US3113277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-section asymmetrical coupler
Assignee: Narda Microwave Corp
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Filing: 1960-05-02
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Granted: 1963-12-03
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Expires: 1980-05-02
Abstract
No abstract record available.
Inventors
- 👤 Stuart D Casper
- 👤 James E Mcfarland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:50
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/12; H01P5/16; H01P5/18; H01P5/184; H01P5/185
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
A MICROWAVE STRIP LINE DIRECTIONAL COUPLER COMPRISING A GROUND PLANE CONDUCTOR, A FIRST STRIP-LIKE CONDUCTOR ADJACENT SAID GROUND PLANE CONDUCTOR FOR PROVIDING A FIRST STRIP TRANSMISSION LINE, A SECOND STRIP-LIKE CONDUCTOR ADJACENT SAID GROUND PLANE CONDUCTOR FOR PROVIDING A SECOND STRIP TRANSMISSION LINE, EACH OF SAID STRIP-LIKE CONDUCTORS BEING COUPLED TO THE OTHER OVER ITS ENTIRE LENGTH, EACH OF SAID TRANSMISSION LINES HAVING A FIRST END SECTION AND A SECOND END SECTION, EACH OF SAID END SECTIONS BEING SUBSTANTIALLY ONE-QUARTER WAVELENGTH LONG AT MID-BAND OPERATING FREQUENCY FOR THE COUPLER, THE PHYSICAL SPACING OF SAID END SECTIONS BEING SUCH THAT THE COEFFICIENT OF COUPLING BETWEEN SAID FIRST END SECTIONS IS GREATER THAN THE COEFFICIENT OF COUPLING BETWEEN SAID SECOND END SECTIONS, SAID END SECTIONS OF SAID FIRST LINE BEING SUBSTANTIALLY PARALLEL TO SAID END SECTIONS OF SAID SECOND LINE, AND INPUT AND OUTPUT COAXIAL LINE CONNECTORS TERMINATING THE END SECTIONS OF SAID FIRST STRIP TRANSMISSION LINE.
Claim 2
Dependent Claim
155 words
A MICROWAVE STRIP LINE DIRECTIONAL COUPLER COMPRISING A GROUND PLANE CONDUCTOR, A FIRST STRIP-LIKE CONDUCTOR ADJACENT SAID GROUND PLANE CONDUCTOR FOR PROVIDING A FIRST STRIP TRANSMISSION LINE, A SECOND STRIP-LIKE CONDUCTOR ADJACENT SAID GROUND PLANE CONDUCTOR FOR PROVIDING A SECOND STRIP TRANSMISSION LINE, EACH OF SAID STRIP-LIKE CONDUCTORS BEING COUPLED TO THE OTHER OVER ITS ENTIRE LENGTH, EACH OF SAID TRANSMISSION LINES HAVING A FIRST END SECTION AND A SECOND END SECTION, EACH OF SAID END SECTIONS BEING SUBSTANTIALLY ONE-QUARTER WAVELENGTH LONG AT MID-BAND OPERATING FREQUENCY FOR THE COUPLER, THE PHYSICAL SPACING OF SAID END SECTIONS BEING SUCH THAT THE COEFFICIENT OF COUPLING BETWEEN SAID FIRST END SECTIONS IS GREATER THAN THE COEFFICIENT OF COUPLING BETWEEN SAID SECOND END SECTIONS, SAID END SECTIONS OF SAID FIRST LINE BEING SUBSTANTIALLY PARALLEL TO SAID END SECTIONS OF SAID SECOND LINE, AND INPUT AND OUTPUT COAXIAL LINE CONNECTORS TERMINATING THE END SECTIONS OF SAID FIRST STRIP TRANSMISSION LINE.
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) | 1966-12-02 | 1967-06-03 | 1967-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-02 | 1971-06-03 | 1971-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-02 | 1975-06-03 | 1975-12-03 | $7700.00 | Window Closed / Lapsed |