Patent US3886471A successfully refreshed from Google Patents.
US3886471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronically tunable gunn oscillator with automatic frequency control
Assignee: Leonardo SpA
•
Filing: 1974-03-07
•
Granted: 1975-05-27
•
Expires: 1994-03-07
Abstract
Abstract A frequency stabilized micro-wave signal source having as active element a semiconductor RF-generator comprising in combination a portion of wave-guide wherein electrically conducting mechanical support means are provided for supporting the semiconductor RF generator and feeding a supply voltage or current thereto. Said portion of wave-guide is coupled by a window with a resonant cavity loaded with ferrite supported by a dielectric further including a coil generating a magnetic field, in which said ferrite is immersed. The voltage or current supply terminal of said semiconductor RF generator is connected to a short time constant automatic frequency control circuit and said coil is connected to a long time constant frequency control circuit. Moreover, there may be provided means for varying the current in said coil to provide a coarse tuning of said ferrite loaded resonant cavity. The semiconductor RF generator used according the present invention is a Gunn diode.
Inventors
- 👤 Massimo Massani
- 👤 Gesaro Giuseppe Di
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:56
CPC Classifications
H; H03; H03L; H03L7/00; H03L7/02; H03B; H03B9/00; H03B9/12; H03B9/14; H03B9/142
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
124 words
A frequency stabilized micro-wave signal source having as active element a semiconductor RF-generator comprising in combination a first portion of waveguide wherein electrically conducting mechanical support means are provided for supporting said semiconductor RF generator and feeding a supply voltage or current thereto; said first portion of waveguide being couplEd by a window with a second portion of waveguide constituting a resonant cavity loaded with ferrite supported by a dielectric, further including a coil for producing a magnetic field in which said ferrite is immersed; the voltage or current supply terminal of said semiconductor RF generator being connected to a power supply controlled by a short time constant automatic frequency control circuit, said coil being connected to a long time constant frequency control circuit.
Claim 2
Dependent Claim
124 words
A frequency stabilized micro-wave signal source having as active element a semiconductor RF-generator comprising in combination a first portion of waveguide wherein electrically conducting mechanical support means are provided for supporting said semiconductor RF generator and feeding a supply voltage or current thereto; said first portion of waveguide being couplEd by a window with a second portion of waveguide constituting a resonant cavity loaded with ferrite supported by a dielectric, further including a coil for producing a magnetic field in which said ferrite is immersed; the voltage or current supply terminal of said semiconductor RF generator being connected to a power supply controlled by a short time constant automatic frequency control circuit, said coil being connected to a long time constant frequency control circuit.
Claim 3
Dependent Claim
144 words
A frequency stabilized micro-wave signal source having as active element a semiconductor RF-generator, comprising in combination a first portion of waveguide wherein electrically conducting mechanical support means are provided for supporting said semiconductor RF generator and feeding a supply voltage or current thereto; said first portion of waveguide being coupled by a window with a second portion of wave-guide constituting a resonant cavity loaded with ferrite supported by a dielectric further including a coil for producing a magnetic field in which said ferrite is immersed; the voltage or current supply terminal of said semiconductor RF generator being connected to a power supply controlled by a short time constant automatic frequency control circuit, said coil being connected to a long time constant frequency control circuit and means for varying the current in said coil to provide a coarse tuning of said ferrite loaded resonant cavity.
Claim 4
Dependent Claim
144 words
A frequency stabilized micro-wave signal source having as active element a semiconductor RF-generator, comprising in combination a first portion of waveguide wherein electrically conducting mechanical support means are provided for supporting said semiconductor RF generator and feeding a supply voltage or current thereto; said first portion of waveguide being coupled by a window with a second portion of wave-guide constituting a resonant cavity loaded with ferrite supported by a dielectric further including a coil for producing a magnetic field in which said ferrite is immersed; the voltage or current supply terminal of said semiconductor RF generator being connected to a power supply controlled by a short time constant automatic frequency control circuit, said coil being connected to a long time constant frequency control circuit and means for varying the current in said coil to provide a coarse tuning of said ferrite loaded resonant cavity.
Claim 5
Dependent Claim
19 words
A frequency stabilized microwave signal source according to claim 1 wherein said semiconductor RF generator is a Gunn diode.
Claim 6
Dependent Claim
19 words
A frequency stabilized microwave signal source according to claim 2 wherein said semiconductor RF generator is a Gunn diode.
References Cited (Backward Citations)
US3702445A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |