US3560978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronically controlled antenna system
Assignee: TDK Micronas GmbH
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Filing: 1968-11-01
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Granted: 1971-02-02
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Expires: 1988-11-01
Abstract
Abstract IN A TACAN BEACON ANTENNA, A MONOPOLE RADIATOR SURROUNDED BY TWO OR MORE CONCENTIC CIRCULAR ARRAYS OF PARASITIC ELEMENTS, WHICH ELEMENTS ARE DIGITALLY INHIBITED IN SEQUENCE IN A PREDETERMINED MANNER, IS USED TO PRODUCE A ROTATING RADIATION PATTERN CAPABLE OF PRODUCING 15 AND 135 CYCLE-PER-SECOND SIGNALS AT A RECEIVER. PARASITIC ELEMENTS ARE INHIBITED BY BEING OPEN CIRCUITED BY DIGITALLY CONTROLLED SWITCHING DIODES. RECIRCULATING SHIFT REGISTERS ARE USED TO INHIBIT PARASITIC ELEMENTS IN THE CIRCULAR ARRAYS TO PRODUCE THE REQUIRED MODULATION RADIATION PATTERN. A COMMON CLOCK IS USED TO STEP SAID REGISTER ALONG TO PRODUCE THE DESIRED ROTATING PATTERN.
Inventors
- 👤 Leon Himmel
- 👤 Sven H Dodington
- 👤 Ernest G Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:14
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/28; G; G01; G01S; G01S1/00; G01S1/02; H01Q3/00; H01Q3/44; H01Q3/446
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 |