US3588901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Miniaturized ferrite phase shifters for electronically steered antenna arrays
Assignee: Westinghouse Electric Corp
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Filing: 1969-07-17
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Granted: 1971-06-28
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Expires: 1989-07-17
Abstract
Abstract DESCRIBED ARE MINIATURIZED ANALOG X-BAND MICROSTRIP FERRITE PHASE SHIFTERS PARTICULARLY ADAPTED FOR USE IN AIRBORNE ANTENNA ARRAYS. ALSO DESCRIBED IS A NOVEL ANTENNA ARRAY ASSEMBLY ITSELF. THE ELEMENTS CONTAINING THE PHASE SHIFTERS ARE DESIGNED INTO HALF-WAVELENGTH SPACING TO ACHIEVE A TWO-AXIS SCAN AND COMPRISE MICROSTRIP TRANSMISSION LINES DEPOSITED ON THIN FERRITE FILMS SURROUNDED BY SUITABLE ACTUATING COILS.
Inventors
- 👤 Daniel C Buck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:03
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/06; H01Q9/065; H01P; H01P1/00; H01P1/18; H01P1/19; H01Q3/00; H01Q3/26; H01Q3/30; H01Q3/34; H01Q3/36; H01Q3/44; H01Q3/46; H01Q9/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |