Patent US4782312A successfully refreshed from Google Patents.
US4782312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mode selective magnetostatic wave resonators
Assignee: HP Inc
•
Filing: 1987-10-22
•
Granted: 1988-11-01
•
Expires: 2007-10-22
Abstract
Abstract A resonator in which the input and output transducers are positioned to couple strongly into a resonant mode of interest. Signal drains are included to drain energy out of spurious resonant modes. In a magnetostatic wave resonator, the signal drains are preferably grooves in the surface of the ferrimagnetic film forming the resonator cavity.
Inventors
- 👤 Kok-Wai Chang
- 👤 Giuseppe Miccoli
- 👤 Waguih S. Ishak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:08
CPC Classifications
H; H03; H03H; H03H2/00; H03H2/001
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
51 words
A magnetostatic wave resonator comprising: a rectangular film of ferrimagnetic material having a set of walls that enclose a resonant cavity; an input transducer for launching waves in said resonant cavity, said input transducer being located over a peak of a resonant mode of interest to strongly couple into that mode.
Claim 2
Dependent Claim
51 words
A magnetostatic wave resonator comprising: a rectangular film of ferrimagnetic material having a set of walls that enclose a resonant cavity; an input transducer for launching waves in said resonant cavity, said input transducer being located over a peak of a resonant mode of interest to strongly couple into that mode.
Claim 3
Dependent Claim
28 words
A resonator as in claim 1 further comprising an output transducer located over a peak of said resonant mode of interest to strongly couple out of said mode.
Claim 4
Dependent Claim
24 words
A resonator as in claim 2 wherein said input and output transducers are located over the same peak of said resonant mode of interest.
Claim 5
Dependent Claim
35 words
A resonator as in claim 2 wherein said resonant mode of interest contains a plurality of peaks and wherein said input and output transducers are located over different peaks of said resonant mode of interest.
Claim 6
Dependent Claim
24 words
A magnetostatic wave resonator as in claim 1 wherein said input transducer is a microstrip conductor at a first surface of said ferrimagnetic film.
Claim 7
Dependent Claim
44 words
A resonator as in claim 5 further comprising an output transducer consisting of a microstrip conductor at a second surface of said ferrimagnetic film and located over a peak of said resonant mode of interest to strongly couple electromagnetic energy out of said mode.
Claim 8
Dependent Claim
24 words
A resonator as in claim 6 wherein said input and output transducers are located over the same peak of said resonant mode of interest.
Claim 9
Dependent Claim
54 words
A resonator as in claim 5 wherein said resonant mode of interest contains a plurality of peaks, said resonator further comprising: an output transducer consisting of a microstrip transducer at said first surface of said ferrimagnetic film, wherein said input and output transducers are located over different peaks of said resonant mode of interest.
Claim 10
Dependent Claim
52 words
A magnetostatic wave resonator as in claim 1, having at least one spurious mode, further comprising: at least one signal drain located with respect to said resonant mode of interest and said at least one spurious mode to suppress said at least one spurious mode relative to said resonant mode of interest.
Claim 11
Dependent Claim
22 words
A resonator as in claim 9 wherein said input transducer is a microstrip conductor at a first surface of said ferrimagnetic film.
Claim 12
Dependent Claim
23 words
A resonator as in claim 10 wherein said signal drain comprises a block of conductive material at a surface of said ferrimagnetic film.
Claim 13
Dependent Claim
23 words
A resonator as in claim 10 wherein said signal drain comprises a patch of conductive particles on a surface of said ferrimagnetic film.
Claim 14
Dependent Claim
23 words
A resonator as in claim 10 wherein said signal drain comprises a patch of surface defects at a surface of said ferrimagnetic film.
Claim 15
Dependent Claim
20 words
A resonator as in claim 10 wherein said signal drain comprises a groove in a surface of said ferrimagnetic film.
Claim 16
Dependent Claim
18 words
A resonator as in claim 14 wherein each groove is parallel to a side of the ferrimagnetic film.
References Cited (Backward Citations)
US4316162A
Cited
US4392115A
Cited
US4395686A
Cited
US4547754A
Cited
US4565984A
Cited
US4528529A
Cited
US4614923A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-01 | 1992-05-02 | 1992-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-01 | 1996-05-02 | 1996-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-01 | 2000-05-02 | 2000-11-01 | $7700.00 | Window Closed / Lapsed |