US4985709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetostatic wave device
Assignee: Murata Manufacturing Co Ltd
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Filing: 1989-06-12
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Granted: 1991-01-15
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Expires: 2009-06-12
Abstract
Abstract A magnetostatic wave device comprises a ferrimagnetic base material such as a thin film of YIG (yttrium iron garnet). The ferrimagnetic base material is formed on a supporting plate, for example, a GGG (gadolinium gallium garnet) substrate. On one principal surface of the thin ferrimagnetic base material, a first coupling antenna is formed. Furthermore, on one principal surface of the ferrimagnetic base material, second coupling antennas are formed on both sides of the first coupling antenna. In this magnetostatic wave device, the magnetostatic wave propagated from the first coupling antenna toward both sides of the first coupling antenna is received by the second coupling antennas on both sides of the first coupling antenna.
Inventors
- 👤 Toshio Nishikawa
- 👤 Hiroaki Tanaka
- 👤 Satoru Shinmura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:22
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/36; H01Q1/38; H01Q13/00; H01Q13/20
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
88 words
A magnetostatic wave device comprising: a ferrimagnetic base material; a first coupling antenna comprising an input coupling antenna formed on one principal surface of said ferrimagnetic base material for propagating a magnetostatic wave in opposite directions therefrom; a second coupling antenna comprising at least first and second output coupling antennas formed on opposite sides of said input coupling antenna, on one principal surface of said ferrimagnetic base material, said output coupling antennas being positioned to receive said magnetostatic wave propagated in opposite directions from the input coupling antenna.
Claim 2
Dependent Claim
88 words
A magnetostatic wave device comprising: a ferrimagnetic base material; a first coupling antenna comprising an input coupling antenna formed on one principal surface of said ferrimagnetic base material for propagating a magnetostatic wave in opposite directions therefrom; a second coupling antenna comprising at least first and second output coupling antennas formed on opposite sides of said input coupling antenna, on one principal surface of said ferrimagnetic base material, said output coupling antennas being positioned to receive said magnetostatic wave propagated in opposite directions from the input coupling antenna.
Claim 3
Dependent Claim
18 words
A magnetostatic wave device according to claim 1, wherein said ferrimagnetic base material includes a YIG thin film.
Claim 4
Dependent Claim
20 words
A magnetostatic wave device according to claim 2, which further includes a supporting plate for supporting said YIG thin film.
Claim 5
Dependent Claim
16 words
A magnetostatic wave device according to claim 3, wherein said supporting plate includes a GGG substrate.
Claim 6
Dependent Claim
26 words
A magnetostatic wave device according to claim 1, further comprising at least one additional output coupling antenna formed on each side of said input coupling antenna.
Claim 7
Dependent Claim
18 words
A magnetostatic wave device according to claim 5, wherein said ferrimagnetic base material includes a YIG thin film.
Claim 8
Dependent Claim
20 words
A magnetostatic wave device according to claim 6, which further includes a supporting plate for supporting said YIG thin film.
Claim 9
Dependent Claim
16 words
A magnetostatic wave device according to claim 7, wherein said supporting plate includes a GGG substrate.
Claim 10
Dependent Claim
47 words
A magnetostatic wave device according to claim 1, wherein at least one additional input coupling antenna is formed on the principal surface of said ferrimagnetic base material, said output coupling antennas being formed between said input coupling antennas and on opposite sides of said input coupling antennas.
Claim 11
Dependent Claim
18 words
A magnetostatic wave device according to claim 9, wherein said ferrimagnetic base material includes a YIG thing film.
Claim 12
Dependent Claim
20 words
A magnetostatic wave device according to claim 10, which further includes a supporting plate for supporting said YIG thin film.
Claim 13
Dependent Claim
16 words
A magnetostatic wave device according to claim 11, wherein said supporting plate includes a GGG substrate.
Claim 14
Dependent Claim
92 words
A magnetostatic wave device comprising: a ferrimagnetic base material; a first coupling antenna formed on one principal surface of said ferrimagnetic base material, and a signal input means coupled to said first coupling antenna; and a separate second coupling antenna formed on said principal surface of said ferrimagnetic base material, and spaced from each side of said first coupling antenna, and a signal output means coupled to receive signals from said second coupling antennas, said second coupling antennas being positioned to receive waves propagated from opposite sides of said input coupling antenna.
Claim 15
Dependent Claim
92 words
A magnetostatic wave device comprising: a ferrimagnetic base material; a first coupling antenna formed on one principal surface of said ferrimagnetic base material, and a signal input means coupled to said first coupling antenna; and a separate second coupling antenna formed on said principal surface of said ferrimagnetic base material, and spaced from each side of said first coupling antenna, and a signal output means coupled to receive signals from said second coupling antennas, said second coupling antennas being positioned to receive waves propagated from opposite sides of said input coupling antenna.
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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) | 1994-01-14 | 1994-07-16 | 1995-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-14 | 1998-07-16 | 1999-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-14 | 2002-07-16 | 2003-01-15 | $7700.00 | Window Closed / Lapsed |