claim 8
Dependent Claim
44 words
A delay line for variably delaying an input RF signal by a selected delay interval comprising: a crystalline material having end faces; piezoelectric transducers bonded to said end faces; means for inducing a structural phase transformation in said crystalline material to vary said delay.
Claim 9
Dependent Claim
69 words
A delay line for variably delaying an input RF signal by a selected delay interval comprising: a crystalline material having end faces; piezoelectric transducers bonded to said end faces to convert said RF signals to acoustic waves in said crystalline material; means for inducing a structural phase transformation in said crystalline material so as to cause changes in the velocity of said acoustic wavE at said structural phase transformations.
Claim 10
Dependent Claim
69 words
A delay line for variably delaying an input RF signal by a selected delay interval comprising: a crystalline material having end faces; piezoelectric transducers bonded to said end faces to convert said RF signals to acoustic waves in said crystalline material; means for inducing a structural phase transformation in said crystalline material so as to cause changes in the velocity of said acoustic wavE at said structural phase transformations.
Claim 11
Dependent Claim
13 words
The delay line of claim 6 wherein said crystalline material comprises a ferroelectric.
Claim 12
Dependent Claim
15 words
The delay line of claim 6 wherein said crystalline material comprises a Beta -Tungsten material.
Claim 13
Dependent Claim
24 words
The device of claim 6 wherein said means for inducing a structural phase transformation comprises means for varying the temperature in said crystalline material.
Claim 14
Dependent Claim
25 words
The device of claim 6 wherein said means for inducing a structural phase transformation comprises means for varying the electric field in said crystalline material.
Claim 15
Dependent Claim
25 words
The device of claim 6 wherein said means for inducing a structural phase transformation comprises means for varying the magnetic field in said crystalline material.
Claim 16
Dependent Claim
25 words
The device of claim 6 wherein said means for inducing a structural phase transformation comprises means for varying the hydrostatic pressure in said crystalline material.
Claim 17
Dependent Claim
24 words
The device of claim 7 wherein said means for inducing a structural phase transformation comprises means for varying the temperature in said crystalline material.
Claim 18
Dependent Claim
24 words
The device of claim 7 wherein said means for inducing a structural transformation comprises means for varying the electric field in said crystalline material.
Claim 19
Dependent Claim
25 words
The device of claim 7 wherein said means for inducing a structural phase transformation comprises means for varying the hydrostatic pressure in said crystalline material.
Claim 20
Dependent Claim
24 words
The device of claim 8 wherein said means for inducing a structural phase transformation comprises means for varying the temperature in said crystalline material.
Claim 21
Dependent Claim
25 words
The device of claim 8 wherein said means for inducing a structural phase transformation comprises means for varying the magnetic field in said crystalline material.
Claim 22
Dependent Claim
25 words
The device of claim 8 wherein said means for inducing a structural phase transformation comprises means for varying the hydrostatic pressure in said crystalline material.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |