US3831114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Encapsulated microstrip circulator with mode elimination means
Assignee: RCA Corp
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Filing: 1973-04-30
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Granted: 1974-08-20
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Expires: 1993-04-30
Abstract
Abstract A microstrip circulator mounted within a metallic enclosure includes a dielectric substrate, a single ground planar conductor on one surface of the substrate and a plurality of narrow striplike conductors extending from a common junction region on the opposite surface of the substrate. The substrate at the junction region includes gyromagnetic material so that when a D.C. magnetic field is applied in the direction perpendicular to the substrate, circulator action is provided. A metallic post positioned between the junction region of the narrow conductors and a wall of the metallic enclosure eliminates unwanted radiation modes.
Inventors
- 👤 R Paglione
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:31
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/32; H01P1/38; H01P1/383; H01P1/387; H01P1/16
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
128 words
In a microstrip circulator mounted within a metallic enclosure wherein said microstrip circulator includes a dielectric substrate, a single ground planar conductor on one surface of said substrate in contact with one wall of said enclosure and a plurality of narrow strip-like conductors extending from a common conductive region on the opposite surface of said substrate, said substrate adjacent the common conductive region including gyromagnetic material, said circulator including means for biasing said body of gyromagnetic material, the improvement therewith for elimination of unwanted TE and TM modes associated with box resonances within said enclosure comprising: a metallic conductor having a diameter no greater than that of the common region coupled between said common region and a second wall of said metallic enclosure extending above the common region.
Claim 2
Dependent Claim
128 words
In a microstrip circulator mounted within a metallic enclosure wherein said microstrip circulator includes a dielectric substrate, a single ground planar conductor on one surface of said substrate in contact with one wall of said enclosure and a plurality of narrow strip-like conductors extending from a common conductive region on the opposite surface of said substrate, said substrate adjacent the common conductive region including gyromagnetic material, said circulator including means for biasing said body of gyromagnetic material, the improvement therewith for elimination of unwanted TE and TM modes associated with box resonances within said enclosure comprising: a metallic conductor having a diameter no greater than that of the common region coupled between said common region and a second wall of said metallic enclosure extending above the common region.
Claim 3
Dependent Claim
29 words
The combination as claimed in claim 1 wherein said metallic conductor is a symmetrical post connected directly between said second wall of said metallic enclosure and said common region.
Claim 4
Dependent Claim
17 words
The combination as claimed in claim 1 wherein said second wall is directly opposite said one wall.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |