US4426628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Millimeter wave oscillator with enhanced dielectric coupler
Assignee: United States Department of the Army
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Filing: 1981-03-23
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Granted: 1984-01-17
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Expires: 2001-03-23
Abstract
Abstract A low cost arrangement for a millimeter wave solid state diode oscillator,hich obviates precise machining and uses a dielectric transmission line associated with a resonant cavity. Coupling and impedance matching are greatly facilitated by a conductive stripe structure on the end of the dielectric transmission line, extending into the resonant cavity of the solid state oscillator. Fine tuning is provided by a mechanical slide screw. Two layers of shielding surrounding the resonant cavity are provided by a convenient package suitable for various applications of the millimeter wave oscillator wherein leakage radiation is not permitted.
Inventors
- 👤 Edmund E. Malecki
- 👤 Harold Jacobs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:59
CPC Classifications
H; H03; H03B; H03B9/00; H03B9/12; H03B9/14; H03B9/145; H03B9/146; H03B2201/00; H03B2201/01; H03B2201/014; H03B2201/015
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
128 words
An oscillator comprising an active device capable of producing wave energy, a resonant cavity-formed around said device and including a waveguide, a dielectric transmission medium extending from a portion of said resonant cavity for delivering wave energy to said waveguide, and means mounted on a surface of said dielectric transmission medium for enhancing the coupling of radio frequency energy from said cavity into said dielectric transmission medium to facilitate power transfer and impedance matching between said resonant cavity and said dielectric transmission medium to increase the output power delivered in a first direction to said waveguide, said means for enhancing the coupling including a plurality of parallel metallic stripes spaced apart on said dielectric medium and electrically insulated from each other and displaced therealong in said first direction.
Claim 2
Dependent Claim
128 words
An oscillator comprising an active device capable of producing wave energy, a resonant cavity-formed around said device and including a waveguide, a dielectric transmission medium extending from a portion of said resonant cavity for delivering wave energy to said waveguide, and means mounted on a surface of said dielectric transmission medium for enhancing the coupling of radio frequency energy from said cavity into said dielectric transmission medium to facilitate power transfer and impedance matching between said resonant cavity and said dielectric transmission medium to increase the output power delivered in a first direction to said waveguide, said means for enhancing the coupling including a plurality of parallel metallic stripes spaced apart on said dielectric medium and electrically insulated from each other and displaced therealong in said first direction.
Claim 3
Dependent Claim
38 words
An oscillator according to claim 1 wherein said resonant cavity includes a metallic resonant disc displaced from one end of said device and a planar metallic member located at and connected to the opposite end of said device.
Claim 4
Dependent Claim
33 words
An oscillator according to claim 2 including a further metallic disc within said cavity displaced from said resonant disc further away from said planar member and providing a choke for minimizing radiation loss.
Claim 5
Dependent Claim
20 words
An oscillator according to claim 2 wherein said device is a solid state diode mounted in a pellet shaped package.
Claim 6
Dependent Claim
25 words
An oscillator according to claim 4 further comprising a metallic enclosure for housing and shielding said resonant cavity and having a port for said waveguide.
Claim 7
Dependent Claim
32 words
An oscillator according to claim 5 further comprising an inner metallic member within said enclosure surrounding and further shielding said resonant cavity and elongated with its longitudinal axis in said first direction.
Claim 8
Dependent Claim
42 words
An oscillator according to claim 6 further comprising a movable disc in circuit with said planar metallic member and positioned adjacent said device in the region of said resonant cavity, said disc being adjusted to vary the resonant frequency of said oscillator.
Claim 9
Dependent Claim
14 words
An oscillator according to claim 7 wherein said active device is a Gunn diode.
Claim 10
Dependent Claim
14 words
An oscillator according to claim 7 wherein said active device is an impatt diode.
Claim 11
Dependent Claim
127 words
A source of radio frequency energy comprising a resonant cavity, a biased solid state diode in said resonant cavity, said cavity being formed between a ground plane connected to one terminal of the diode and a resonant disc electrically connected to the other terminal of the diode and physically displaced therefrom, means for extracting power from the resonant cavity including an elongated dielectric transmission medium partially occupying the cavity, said means having a plurality of spaced conductive stripes at one end electrically insulated from one another and mounted transverse to the longitudinal dimensions of the elongated medium, said stripes serving as transformers to match the impedance of the diode and resonant cavity to the dielectric medium thereby enhancing power transfer between said diode and said transmission medium.
Claim 12
Dependent Claim
127 words
A source of radio frequency energy comprising a resonant cavity, a biased solid state diode in said resonant cavity, said cavity being formed between a ground plane connected to one terminal of the diode and a resonant disc electrically connected to the other terminal of the diode and physically displaced therefrom, means for extracting power from the resonant cavity including an elongated dielectric transmission medium partially occupying the cavity, said means having a plurality of spaced conductive stripes at one end electrically insulated from one another and mounted transverse to the longitudinal dimensions of the elongated medium, said stripes serving as transformers to match the impedance of the diode and resonant cavity to the dielectric medium thereby enhancing power transfer between said diode and said transmission medium.
Claim 13
Dependent Claim
50 words
A source according to claim 10 further comprising a metal housing surrounding and shielding the resonant cavity, said metal housing having a port for the passage of radio frequency energy, and the other end of said dielectric transmission medium having a tapered portion located in the vicinity of said port.
Claim 14
Dependent Claim
28 words
A source according to claim 11 wherein said dielectric transmission medium has an opening to accommodate said diode and extends through a major portion of said resonant cavity.
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) | 1987-01-16 | 1987-07-18 | 1988-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-16 | 1991-07-18 | 1992-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-16 | 1995-07-18 | 1996-01-17 | $7700.00 | Window Closed / Lapsed |