US3740675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Yig filter having a single substrate with all transmission line means located on a common surface thereof
Assignee: Westinghouse Electric Corp
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Filing: 1970-08-17
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Granted: 1973-06-19
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Expires: 1990-08-17
Abstract
Abstract One or more non-overlapping transmission line conductors fabricated on one planar surface of a single slab of an electric material mounted on a ground plane. At least one YIG resonator element is located in a cavity formed in the surface of the substrate facing the ground plane. The YIG resonator element, moreover, is positioned in close proximity to said one or more transmission line conductors a selected distance below the outer surface of the substrate and below the transmission line circuitry.
Inventors
- 👤 R Moore
- 👤 T Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:05
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/20; H01P1/215; H01P1/218
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
129 words
A magnetic tunable microstrip transmission line filter, comprising in combination: a. dielectric substrate means having inner and outer faces; b. ground plane means having inner and outer faces, said outer face thereof abutting the inner face of said dielectric substrate means; c. first and second microstrip transmission line means for transmitting electromagnetic wave energy located on said outer face of said substrate means; d. ferrimagnetic resonator means positioned to selectively couple said electromagnetic wave energy between said first and second microstrip transmission line means; e. means for magnetically biasing said ferrimagnetic resonator means; wherein f. said first and second transmission lines include substantially equal parallel line portions and wherein said resonator means comprises at least one yttrium iron garnet sphere located in close proximity to said parallel line portions.
Claim 2
Dependent Claim
129 words
A magnetic tunable microstrip transmission line filter, comprising in combination: a. dielectric substrate means having inner and outer faces; b. ground plane means having inner and outer faces, said outer face thereof abutting the inner face of said dielectric substrate means; c. first and second microstrip transmission line means for transmitting electromagnetic wave energy located on said outer face of said substrate means; d. ferrimagnetic resonator means positioned to selectively couple said electromagnetic wave energy between said first and second microstrip transmission line means; e. means for magnetically biasing said ferrimagnetic resonator means; wherein f. said first and second transmission lines include substantially equal parallel line portions and wherein said resonator means comprises at least one yttrium iron garnet sphere located in close proximity to said parallel line portions.
Claim 3
Dependent Claim
26 words
The invention as defined by claim 1 wherein said sphere is located between said parallel line portions beneath said outer face of said dielectric substrate means.
Claim 4
Dependent Claim
83 words
The invention as defined by claim 1 wherein said first and second transmission line means comprise first and second line conductors, and a short circuit conductor contacting said first and second line conductors, said first and second line conductors and said short circuit conductor being located in substantially a common plane on said outer face of said dielectric substrate means, and wherein said resonator means comprises at least one YIG resonator element located in close proximity to said first and second line conductors.
Claim 5
Dependent Claim
23 words
The invention as defined by claim 3 wherein said at least one YIG resonator is located directly beneath at least one line conductor.
Claim 6
Dependent Claim
81 words
The invention as defined by claim 1 wherein said first and second transmission line means comprise first and second line conductors, and a short circuit conductor contacting said first and second line conductors, said first and second line conductors and said short circuit conductor being located in substantially a common plane on said outer face of said dielectric substrate means, wherein said resonator means comprises a plurality of YIG resonators located in close proximity to said first and second line conductors.
Claim 7
Dependent Claim
35 words
The invention as defined by claim 5 wherein said plurality of YIG resonators are comprised of a first and a second sphere of single crystal yttrium-iron-garnet respectively located beneath said first and second line conductors.
Claim 8
Dependent Claim
66 words
The invention as defined by claim 1 wherein said first and second transmission line means comprise first and second line conductors located in substantially a common plane on said outer face of said dielectric substrate and passing through said dielectric means at a point in proximity to said resonator means and respectively terminating in an electrical short circuit on said outer face of said ground plane.
Claim 9
Dependent Claim
34 words
The invention as defined by claim 7 wherein said resonator means comprises at least one YIG resonator element located in close proximity to said first and second line conductor and said electrical short circuit.
Claim 10
Dependent Claim
17 words
The invention as defined by claim 7 wherein said resonator means comprises a plurality of YIG resonators.
Claim 11
Dependent Claim
48 words
The invention as defined by claim 9 whereiN said plurality of YIG resonators comprises at least three YIG resonators arranged in a row beneath said outer face of said substrate substantially perpendicular to said first and second line conductor and within a boundary defined by said line conductors.
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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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |