US3977003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conformal helmet antenna
Assignee: United States Department of the Navy
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Filing: 1974-10-15
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Granted: 1976-08-24
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Expires: 1994-10-15
Abstract
Abstract An antenna which conforms to the surface of a non-metallic helmet for man-the-move communications. A metallic electronics housing mounted on the helmet and judiciously arranged antenna fingers comprise the radiating structure which is operable over a wide band of frequencies without tuning.
Inventors
- 👤 Joseph E. Kershaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:24
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/27; H01Q1/273; H01Q1/276; A; A42; A42B; A42B3/00; A42B3/04; A42B3/30; H04; H04B; H04B1/00; H04B1/38; H04B1/3827; H04B1/385; H04B2001/3866
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
85 words
In a non-metallic helmet, an antenna comprising: a metallic housing for enclosing transmitter-receiver electronics mounted on the exterior of said helmet; a plurality of elongated metallic fingers bonded to the outer surface of said helmet and conforming to the shape of said helmet; all of said fingers being physically connected at a single point adjacent to said housing and diverging outwardly therefrom, said fingers being operably coupled to said housing; whereby said housing and said fingers form a broad band radiating structure with mixed polarization.
Claim 2
Dependent Claim
85 words
In a non-metallic helmet, an antenna comprising: a metallic housing for enclosing transmitter-receiver electronics mounted on the exterior of said helmet; a plurality of elongated metallic fingers bonded to the outer surface of said helmet and conforming to the shape of said helmet; all of said fingers being physically connected at a single point adjacent to said housing and diverging outwardly therefrom, said fingers being operably coupled to said housing; whereby said housing and said fingers form a broad band radiating structure with mixed polarization.
Claim 3
Dependent Claim
14 words
The structure of claim 1 wherein there are three of said plurality of fingers.
Claim 4
Dependent Claim
16 words
The apparatus of claim 1 further including a reactive compensation element connected to said radiating structure.
Claim 5
Dependent Claim
21 words
The apparatus of claim 1 wherein said plurality of fingers diverge rearwardly and downwards from said point adjacent to said housing.
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) | 1979-08-24 | 1980-02-23 | 1980-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-24 | 1984-02-23 | 1984-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-24 | 1988-02-23 | 1988-08-24 | $7700.00 | Window Closed / Lapsed |