Patent US3560976A successfully refreshed from Google Patents.
US3560976A
Expired / Lapsed
US
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Feed system
Assignee: RCA Corp
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Filing: 1968-08-21
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Granted: 1971-02-02
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Expires: 1988-08-21
Abstract
Abstract A FEED SYSTEM SUITABLE FOR SATELITE COMMUNICATION EARTH STATION ANTENNAS AND WHICH INCLUDES A THREE PORT POLARIZER ASSEMBLY, MULTIMODE HORN ASSEMBLY AND TRACKING DIFFERENCE MODE CIRCUITRY IS DESCRIBED. THE THREE PORT POLARIZER ASSEMBLY IS COUPLED TO THE HORN ASSEMBLY FOR PROVIDING FULL POLARIZATION MODE FLEXIBILITY FOR THE SUM MODES. THE MULTIMODE HORN ASSEMBLY PROVIDES EXCITATION AND CONTROL OF BOTH THE SUM AND DIFFERENCE MODES AND INHIBITS THE UNDERSIRABLE MODES. THE TRACKING DIFFERENCE MODE CIRCUITRY IS COUPLED TO THE MULTIMODE HORN TO PROCESS DIFFERENCE MODES AND PROVIDE THE AZIMUTH AND ELEVATION INFORMATION FOR MONOPULSE TRACKING.
Inventors
- 👤 Peter Foldes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:38
CPC Classifications
H; H01; H01Q; H01Q25/00; H01Q25/04; G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/42; G01S13/44; G01S13/4409; G01S3/00; G01S3/02; G01S3/14; G01S3/146
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |