Patent US3268890A successfully refreshed from Google Patents.
US3268890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scanning and eliminating multiple responses in a grating lobe antenna array
Assignee: Lockheed Martin Corp
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Filing: 1963-05-01
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Granted: 1966-08-23
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Expires: 1983-05-01
Abstract
No abstract record available.
Inventors
- 👤 Warren A Birge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:04
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
AN ANTENNA SCANNING ARRANGEMENT FOR USE WITH TRANSMIT AND RECEIVE ANTENNA ARRAYS: (A) SAID ARRAYS EACH HAVING ANTENNA ELEMENTS THEREON; (B) SAID ELEMENTS OF EACH ARRAY BEING PREDETERMINEDLY POSITIONED SO AS TO RESPECTIVELY CREATE TRANSMIT AND RECEIVE PATTERNS EACH HAVING A PLURALITY OF SPACED GRATING LOBES; (C) ONE OF SAID PATTERNS HAVING A LOBE SPACING WHICH IS INCOMMENSURATE WITH THE LOPE SPACING OF THE OTHER PATTERN; (D) MEANS FOR SELECTIVELY ALIGNING A LOBE OF SAID ONE PATTERN WITH A LOBE OF SAID OTHER PATTERN SO AS TO PRODUCE AN UNAMBIGUOUS PRODUCT GRATING LOBE PATTERN HAVING A SINGLE REINFORCED GRATING LOBE; (E) MEANS FOR STEERING SAID REINFORCED LOBE OVER AN ANGULAR SECTOR WHICH IS SUBSTANTIALLY SMALLER THAN THE TOTAL AREA TO BE SCANNED; AND (F) SAID ALIGNING MEANS INCLUDING SECOND STEERING MEANS CAUSING SAID PRODUCT PATTERN TO BE REINFORCED
Claim 2
Dependent Claim
138 words
AN ANTENNA SCANNING ARRANGEMENT FOR USE WITH TRANSMIT AND RECEIVE ANTENNA ARRAYS: (A) SAID ARRAYS EACH HAVING ANTENNA ELEMENTS THEREON; (B) SAID ELEMENTS OF EACH ARRAY BEING PREDETERMINEDLY POSITIONED SO AS TO RESPECTIVELY CREATE TRANSMIT AND RECEIVE PATTERNS EACH HAVING A PLURALITY OF SPACED GRATING LOBES; (C) ONE OF SAID PATTERNS HAVING A LOBE SPACING WHICH IS INCOMMENSURATE WITH THE LOPE SPACING OF THE OTHER PATTERN; (D) MEANS FOR SELECTIVELY ALIGNING A LOBE OF SAID ONE PATTERN WITH A LOBE OF SAID OTHER PATTERN SO AS TO PRODUCE AN UNAMBIGUOUS PRODUCT GRATING LOBE PATTERN HAVING A SINGLE REINFORCED GRATING LOBE; (E) MEANS FOR STEERING SAID REINFORCED LOBE OVER AN ANGULAR SECTOR WHICH IS SUBSTANTIALLY SMALLER THAN THE TOTAL AREA TO BE SCANNED; AND (F) SAID ALIGNING MEANS INCLUDING SECOND STEERING MEANS CAUSING SAID PRODUCT PATTERN TO BE REINFORCED
References Cited (Backward Citations)
US3072903A
Cited
US2990544A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |