US4193047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency selective ferrimagnetic power limiter
Assignee: United States Department of the Air Force
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Filing: 1978-05-02
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Granted: 1980-03-11
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Expires: 1998-05-02
Abstract
Abstract Two sectoral radial resonators coupled at their centers of radii by a strip transmission line and doubly loaded with opposing ferrimagnetic spheres between the said strip transmission line and the ground planes provides a frequency selective power limiter.
Inventors
- 👤 Philip S. Carter
- 👤 Steven N. Stitzer
- 👤 Harry Goldie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:16
CPC Classifications
H; H03; H03G; H03G11/00; H03G11/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A frequency selective ferrimagnetic power limiter comprising: a. a sectorial, radial, radio frequency transmission line resonator having an inner radius and an outer radius cooperating with a ground plane, with the included angle of the said resonant sector being from approximately 90 degrees to approximately 100 degrees; b. a shorting post supporting the said resonant sector and grounding the said resonant sector substantially at its inner radius to the said ground plane; c. a sphere of ferrimagnetic material positioned between the said radial resonator and the said ground plane adjacent the said inner radius; d. means for coupling a signal into the said radial resonator; e. means for coupling a signal out of the said radial resonator; and f. means for providing a magnetic bias field substantially perpendicular the said radial resonator.
Claim 2
Dependent Claim
132 words
A frequency selective ferrimagnetic power limiter comprising: a. a sectorial, radial, radio frequency transmission line resonator having an inner radius and an outer radius cooperating with a ground plane, with the included angle of the said resonant sector being from approximately 90 degrees to approximately 100 degrees; b. a shorting post supporting the said resonant sector and grounding the said resonant sector substantially at its inner radius to the said ground plane; c. a sphere of ferrimagnetic material positioned between the said radial resonator and the said ground plane adjacent the said inner radius; d. means for coupling a signal into the said radial resonator; e. means for coupling a signal out of the said radial resonator; and f. means for providing a magnetic bias field substantially perpendicular the said radial resonator.
References Cited (Backward Citations)
US3113278A
Cited
US4146896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-03-11 | 1983-09-10 | 1984-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-11 | 1987-09-10 | 1988-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-11 | 1991-09-10 | 1992-03-11 | $7700.00 | Window Closed / Lapsed |