Patent US4308539A successfully refreshed from Google Patents.
US4308539A
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US
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Compensated phased array antenna
Assignee: Raytheon Co
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Filing: 1980-01-04
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Granted: 1981-12-29
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Expires: 2000-01-04
Abstract
Abstract A compensated phased array antenna is shown wherein the drive to each one of a plurality of phase shifters is changed to compensate for changes in operating conditions.
Inventors
- 👤 James D. Birch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:53
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/002; H01Q3/00; H01Q3/44; H01Q3/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
In a radar using a phased array antenna incorporating a phase shifter in the path of electromagnetic energy to each radiating element of such antenna, each such phase shifter being individually controllable by a driver and having electromagnetic characteristics which change with ambient temperature, the improvement comprising: (a) means for adjusting the control signal to each driver to compensate for any change in the electromagnetic characteristics of the associated phase shifter due to change in ambient temperature, such means comprising a read-only memory addressable by a signal indicative of ambient temperature correspondingly to adjust the control signal to each one of the drivers thereby separately to compensate each one of the phase shifters for any change in ambient temperature; and (b) means for producing the signal indicative of ambient temperature.
Claim 2
Dependent Claim
130 words
In a radar using a phased array antenna incorporating a phase shifter in the path of electromagnetic energy to each radiating element of such antenna, each such phase shifter being individually controllable by a driver and having electromagnetic characteristics which change with ambient temperature, the improvement comprising: (a) means for adjusting the control signal to each driver to compensate for any change in the electromagnetic characteristics of the associated phase shifter due to change in ambient temperature, such means comprising a read-only memory addressable by a signal indicative of ambient temperature correspondingly to adjust the control signal to each one of the drivers thereby separately to compensate each one of the phase shifters for any change in ambient temperature; and (b) means for producing the signal indicative of ambient temperature.
References Cited (Backward Citations)
US3611401A
Cited
US3885237A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-28 | 1985-06-29 | 1985-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-28 | 1989-06-29 | 1989-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-28 | 1993-06-29 | 1993-12-29 | $7700.00 | Window Closed / Lapsed |