Patent US2525701A successfully refreshed from Google Patents.
Patent US3092782A successfully refreshed from Google Patents.
US3092782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid state traveling wave parametric amplifier
Assignee: RCA Corp
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Filing: 1959-11-02
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Granted: 1963-06-04
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Expires: 1979-11-02
Abstract
No abstract record available.
Inventors
- 👤 Kern K N Chang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:06
CPC Classifications
H; H03; H03F; H03F7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
202 words
A TRAVELLING WAVE PARAMETRIC AMPLIFIER COMPRISING, IN COMBINATION, AN ACTIVE TRANSMISSION LINE INCLUDING A BASEPLATE OF CONDUCTING MATERIAL, A NON-LINEAR SHUNT CAPACITIVE REACTANCE ELEMENT IN THE FORM OF A CONTINUOUS P-N JUNCTION SEMICONDUCTOR DIODE MOUNTED ALONG ONE SURFACE OF SAID BASEPLATE WITH THE PORTION OF SAID DIODE OF ONE TYPE OF CONDUCTIVITY BEING IN CONTINUOUS ELECTRICAL CONTACT WITH SAID BASEPLATE, A NON-LINEAR SERIES INDUCTIVE REACTANCE ELEMENT IN THE FORM OF A STRIP OF MATERIAL MOUNTED SO AS TO BE IN CONTINUOUS ELECTRICAL CONTACT WITH THE PORTION OF SAID DIODE OF THE OTHER TYPE OF CONDUCTIVITY, MEANS TO APPLY A UNIFORM MAGNETIC FIELD TO SAID STRIP, THE OPEN AREA OF SAID ONE SURFACE OF SAID BASEPLATE BEING COVERED WITH A LAYER OF INSULATING MATERIAL, WHEREBY SAID LAST-MENTIONED PORTION OF SAID DIODE AND SAID STRIP ARE INSULATED FROM SAID BASEPLATE BY SAID LAYER, MEANS TO APPLY ENERGY OF SIGNAL FREQUENCY AND ENERGY OF PUMP FREQUENCY HIGHER THAN SAID SIGNAL FREQUENCY BETWEEN SAID STRIP AND BASEPLATE AT ONE END OF SAID LINE WITH THE NEGATIVE RESISTANCE AND NEGATIVE CONDUCTANCE PRODUCED BY THE NON-LINEAR INTERACTION BETWEEN SAID PUMP AND SIGNAL FREQUENCIES IN SAID INDUCTIVE REACTANCE ELEMENT AND SAID CAPACITIVE REACTANCE ELEMENT, RESPECTIVELY, BEING SO RELATED THAT
Claim 2
Dependent Claim
202 words
A TRAVELLING WAVE PARAMETRIC AMPLIFIER COMPRISING, IN COMBINATION, AN ACTIVE TRANSMISSION LINE INCLUDING A BASEPLATE OF CONDUCTING MATERIAL, A NON-LINEAR SHUNT CAPACITIVE REACTANCE ELEMENT IN THE FORM OF A CONTINUOUS P-N JUNCTION SEMICONDUCTOR DIODE MOUNTED ALONG ONE SURFACE OF SAID BASEPLATE WITH THE PORTION OF SAID DIODE OF ONE TYPE OF CONDUCTIVITY BEING IN CONTINUOUS ELECTRICAL CONTACT WITH SAID BASEPLATE, A NON-LINEAR SERIES INDUCTIVE REACTANCE ELEMENT IN THE FORM OF A STRIP OF MATERIAL MOUNTED SO AS TO BE IN CONTINUOUS ELECTRICAL CONTACT WITH THE PORTION OF SAID DIODE OF THE OTHER TYPE OF CONDUCTIVITY, MEANS TO APPLY A UNIFORM MAGNETIC FIELD TO SAID STRIP, THE OPEN AREA OF SAID ONE SURFACE OF SAID BASEPLATE BEING COVERED WITH A LAYER OF INSULATING MATERIAL, WHEREBY SAID LAST-MENTIONED PORTION OF SAID DIODE AND SAID STRIP ARE INSULATED FROM SAID BASEPLATE BY SAID LAYER, MEANS TO APPLY ENERGY OF SIGNAL FREQUENCY AND ENERGY OF PUMP FREQUENCY HIGHER THAN SAID SIGNAL FREQUENCY BETWEEN SAID STRIP AND BASEPLATE AT ONE END OF SAID LINE WITH THE NEGATIVE RESISTANCE AND NEGATIVE CONDUCTANCE PRODUCED BY THE NON-LINEAR INTERACTION BETWEEN SAID PUMP AND SIGNAL FREQUENCIES IN SAID INDUCTIVE REACTANCE ELEMENT AND SAID CAPACITIVE REACTANCE ELEMENT, RESPECTIVELY, BEING SO RELATED THAT
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) | 1966-06-03 | 1966-12-03 | 1967-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-03 | 1970-12-03 | 1971-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-03 | 1974-12-03 | 1975-06-04 | $7700.00 | Window Closed / Lapsed |