US3832715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wide angle scanning and multibeam single reflector
Assignee: Northrop Grumman Systems Corp
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Filing: 1971-09-23
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Granted: 1974-08-27
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Expires: 1991-09-23
Abstract
Abstract An antenna reflector system wherein the reflector remains fixed during scanning operations and the feed, which is located in a protective equipment shelter remote from the reflector, is moved on a special trajectory in order to provide the required scanning with minimal degradation in gain. A feed positioner provides the requisite movement of the feed along x-, y- and z- axes. The reflector is preferably in the form of a shallow, offset parabola.
Inventors
- 👤 M Afifi
- 👤 A Jacobs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:34
CPC Classifications
H; H01; H01Q; H01Q25/00; H01Q25/007; H01Q3/00; H01Q3/12; H01Q3/16; H01Q3/18
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
78 words
An antenna scanning system comprising a reflector which is fixed in position during scanning, a feed means separate from and spaced from said reflector for transmitting electromagnetic energy to or receiving electromagnetic energy from said reflector, an enclosure remote from said reflector for housing said feed means at a location remote from said reflector, and positioning means for varying the position of said feed means within said enclosure relative to said reflector to provide scanning of the reflector.
Claim 2
Dependent Claim
78 words
An antenna scanning system comprising a reflector which is fixed in position during scanning, a feed means separate from and spaced from said reflector for transmitting electromagnetic energy to or receiving electromagnetic energy from said reflector, an enclosure remote from said reflector for housing said feed means at a location remote from said reflector, and positioning means for varying the position of said feed means within said enclosure relative to said reflector to provide scanning of the reflector.
Claim 3
Dependent Claim
14 words
A system as claimed in claim 1 wherein said antenna comprises an offset parabola.
Claim 4
Dependent Claim
15 words
A system as claimed in claim 1 wherein said antenna comprises a shaped offset parabola.
Claim 5
Dependent Claim
27 words
A system as claimed in claim 2 wherein said positioning means comprises means for varying the position of the feed means along the x-, y- and z-axes.
Claim 6
Dependent Claim
28 words
A system as claimed in claim 4 wherein said positioning means includes a carriage for mounting said feed means and track means along which said carriage is movable.
Claim 7
Dependent Claim
21 words
A system as claimed in claim 5 wherein said positioning means includes means for indicating the position of the feed means.
Claim 8
Dependent Claim
16 words
A system as claimed in claim 2 wherein said feed means comprises a ridged wave guide.
Claim 9
Dependent Claim
33 words
A system as claimed in claim 1 wherein said enclosure comprises a shelter which includes space for tracking equipment and wherein said reflector is separately mounted by support means spaced from said shelter.
Claim 10
Dependent Claim
76 words
A system as claimed in claim 6 wherein said positioning means includes a platform and means for raising and lowering said platform within said carriage and means for providing movement of said feed means on said platform in a direction perpendicular both to the direction of movement of said feed means on said platform in a direction perpendicular both to the direction of movement of said carriage and to said direction of movement of said platform.
Claim 11
Dependent Claim
28 words
A system as claimed in claim 1 wherein said enclosure houses a plurality of said feed means for providing multi-beam operation, said reflector comprising a shallow, offset parabola.
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) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |