US4010471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polarization rotator for phase array antennas
Assignee: United States Department of the Army
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Filing: 1975-06-20
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Granted: 1977-03-01
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Expires: 1995-06-20
Abstract
Abstract The polarization control of the antenna is obtained by space feeding the nals through a polarization control rotator to a monopulse feedhorn.
Inventors
- 👤 Bob L. Smith, deceased
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:23
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/44; H01Q3/46; H01Q15/00; H01Q15/24; H01Q15/242; H01Q15/246
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A system comprising feedhorn subsystem; a two dimensional array of polarization insensitive antenna elements arranged as an adjustable feed through lens; electromagnetic energy being space-fed between said subsystem and said antenna elements; polarization control means connected to said feedhorn subsystem so as to control the polarization of said energy; said polarization control means is a polarization rotator spatially located between said subsystem and said antenna elements; said feedhorn subsystem comprises a plurality of horn monopulse feeds; and said rotator being located adjacent to said plurality of feeds.
Claim 2
Independent Claim
87 words
A system comprising feedhorn subsystem; a two dimensional array of polarization insensitive antenna elements arranged as an adjustable feed through lens; electromagnetic energy being space-fed between said subsystem and said antenna elements; polarization control means connected to said feedhorn subsystem so as to control the polarization of said energy; said polarization control means is a polarization rotator spatially located between said subsystem and said antenna elements; said feedhorn subsystem comprises a plurality of horn monopulse feeds; and said rotator being located adjacent to said plurality of feeds.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-02-29 | 1980-08-30 | 1981-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-29 | 1984-08-30 | 1985-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-29 | 1988-08-30 | 1989-03-01 | $7700.00 | Window Closed / Lapsed |