US3555552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual polarized antenna system with controlled field pattern
Assignee: Individual
•
Filing: 1969-12-19
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Granted: 1971-01-12
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Expires: 1989-12-19
Abstract
Abstract A DIRECTIONAL ANTENNA SYSTEM PROVIDES BOTH VERTICAL AND HORIZONTAL POLARIZATION. A SPIRE NEAR THE TOP OF A SKYSCRAPER CARRIES A PAIR OF VERTICALLY ORIENTED DIPOLES ON OPPOSITE CORNERS. A POWER DIVIDER DELIVERS MORE ENERGY TO ONE OF THE DIPHOLES THAN TO THE OTHER. THE SPIRE ALSO CARRIES A SLOTTED RING ANTENNA HAVING FED DIRECTIONALIZING ELEMENTS AND COEXTENSIVE WITH AN EXTENSION OF ONE OF THE DIPOLES TO PROVIDE SUBSTANTIALLY THE SAME HORIZONTAL DIRECTIONALITY PATTERN FOR HORIZONTALLY POLARIZED ENERGY AS THE VERTICALLY ORIENTED DIPOLES PROVIDE FOR VERTICALLY POLARIZED ENERGY.
Inventors
- 👤 Andrew Alford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:46
CPC Classifications
H; H01; H01Q; H01Q21/00; H01Q21/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |