US3560883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency control of a microwave device using a transmission line as a frequency determining element
Assignee: Automatic Electric Laboratories Inc
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Filing: 1968-08-13
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Granted: 1971-02-02
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Expires: 1988-08-13
Abstract
Abstract A TRANSISTORIZED MICROWAVE OSCILLATOR HAVING A DISTRIBUTED CONSTANT TRANSMISSION LINE AS ITS PRIMARY FREQUENCY DETERMINING ELEMENT, IS ELECTRICALLY TUNED BY VARYING THE RESISTANCE OF AT LEAST ONE VARIABLE CONDUCTANCE DEVICE POSITIONED NEAR A VOLTAGE NULL ON THE TRANSMISSION LINE. THE DISCLOSED NULL TUNING HAS PARTICULAR APPLICATION IN OSCILLATORS BECAUSE OF ITS CAPABILITY OF PRODUCING SUBSTANTIALLY LINEAR FREQUENCY MODULATION, BUT MAY BE USED IN OTHER APPLICATIONS, FOR EXAMPLE IN ELECTRICALLY TUNED FILTERS, IN WHICH IT IS DESIRED TO VARY AS A FUNCTION OF SIGNAL VOLTAGE OR CURRENT THE REACTANCE OF A LENGTH OF TRANSMISSION LINE.
Inventors
- 👤 Robert G Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:55
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/18; H03B5/1805; H03C; H03C3/00; H03C3/10; H03C3/12; H03C3/22; H03C7/00; H03C7/02; H03C7/025; H03C7/027
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) | 1974-02-01 | 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 |