US3221332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Log periodic antenna with plural crossed dipoles
Assignee: BAE Systems Electronics Ltd
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Filing: 1960-04-29
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Granted: 1965-11-30
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Expires: 1980-04-29
Abstract
No abstract record available.
Inventors
- 👤 Kravis Alec
- 👤 Radford Matthew Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:39
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/28; H01Q19/30; H01Q11/00; H01Q11/02; H01Q11/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
AN OMNI-DIRECTIONAL AERIAL SYSTEM INCLUDING A PLURALITY OF DIPOLES SPACED ALONG AND CONNECTED AT THEIR INNER ENDS TO THE CONDUCTORS OF A TWO-CONDUCTOR BALANCED FEEDER, ALTERNATE DIPOLES BEING PARALLEL TO ONE ANOTHER AND AT RIGHT ANGLES TO THE OTHER ALTERNATE DIPOLES AND ALL BEING TRANSVERSE TO THE SAME LONGITUDINAL AXIS, THE SAID DIPOLES BEING OF DIFFERENT ELECTRICAL LENGTHS INCREASING SUBSTANTIALLY LOGARITHMETICALLY FROM THE CONNECTED END OF THE FEEDER TO THE OTHER END AND SPACED BY SPACINGS WHICH ALSO INCREASE LOGARITHMICALLY FROM THE SAID CONNECTED END TO THE OTHER END, AND THE DIPOLE FEEDER CONNECTIONS BEING SPIRALLED ROUND TO CROSS OVER ONE ANOTHER BETWEEN ALTERNATE DIPOLES.
Claim 2
Dependent Claim
105 words
AN OMNI-DIRECTIONAL AERIAL SYSTEM INCLUDING A PLURALITY OF DIPOLES SPACED ALONG AND CONNECTED AT THEIR INNER ENDS TO THE CONDUCTORS OF A TWO-CONDUCTOR BALANCED FEEDER, ALTERNATE DIPOLES BEING PARALLEL TO ONE ANOTHER AND AT RIGHT ANGLES TO THE OTHER ALTERNATE DIPOLES AND ALL BEING TRANSVERSE TO THE SAME LONGITUDINAL AXIS, THE SAID DIPOLES BEING OF DIFFERENT ELECTRICAL LENGTHS INCREASING SUBSTANTIALLY LOGARITHMETICALLY FROM THE CONNECTED END OF THE FEEDER TO THE OTHER END AND SPACED BY SPACINGS WHICH ALSO INCREASE LOGARITHMICALLY FROM THE SAID CONNECTED END TO THE OTHER END, AND THE DIPOLE FEEDER CONNECTIONS BEING SPIRALLED ROUND TO CROSS OVER ONE ANOTHER BETWEEN ALTERNATE DIPOLES.
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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |