US3979755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating lens antenna seeker-head
Assignee: United States Department of the Army
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Filing: 1974-12-17
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Granted: 1976-09-07
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Expires: 1994-12-17
Abstract
Abstract A rotating lens antenna seeker-head provides conical scan capability for anntenna system while simultaneously providing a two axis scan capability by positioning rotating lens in front of a microwave antenna. A pair of rotatable lens are disposed in parallel across the beam front of the antenna system to refract the microwave beam away from the antenna boresight, providing variable scanning modes. The third wedge provides the conical scan pattern for the antenna regardless of the position of the two axis wedges.
Inventors
- 👤 Roger W. Sandoz
- 👤 Myron M. Rosenthal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:56
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/12; H01Q3/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
112 words
In a radar system wherein a beam of microwave energy is transmitted from an antenna through a radome, the improvement comprising: a plurality of rotatable lenses disposed in parallel within said radome between said antenna and said radome for redirecting microwave energy impinging thereon, said plurality of rotatable lenses are first, second, and third wedges disposed in respective parallel planes across the beam path of said antenna with said first wedge being positioned between said second and third wedges, said first wedge being constantly rotatable for providing a conical scan pattern, and said second and third wedges being rotatable to adjustably offset the antenna beam a predetermined distance from the antenna boresight.
Claim 2
Dependent Claim
112 words
In a radar system wherein a beam of microwave energy is transmitted from an antenna through a radome, the improvement comprising: a plurality of rotatable lenses disposed in parallel within said radome between said antenna and said radome for redirecting microwave energy impinging thereon, said plurality of rotatable lenses are first, second, and third wedges disposed in respective parallel planes across the beam path of said antenna with said first wedge being positioned between said second and third wedges, said first wedge being constantly rotatable for providing a conical scan pattern, and said second and third wedges being rotatable to adjustably offset the antenna beam a predetermined distance from the antenna boresight.
Claim 3
Dependent Claim
49 words
In a radar system as set forth in claim 1 the further improvement wherein said wedges are dielectric to microwave energy, each of said wedges have first and second opposite edges that are respectively thick and thin, with flat surfaces therebetween, and said wedges are circular around the edges.
Claim 4
Dependent Claim
42 words
In a radar system as set forth in claim 1 the improvement wherein said second and third wedges are independently rotatable to adjustably refract the beam variable degrees away from the antenna boresight during said conical scan to provide plural scanning modes.
Claim 5
Dependent Claim
49 words
In a radar system as set forth in claim 3 the improvement wherein said second and third wedges have identical slopes for providing a minimum refraction displacement parallel with the antenna boresight when the wedges are positioned such that like edges are rotated 180° with respect to each other.
Claim 6
Dependent Claim
25 words
In a radar system as set forth in claim 3 wherein said second and third wedges have different slopes for providing said plural scanning modes.
References Cited (Backward Citations)
US3226721A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |