US3196443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circularly polarized dipole antenna
Assignee: United Shoe Machinery Corp
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Filing: 1962-08-28
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Granted: 1965-07-20
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Expires: 1982-08-28
Abstract
No abstract record available.
Inventors
- 👤 John E Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:15
CPC Classifications
H; H01; H01Q; H01Q21/00; H01Q21/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
IN AN ANTENNA, A RIGID COAXIAL TRANSMISSTION LINE, FOUR STUBS EXTENDING RADIALLY AT 90* INTERVALS FROM A COMMON CENTRAL FEED POINT AT AN END OF SAID LINE, TWO OF SAID STRUBS BEING CONNECTED TO EACH CONDUCTOR OF SAID LINE, FOUR RADIALLY DISPOSED CONDUCTIVE ARMS OF EQUAL LENGTH LONGER THAN THE STUBS, EACH ARM BEING CARRIED BY A STUB AND EXTENDING PARALLEL THERETO FROM ITS BASE AND SEPARATED THEREFROM BY A THIN LAYER OF INSOLATION, THEREBY FORMING TWO PAIRS OF ORTHOGONALLY RELATED DIPOLES WITH A TRANSMISSION LINE SECTION AT THE BASE OF EACH ARM ELECTRICALLY IN SERIES BETWEEN THE ARM AND A CONDUCTOR OF THE COAXIAL LINE AND MEANS FOR ELECTRICALLY CONNECTING THE STUBS AND ARMS OF ONE DIPOLE AT A POINT SPACED FROM THE BASE THEREOF WHEREBY AT A GIVEN OPERATING FREQUENCY THE INPUT IMPEDENCE OF ONE DISPOLE ACROSS THE INNER ENDS OF THE STUBS THEREOF HAS A REACTIVE COMPONENT EQUAL TO AND OF OPPOSITE SIGN TO THE CORRESPONDING INPUT IMPEDANCE OF THE OTHER DIPOLE.
Claim 2
Dependent Claim
165 words
IN AN ANTENNA, A RIGID COAXIAL TRANSMISSTION LINE, FOUR STUBS EXTENDING RADIALLY AT 90* INTERVALS FROM A COMMON CENTRAL FEED POINT AT AN END OF SAID LINE, TWO OF SAID STRUBS BEING CONNECTED TO EACH CONDUCTOR OF SAID LINE, FOUR RADIALLY DISPOSED CONDUCTIVE ARMS OF EQUAL LENGTH LONGER THAN THE STUBS, EACH ARM BEING CARRIED BY A STUB AND EXTENDING PARALLEL THERETO FROM ITS BASE AND SEPARATED THEREFROM BY A THIN LAYER OF INSOLATION, THEREBY FORMING TWO PAIRS OF ORTHOGONALLY RELATED DIPOLES WITH A TRANSMISSION LINE SECTION AT THE BASE OF EACH ARM ELECTRICALLY IN SERIES BETWEEN THE ARM AND A CONDUCTOR OF THE COAXIAL LINE AND MEANS FOR ELECTRICALLY CONNECTING THE STUBS AND ARMS OF ONE DIPOLE AT A POINT SPACED FROM THE BASE THEREOF WHEREBY AT A GIVEN OPERATING FREQUENCY THE INPUT IMPEDENCE OF ONE DISPOLE ACROSS THE INNER ENDS OF THE STUBS THEREOF HAS A REACTIVE COMPONENT EQUAL TO AND OF OPPOSITE SIGN TO THE CORRESPONDING INPUT IMPEDANCE OF THE OTHER DIPOLE.
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) | 1968-07-19 | 1969-01-18 | 1969-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-19 | 1973-01-18 | 1973-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-19 | 1977-01-18 | 1977-07-20 | $7700.00 | Window Closed / Lapsed |