US3287568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parametric up-converter with d. c.-isolated iris as varactor-holder
Assignee: Nortel Networks Ltd
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Filing: 1965-02-24
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Granted: 1966-11-22
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Expires: 1985-02-24
Abstract
No abstract record available.
Inventors
- 👤 Osterwalder Johann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:11
CPC Classifications
H; H03; H03F; H03F7/00; H03F7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A NON-LINEAR IMPEDANCE DEVICE COMPRISING A WAVEGUIDE HAVING A CAPACITIVE IRIS LOCATED THEREIN; MEANS FOR COUPLING A FIRST SIGNAL TO ONE END OF THE WAVEGUIDE; MEANS FOR COUPLING A SECOND SIGNAL FROM THE OTHER END OF THE WAVEGUIDE; A SEMICONDUCTOR DIODE LOCATED IN THE SAME PLANE AS THE IRIS AND HAVING ONE ELECTRODE CONNECTED TO SAID IRIS; A TUNING ELEMENT CONNECTED TO THE OTHER ELECTRODE OF THE DIODE FOR SERIES TUNING THE DIODE; AN INPUT SIGNAL CIRCUIT CONNECTED TO THE IRIS FOR COUPLING A THIRD SIGNAL THERETO; THE THIRD SIGNAL FREQUENCY BEING EQUAL TO THE DIFFERENCE BETWEEN THE FIRST AND SECOND SIGNAL FREQUENCIES, AND ALSO BEING BELOW THE CUT-OFF FREQUENCY OF THE WAVEGUIDE; AND MEANS FOR ELECTRICALLY ISOLATING THE IRIS FROM THE WAVEGUIDE AT THE THIRD SIGNAL FREQUENCY.
Claim 2
Dependent Claim
128 words
A NON-LINEAR IMPEDANCE DEVICE COMPRISING A WAVEGUIDE HAVING A CAPACITIVE IRIS LOCATED THEREIN; MEANS FOR COUPLING A FIRST SIGNAL TO ONE END OF THE WAVEGUIDE; MEANS FOR COUPLING A SECOND SIGNAL FROM THE OTHER END OF THE WAVEGUIDE; A SEMICONDUCTOR DIODE LOCATED IN THE SAME PLANE AS THE IRIS AND HAVING ONE ELECTRODE CONNECTED TO SAID IRIS; A TUNING ELEMENT CONNECTED TO THE OTHER ELECTRODE OF THE DIODE FOR SERIES TUNING THE DIODE; AN INPUT SIGNAL CIRCUIT CONNECTED TO THE IRIS FOR COUPLING A THIRD SIGNAL THERETO; THE THIRD SIGNAL FREQUENCY BEING EQUAL TO THE DIFFERENCE BETWEEN THE FIRST AND SECOND SIGNAL FREQUENCIES, AND ALSO BEING BELOW THE CUT-OFF FREQUENCY OF THE WAVEGUIDE; AND MEANS FOR ELECTRICALLY ISOLATING THE IRIS FROM THE WAVEGUIDE AT THE THIRD SIGNAL FREQUENCY.
References Cited (Backward Citations)
US3212018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |