US3718932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined multi-polarization loopstick and whip antenna
Assignee: United States Department of the Army
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Filing: 1971-06-01
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Granted: 1973-02-27
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Expires: 1991-06-01
Abstract
Abstract A RECEIVING ANTENNA ASSEMBLY FOR MITIGATING SIGNAL FADING AND CANCELLATION CAUSED BY THE DEGRADING EFFECTS OF MULTIPATHS AND SCATTER IN JUNGLE, MOUNTAIN OR URBAN ENVIRONMENTS WHICH ANTENNA HAS THREE MUTUALL-PERPENDICULAR, MULTI-POLARIZATION FERRITE LOOPSTICKS FOR SENSING H FIELD SIGNAL ENERGY AND A WHIP ANTENNA FOR SENSING E FIELD SIGNAL ENERGY, AND SELECTION MEANS FOR CHOOSING AMONG THE SIGNAL ENERGIES SENSED BY THE FERRITE LOOPSTICKS AND THE WHIP ANTENNA.
Inventors
- 👤 K Ikrath
- 👤 M Acker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:31
CPC Classifications
H; H01; H01Q; H01Q21/00; H01Q21/24; H04; H04B; H04B7/00; H04B7/02; H04B7/10
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) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |