US3713163A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plural beam antenna
Assignee: National Aeronautics and Space Administration
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Filing: 1971-11-22
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Granted: 1973-01-23
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Expires: 1991-11-22
Abstract
Abstract An antenna capable of deriving a plurality of beams about a single boresight axis includes a focusing means, such as a parabolic reflector or a lens. Plural arrays, each including plural radially aligned antenna elements extending from the boresight axis, are located in proximity to a focal point for the focusing means. The elements of the plural arrays are independently excited. Each of the arrays is independently rotated about the boresight axis.
Inventors
- 👤 L Dod
- 👤 G Keller
- 👤 M Maxwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:47
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/12; H01Q3/16; H01Q3/18; H01Q25/00; H01Q25/007; H01Q3/24; H01Q3/245
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
85 words
An antenna capable of deriving a plurality of energy beams centered about a single boresight axis having a focal point for the beams comprising plural arrays of plural antenna elements in proximity to the focal point, means for focusing the beams on the antenna elements, said elements of each array being aligned and spaced by a different distance from the boresight axis, means for independently exciting elements of the plural arrays, and means for independently rotating each of the plural arrays about the boresight axis.
Claim 2
Dependent Claim
85 words
An antenna capable of deriving a plurality of energy beams centered about a single boresight axis having a focal point for the beams comprising plural arrays of plural antenna elements in proximity to the focal point, means for focusing the beams on the antenna elements, said elements of each array being aligned and spaced by a different distance from the boresight axis, means for independently exciting elements of the plural arrays, and means for independently rotating each of the plural arrays about the boresight axis.
Claim 3
Dependent Claim
19 words
The antenna of claim 1 wherein the elements aRe positioned so that radiation beams derived from adjacent elements overlap.
Claim 4
Dependent Claim
41 words
The antenna of claim 1 wherein a pair of said arrays is provided, one of said arrays being positioned on one side of the focal point, the other of said arrays being positioned on the other side of the focal point.
Claim 5
Dependent Claim
12 words
The antenna of claim 1 wherein the focusing means includes a reflector.
Claim 6
Dependent Claim
12 words
The antenna of claim 1 wherein the focusing means includes a lens.
Claim 7
Dependent Claim
46 words
The antenna of claim 1 wherein one of the arrays is displaced from the other arrays along the boresight axis, said one array being positioned between the focusing means and said other arrays, said one array including an element having its center on the boresight axis.
Claim 8
Dependent Claim
25 words
The antenna of claim 1 wherein the means for exciting includes switch means selectively connecting each of the elements in circuit with an active device.
Claim 9
Dependent Claim
17 words
The antenna of claim 1 wherein different arrays are located on either side of the focal point.
References Cited (Backward Citations)
US3534365A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |