US4827269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus to maintain arbitrary polarization stabilization of an antenna
Assignee: Unisys Corp
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Filing: 1986-07-07
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Granted: 1989-05-02
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Expires: 2006-07-07
Abstract
Abstract An apparatus for maintaining an arbitrary orientation of the polarization of an antenna, such as an airborne microwave antenna, by using antenna pointing information and platform (aircraft) attitude information to position the input/feed signal.
Inventors
- 👤 Lowell N. Shestag
- 👤 John W. Zscheile, Jr.
- 👤 Alan E. Lundquist
- 👤 Glen S. Kirkpatrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:15
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/18; H01Q21/00; H01Q21/24; H01Q21/245
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
129 words
An antenna system which is capable of maintaining isolation between a pair of orthogonally polarized signals comprising, first means for operating on signals supplied thereto, orthomode transducer means for supplying signals to said first means, power means for supplying signals to said orthomode transducer means, control means for supplying signals to said power means for controlling the operation of said power means and the signals which are supplied to said orthomode transducer means by said power means, position sensing means for sensing the position of said antenna system, and attitude sensing means for sensing the attitude of said antenna system, said position sensing means and said attitude sensing means connected to supply input signals to said control means to produce control signals which are supplied to said power means.
Claim 2
Dependent Claim
129 words
An antenna system which is capable of maintaining isolation between a pair of orthogonally polarized signals comprising, first means for operating on signals supplied thereto, orthomode transducer means for supplying signals to said first means, power means for supplying signals to said orthomode transducer means, control means for supplying signals to said power means for controlling the operation of said power means and the signals which are supplied to said orthomode transducer means by said power means, position sensing means for sensing the position of said antenna system, and attitude sensing means for sensing the attitude of said antenna system, said position sensing means and said attitude sensing means connected to supply input signals to said control means to produce control signals which are supplied to said power means.
Claim 3
Dependent Claim
16 words
The system recited in claim 1 wherein, said power means is an electronically controlled power mean.
Claim 4
Dependent Claim
13 words
The system recited in claim 1 wherein, said control means includes computer means.
Claim 5
Dependent Claim
33 words
The system recited in claim 3 wherein, said computer means determines the actual tilt, if any, of the antenna system and produces control signals to compensate therefor when supplied to said power means.
Claim 6
Dependent Claim
44 words
The system recited in claim 4 wherein, said power means receives said control signals from said computer means and operates to convert portions of the signals supplied by said power means to said orthomode transducer means thereby to cancel the effect of actual tilt.
Claim 7
Dependent Claim
19 words
The system recited in claim 3 wherein, said computer means performs a real-time multiplication process for producing control signals.
Claim 8
Dependent Claim
31 words
The system recited in claim 1 wherein, said orthomode transducer means receives signals with different polarization from said power means such that said signals are isolated from each other by polarization.
Claim 9
Dependent Claim
16 words
The system recited in claim 1 wherein, said first means includes at least a feed horn.
Claim 10
Dependent Claim
32 words
The system recited in claim 1 including, antenna dish means mounted to said first means such that said first means and said antenna dish means are movable with respect to each other.
Claim 11
Dependent Claim
14 words
The system recited in claim 1 including, platform means for supporting said antenna system.
Claim 12
Dependent Claim
35 words
The system recited in claim 1 wherein, at least one of said position sensing means and said altitude sensing means is capable of performing electrical sensing and supplying electrical input signals to said computer means.
Claim 13
Dependent Claim
17 words
The system recited in claim 1 including, source means for supplying input signals to said first means.
Claim 14
Dependent Claim
17 words
The system recited in claim 12 wherein, said source means comprises a datalink with an input/output capability.
Claim 15
Dependent Claim
23 words
The system recited in claim 1 including, a pair of orthogonal input ports connected between said power means and said orthomode transducer means.
Claim 16
Dependent Claim
14 words
The system recited in claim 1 wherein, said power means includes power splitter circuitry.
Claim 17
Dependent Claim
34 words
The system recited in claim 15 wherein, said power splitter circuitry includes a pair of hybrid circuits connected to each other, and phase shifting means connected to each of said pair of hybrid circuits.
Claim 18
Dependent Claim
18 words
The system recited in claim 16 including, phase trimmers connected to the output of said power splitter circuitry.
References Cited (Backward Citations)
US2571129A
Cited
US3019429A
Cited
US2881432A
Cited
US3317858A
Cited
US3375523A
Cited
US3519960A
Cited
US4173762A
Cited
US4639695A
Cited
US4656484A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-01 | 1992-10-31 | 1993-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-01 | 1996-10-31 | 1997-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-01 | 2000-10-31 | 2001-05-02 | $7700.00 | Window Closed / Lapsed |