US3593215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Field shaping for magnetoelastic delay lines
Assignee: Westinghouse Electric Corp
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Filing: 1969-04-01
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Granted: 1971-07-13
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Expires: 1989-04-01
Abstract
Abstract Desired magnetic field shaping in a delay line for controlling its dispersive characteristics is achieved by placement of a ferrite material in intimate contact with a high Q magnetic insulating (YIG) material. Low loss is achieved by maintaining the RF coupling circuit in intimate contact with the crystal end and having the dispersive characteristic of the line controlled by ferrite magnetic field shaping material and the RF circuit interpenetrate. Dispersive characteristics of magnetoelastic delay lines are thus controlled through field shaping.
Inventors
- 👤 Robert A Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:52
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/30; H03H9/40
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
87 words
A magnetoelastic delay line having a controlled dispersive characteristic comprising, a high Q magnetic, electrically insulating element, ferrite elements disposed adjacent at least two spaced points on said high Q element, means for applying a static magnetic field along an axis of, and through, said high Q element and said ferrite elements and an RF coupling circuit disposed to couple an RF magnetic field into said high Q element and said ferrite elements, whereby said RF and static magnetic fields interpenetrate for providing said controlled dispersive characteristics.
Claim 2
Dependent Claim
87 words
A magnetoelastic delay line having a controlled dispersive characteristic comprising, a high Q magnetic, electrically insulating element, ferrite elements disposed adjacent at least two spaced points on said high Q element, means for applying a static magnetic field along an axis of, and through, said high Q element and said ferrite elements and an RF coupling circuit disposed to couple an RF magnetic field into said high Q element and said ferrite elements, whereby said RF and static magnetic fields interpenetrate for providing said controlled dispersive characteristics.
Claim 3
Dependent Claim
47 words
A magnetoelastic delay line as set forth in claim 1 wherein said high Q magnetic insulating element is selected from a class of materials including YIG, doped YIG, paramagnetic doped fused quartz, paramagnetic doped single crystalline quartz, iron doped rutile, iron doped barium titanate and strontium titanate.
Claim 4
Dependent Claim
47 words
A magnetoelastic delay line as set forth in claim 1 wherein said ferrite element is a rod, said rod having one end in intimate contact with one end of the high Q magnetic insulating element and its axis parallel to said axis of said high Q element.
Claim 5
Dependent Claim
48 words
A magnetoelastic delay line as set forth in claim 1 wherein said ferrite element is a rod, said rod being in intimate contact with one end of the high Q magnetic insulating element and being disposed with its axis transverse to said axis of the high Q element.
Claim 6
Dependent Claim
45 words
A magnetoelastic delay line comprising, a YIG rod, an RF coupling circuit adjacent opposite ends of the rod, means for applying a magnetic field along the rod and a magnetic field bias circuit disposed to interpenetrate the RF circuit for shaping an applied magnetic field.
Claim 7
Dependent Claim
45 words
A magnetoelastic delay line comprising, a YIG rod, an RF coupling circuit adjacent opposite ends of the rod, means for applying a magnetic field along the rod and a magnetic field bias circuit disposed to interpenetrate the RF circuit for shaping an applied magnetic field.
Claim 8
Dependent Claim
47 words
A magnetoelastic delay line as set forth in claim 5 wherein said magnetic field bias circuit comprises, a ferrite element at each end of the rod, said ferrite elements being in intimate contact with the adjacent end of the YIG rod and the corresponding RF coupling circuit.
Claim 9
Dependent Claim
43 words
A magnetoelastic delay line as set forth in claim 5 wherein each ferrite element is a rod disposed along the axis of the YIG rod with one end of the ferrite rod being in intimate contact with one end of the YIG rod.
Claim 10
Dependent Claim
27 words
A magnetoelastic delay line as set forth in claim 5 wherein each ferrite element is disposed with its axis transverse to the axis of the YIG rod.
Claim 11
Dependent Claim
39 words
A magnetoelastic delay line as set forth in claim 5 wherein said RF coupling circuit adjacent opposite ends of the YIG rod comprises, a coaxial input line having a characteristic impedance substantially matched to that of the YIG rod.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |