Patent US3169227A successfully refreshed from Google Patents.
US3169227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diode-cavity parametric amplifier
Assignee: SFD LAB Inc
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Filing: 1961-03-10
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Granted: 1965-02-09
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Expires: 1981-03-10
Abstract
No abstract record available.
Inventors
- 👤 Henry T Closson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:58
CPC Classifications
H; H03; H03F; H03F7/00; H03F7/04; H03F2200/00; H03F2200/372
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
212 words
AN AMPLIFIER COMPRISING: A CAVITY RESONATOR, A VARACTOR HAVING TWO END TERMINALS AND DISPOSED IN SAID CAVITY RESONATOR SUBSTANTIALLY PARALLEL TO THE ELECTRIC FIELD OF THE DOMINANT MODE OF SAID CAVITY RESONATOR, MEANS FOR MOUNTING ONE OF SAID TERMINALS OF SAID VARACTOR FROM SAID CAVITY RESONATOR, THE OTHER OF SAID TERMINALS PROTRUDING THROUGH AN APERTURE IN THE WALL OF SAID CAVITY RESONATOR TO FORM A CENTER CONDUCTOR OF A COAXIAL LINE FOR FEEDING SIGNAL WAVE ENERGY TO BE AMPLIFIED INTO SAID VARACTOR, MEANS FOR COUPLING HIGH FREQUENCY PUMP ENERGY INTO SAID CAVITY RESONATOR AND SAID VARACTOR TO PRODUCE AN IDLER FREQUENCY COMPONENT AND TO AMPLIFRY THE SIGNAL WAVE ENERGY, MEANS FOR FORMING A LOW PASS FILTER IN SAID COAXIAL LINE FOR TRAPPING PUMP AND IDLER POWER IN SAID CAVITY RESONATOR, BOARD PASS BAND FILTER MEANS COUPLED TO SAID CAVITY RESONATOR TO DEFINE A BROADBAND RESONANT IDLER CIRCUIT, MEANS FORMING A BROADBANDING NETWORK COUPLED TO SAID COAXIAL LINE FOR BROADCASTING SAID INPUT COAXIAL LINE CIRCUIT, A D.C. CIRCUIT INTERCONNECTING THE TWO END TERMINALS OF SAID VARIATOR AND INCLUDING A HIGH RESISTIVE ELEMENT IN SERIES WITH SAID D.C. CIRCUIT FOR SELF-BIASING OF SAID VARACTOR FOR D.C. VOLTAGE WHEREBY SAID AMPLIFIER IS RENDERED LESS RESPONSIVE TO RENDOM FLUCTUATIONS IN THE AMPLITUDE OF THE PUMP ENERGY.
Claim 2
Dependent Claim
212 words
AN AMPLIFIER COMPRISING: A CAVITY RESONATOR, A VARACTOR HAVING TWO END TERMINALS AND DISPOSED IN SAID CAVITY RESONATOR SUBSTANTIALLY PARALLEL TO THE ELECTRIC FIELD OF THE DOMINANT MODE OF SAID CAVITY RESONATOR, MEANS FOR MOUNTING ONE OF SAID TERMINALS OF SAID VARACTOR FROM SAID CAVITY RESONATOR, THE OTHER OF SAID TERMINALS PROTRUDING THROUGH AN APERTURE IN THE WALL OF SAID CAVITY RESONATOR TO FORM A CENTER CONDUCTOR OF A COAXIAL LINE FOR FEEDING SIGNAL WAVE ENERGY TO BE AMPLIFIED INTO SAID VARACTOR, MEANS FOR COUPLING HIGH FREQUENCY PUMP ENERGY INTO SAID CAVITY RESONATOR AND SAID VARACTOR TO PRODUCE AN IDLER FREQUENCY COMPONENT AND TO AMPLIFRY THE SIGNAL WAVE ENERGY, MEANS FOR FORMING A LOW PASS FILTER IN SAID COAXIAL LINE FOR TRAPPING PUMP AND IDLER POWER IN SAID CAVITY RESONATOR, BOARD PASS BAND FILTER MEANS COUPLED TO SAID CAVITY RESONATOR TO DEFINE A BROADBAND RESONANT IDLER CIRCUIT, MEANS FORMING A BROADBANDING NETWORK COUPLED TO SAID COAXIAL LINE FOR BROADCASTING SAID INPUT COAXIAL LINE CIRCUIT, A D.C. CIRCUIT INTERCONNECTING THE TWO END TERMINALS OF SAID VARIATOR AND INCLUDING A HIGH RESISTIVE ELEMENT IN SERIES WITH SAID D.C. CIRCUIT FOR SELF-BIASING OF SAID VARACTOR FOR D.C. VOLTAGE WHEREBY SAID AMPLIFIER IS RENDERED LESS RESPONSIVE TO RENDOM FLUCTUATIONS IN THE AMPLITUDE OF THE PUMP ENERGY.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-09 | 1968-08-10 | 1969-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-09 | 1972-08-10 | 1973-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-09 | 1976-08-10 | 1977-02-09 | $7700.00 | Window Closed / Lapsed |