US3718933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave antenna
Assignee: Thales Nederland BV
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Filing: 1971-08-11
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Granted: 1973-02-27
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Expires: 1991-08-11
Abstract
Abstract A MICROWAVE ANTENNA OF THE ARRAY ANTENNA TYPE IS PROVIDED WITH A TRANSMISSION LINE NETWORK COMPRISING TWO SUPPLY LINES FOR PRODUCING A CORRESPONDING NUMBER OF BEAMS. THE ANTENNA IS FORMED BY VARIOUS PARALLEL LINEAR ARRAYS. A SEPARATE FREQUENCY BAND IS ALLOCATED TO EACH OF THE SUPPLY LINES. THE SUPPLY LINES ARE CONNECTED TO ALL LINEAR ARRAYS BY MEANS OF FREQUENCY-SELECTIVE COUPLERS (E.G. DIPLEXERS), EACH SO DESIGNED THAT THEY FEED THE COMBINED SIGNALS OF VARIOUS FREQUENCY BANDS TO BE TRANSMITTED TO THE ASSOCIATED LINEAR ARRAYS, WHILE THEY FEED THE RECEIVED SIGNALS SEPARATED ACCORDING TO FREQUENCY BAND TO THE VARIOUS SUPPLY LINES.
Inventors
- 👤 H Huele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:04
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/22; H01Q25/00
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) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |