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US4342010A
Expired / Lapsed
US
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Dielectric waveguide power limiter
Assignee: United States Department of the Army
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Filing: 1980-05-27
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Granted: 1982-07-27
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Expires: 2000-05-27
Abstract
Abstract A dielectric waveguide power limiter for a self-oscillating mixer operatingn millimeter-wave frequencies. The limiter includes a high resistivity silicon dielectric waveguide and a Gunn oscillator. A plurality of dielectric resonators each including a high uniaxial anisotropy ferrite sphere embedded therein are positioned between the power input end of the waveguide and the Gunn oscillator.
Inventors
- 👤 Samuel Dixon, Jr.
- 👤 Harold Jacobs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:18
CPC Classifications
H; H03; H03G; H03G11/00; H03G11/006
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
70 words
A microwave device, which comprises: a high resistivity dielectric waveguide including means for coupling millimeter or sub-millimeter wave microwave energy from an external source into the waveguide; a self-oscillating device positioned in said dielectric waveguide; and a plurality of high dielectric-constant resonators, comprising ferrite and biased to a subsidiary resonance state, interposed between said energy coupling means and said self-oscillating device for limiting the power fed to said self-oscillating device.
Claim 2
Dependent Claim
70 words
A microwave device, which comprises: a high resistivity dielectric waveguide including means for coupling millimeter or sub-millimeter wave microwave energy from an external source into the waveguide; a self-oscillating device positioned in said dielectric waveguide; and a plurality of high dielectric-constant resonators, comprising ferrite and biased to a subsidiary resonance state, interposed between said energy coupling means and said self-oscillating device for limiting the power fed to said self-oscillating device.
Claim 3
Dependent Claim
33 words
The device according to claim 1 wherein each resonator includes a ferrite member of high uniaxial anisotropy with the easy access of magnetism aligned perpendicular to the direction of propagation in the waveguide.
Claim 4
Dependent Claim
27 words
The device according to claim 1 further comprising: means for establishing a DC magnetic field in said waveguide perpendicular to the direction of propagation in the waveguide.
Claim 5
Dependent Claim
13 words
The device according to claim 1 wherein said resonator is comprised of rutile.
Claim 6
Dependent Claim
14 words
The device according to claim 1 wherein said resonator is comprised of strontium titanate.
Claim 7
Dependent Claim
15 words
The device according to claim 1 wherein said waveguide is comprised of high resistivity silicon.
Claim 8
Dependent Claim
35 words
The device according to claim 1 wherein said waveguide is configured as an elongated rectangular member of high resistivity dielectric material and said energy coupling means comprises a tapered extremity in said elongated rectangular member.
Claim 9
Dependent Claim
24 words
The device according to claim 1 wherein said resonators comprise a cylindrical recess in said waveguide filled with a material of high dielectric constant.
Claim 10
Dependent Claim
14 words
The device according to claim 2 wherein said ferrite member comprises a ferrite bead.
Claim 11
Dependent Claim
13 words
The device according to claim 2 wherein said ferrite member comprises barium ferrite.
Claim 12
Dependent Claim
27 words
The device according to claim 3 wherein said magnetic field establishing means comprises first and second rare-earth permanent magnets respectively positioned on opposite sides of said waveguide.
Claim 13
Dependent Claim
37 words
The device according to claim 2 wherein the magnetic properties of said ferrite members are selected such that said device functions to limit the power of one or more specified frequencies over a wide band of frequencies.
Claim 14
Dependent Claim
67 words
A microwave device which comprises: a high resistivity dielectric waveguide including means for coupling millimeter or sub-millimeter wave microwave energy from an external source into the waveguide; a self-oscillating device positioned in said dielectric waveguide; and at least one slab of ferrite material, said ferrite material being biased to a subsidiary resonance state, positioned in said dielectric waveguide intermediate said energy coupling means and said self-oscillating device.
Claim 15
Dependent Claim
67 words
A microwave device which comprises: a high resistivity dielectric waveguide including means for coupling millimeter or sub-millimeter wave microwave energy from an external source into the waveguide; a self-oscillating device positioned in said dielectric waveguide; and at least one slab of ferrite material, said ferrite material being biased to a subsidiary resonance state, positioned in said dielectric waveguide intermediate said energy coupling means and said self-oscillating device.
Claim 16
Dependent Claim
13 words
The device according to claim 13 wherein said ferrite material comprises barium ferrite.
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) | 1985-07-26 | 1986-01-25 | 1986-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-26 | 1990-01-25 | 1990-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-26 | 1994-01-25 | 1994-07-27 | $7700.00 | Window Closed / Lapsed |