US3864647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substantially linear magnetic dispersive delay line and method of operating it
Assignee: Boeing North American Inc
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Filing: 1973-12-26
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Granted: 1975-02-04
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Expires: 1993-12-26
Abstract
Abstract Nondispersive and linearly dispersive magnetic delay lines are disclosed. The delay lines employ layers of magnetic-wave-active material spaced from each other and a layer of magnetic-wavepropagation-modifying material by intervening layers of magneticwave-inactive material. Characteristics of the biasing magnetic field and methods of operating the delay lines are also discussed.
Inventors
- 👤 Wayne L Bongianni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:40
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/30; G; G11; G11C; G11C11/00; G11C11/02; G11C11/16; G11C11/161; G11C11/165; G11C11/1693
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
62 words
IN COMBINATION, A MAGNETIC DELAY LINE COMPRISING: A LAYER OF ELECTRICALLY CONDUCTIVE MATERIAL, AT LEAST ONE LAYER OF MAGNETIC-WAVE-INACTIVE MATERIAL; A PLURALITY OF LAYERS OF MAGNETIC-WAVE-ACTIVE MATERIAL COMPRISED OF YTTRIUM IRON GARNET DISPOSED IN STACKED RELATION, AND; AT LEAST ONE OF SAID LAYERS OF MAGNETIC-WAVE-ACTIVE MATERIAL BEING SPACED APART FROM ANOTHER LAYER OF MAGNETIC-WAVEACTIVE MATERIAL AND FROM THE LAYER OF ELECTRICALLY CONDUC-
Claim 2
Dependent Claim
62 words
IN COMBINATION, A MAGNETIC DELAY LINE COMPRISING: A LAYER OF ELECTRICALLY CONDUCTIVE MATERIAL, AT LEAST ONE LAYER OF MAGNETIC-WAVE-INACTIVE MATERIAL; A PLURALITY OF LAYERS OF MAGNETIC-WAVE-ACTIVE MATERIAL COMPRISED OF YTTRIUM IRON GARNET DISPOSED IN STACKED RELATION, AND; AT LEAST ONE OF SAID LAYERS OF MAGNETIC-WAVE-ACTIVE MATERIAL BEING SPACED APART FROM ANOTHER LAYER OF MAGNETIC-WAVEACTIVE MATERIAL AND FROM THE LAYER OF ELECTRICALLY CONDUC-
Claim 3
Dependent Claim
27 words
The delay line of claim 1 wherein the yttrium iron garnet layers are disposed on opposite sides of a layer of magnetic-wave-inactive material comprising gadolinium gallium garnet.
Claim 4
Dependent Claim
100 words
In combination, a magnetic delay line comprising; a layer of electrically conductive material; at least one layer of magnetic-wave-inactive material; a plurality of layers of magnetic-wave-active material disposed in stacked relation; at least one of said layers of magnetic-wave-active material being spaced apart from another layer of magnetic-wave-active material and from the layer of electrically conductive material by one of said at least one layer of magnetic-wave-inactive material; a plurality of magnets for establishing a magnetic bias field around said delay line, and; said bias field having a gradient perpendicular to the surface of the layers of the magnetic-wave-active material.
Claim 5
Dependent Claim
100 words
In combination, a magnetic delay line comprising; a layer of electrically conductive material; at least one layer of magnetic-wave-inactive material; a plurality of layers of magnetic-wave-active material disposed in stacked relation; at least one of said layers of magnetic-wave-active material being spaced apart from another layer of magnetic-wave-active material and from the layer of electrically conductive material by one of said at least one layer of magnetic-wave-inactive material; a plurality of magnets for establishing a magnetic bias field around said delay line, and; said bias field having a gradient perpendicular to the surface of the layers of the magnetic-wave-active material.
Claim 6
Independent Claim
112 words
A method of operating a magnetic delay line comprising the steps of: providing a plurality of layers of magnetic-wave-active material disposed in stacked relation and spaced apart from each other by intervening layers of magnetic-wave-inactive material; providing magnet means which produce a magnetic bias field that has a substantial intensity gradient; positioning said stack in the vicinity of said magnet means where said magnetic field intensity gradient is substantially perpendicular to the surface of said layers; placing first and second electrical conductors in driving and receiving relation to the delay line, respectively; and applying the signal to be delayed to the first conductor and taking the delayed signal from the second conductor.
Claim 7
Independent Claim
112 words
A method of operating a magnetic delay line comprising the steps of: providing a plurality of layers of magnetic-wave-active material disposed in stacked relation and spaced apart from each other by intervening layers of magnetic-wave-inactive material; providing magnet means which produce a magnetic bias field that has a substantial intensity gradient; positioning said stack in the vicinity of said magnet means where said magnetic field intensity gradient is substantially perpendicular to the surface of said layers; placing first and second electrical conductors in driving and receiving relation to the delay line, respectively; and applying the signal to be delayed to the first conductor and taking the delayed signal from the second conductor.
Claim 8
Independent Claim
103 words
A method of making a magnetic delay line structure comprising the steps of: providing at least one layer of magnetic-wave-inactive material; depositing a plurality of layers of magnetic-wave-active material simultaneously on opposite sides of said at least one layer of magnetic-wave-inactive material by liquid phase epitaxy; providing a layer of magnetic-wave-propagation-modifying material, and; arranging said at least one layer of magnetic-wave-inactive material, said plurality of layers of magnetic-wave-active material and said layer of magnetic-wave-propagation-modifying material in stacked relation with the plurality of layers of magnetic-wave-active material spaced apart from each other by intervening ones of said at least one layer of magnetic-wave-inactive material.
Claim 9
Independent Claim
103 words
A method of making a magnetic delay line structure comprising the steps of: providing at least one layer of magnetic-wave-inactive material; depositing a plurality of layers of magnetic-wave-active material simultaneously on opposite sides of said at least one layer of magnetic-wave-inactive material by liquid phase epitaxy; providing a layer of magnetic-wave-propagation-modifying material, and; arranging said at least one layer of magnetic-wave-inactive material, said plurality of layers of magnetic-wave-active material and said layer of magnetic-wave-propagation-modifying material in stacked relation with the plurality of layers of magnetic-wave-active material spaced apart from each other by intervening ones of said at least one layer of magnetic-wave-inactive material.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |