Patent US4528529A successfully refreshed from Google Patents.
US4528529A
Expired / Lapsed
US
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Magnetostatic wave resonator
Assignee: HP Inc
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Filing: 1983-12-12
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Granted: 1985-07-09
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Expires: 2003-12-12
Abstract
Abstract A simple resonant cavity for sustaining magnetostatic waves (MSW) in a resonator device is achieved by depositing a ferrimagnetic film on a substrate and cutting two substantially parallel edges in the film. The substantially parallel edges serve as simple reflectors to replace the complex reflector arrays that are etched or otherwise formed in the prior art thin film resonators.
Inventors
- 👤 Ernst Huijer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:27
CPC Classifications
H; H03; H03H; H03H2/00; H03H2/001
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
67 words
A resonator device comprising: a substrate having a planar surface; a film of ferrimagnetic material having at least two substantially parallel reflective edges for supporting resonance, said film being formed on a portion of said planar surface; and transducer means adjacent to at least one of said substantially parallel reflective edges but separate from said film on said planar surface for coupling electromagnetic energy to said resonator.
Claim 2
Dependent Claim
67 words
A resonator device comprising: a substrate having a planar surface; a film of ferrimagnetic material having at least two substantially parallel reflective edges for supporting resonance, said film being formed on a portion of said planar surface; and transducer means adjacent to at least one of said substantially parallel reflective edges but separate from said film on said planar surface for coupling electromagnetic energy to said resonator.
Claim 3
Dependent Claim
15 words
The resonator device as in claim 1 wherein said film comprises yttrium iron garnet (YIG).
Claim 4
Dependent Claim
15 words
The resonator device as in claim 2 wherein said substrate comprises gadolinium gallium garnet (GGG).
Claim 5
Dependent Claim
17 words
The resonator device as in claim 2 wherein said YIG film is expitaxially grown on said substrate.
Claim 6
Dependent Claim
20 words
The resonator device as in claim 1 wherein said transducer means comprises a microstrip parallel to said substantially parallel edges.
Claim 7
Dependent Claim
24 words
The resonator device as in claim 1 wherein said transducer means comprises a microstrip adjacent and parallel to each of said substantially parallel edges.
Claim 8
Dependent Claim
40 words
The resonator device as in claim 1 wherein said transducer means comprises a microstrip spaced parallel to and removed along an x-direction from each of said substantially parallel edges, said x-direction being perpendicular to both of said substantially parallel edges.
Claim 9
Dependent Claim
37 words
The resonator device as in claim 1 wherein said transducer means comprises a microstrip spaced parallel to and removed along a y-direction from each of said substantially parallel edges, said y-direction being normal to said planar surface.
Claim 10
Dependent Claim
51 words
The resonator device as in claim 1 wherein said transducer means comprises a microstrip spaced parallel to and removed along both x- and y-directions from each of said substantially parallel edges, said x-direction being perpendicular to both of said substantially parallel edges and said y-direction being normal to said planar surface.
Claim 11
Dependent Claim
25 words
The resonator device as in claim 1 further comprising a magnetic means magnetically coupled to said ferrimagnetic film for providing a magnetic bias field thereto.
Claim 12
Dependent Claim
22 words
The resonator device as in claim 7 wherein said magnetic means further provides a variable magnetic bias field to said ferrimagnetic film.
References Cited (Backward Citations)
US4028639A
Cited
US4392115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-08 | 1989-01-07 | 1989-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-08 | 1993-01-07 | 1993-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-08 | 1997-01-07 | 1997-07-09 | $7700.00 | Window Closed / Lapsed |