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US3681715A
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Reciprocal latching ferrite phase shifter
Assignee: United States Department of the Army
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Filing: 1970-06-23
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Granted: 1972-08-01
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Expires: 1990-06-23
Abstract
Abstract A microwave phase shifter includes a pair of spaced ferrite toroids centrally positioned within a rectangular waveguide adopted to propagate TE10 microwave energy. Each of the ferrites has a square hysteresis loop characteristic and each is independently energized.
Inventors
- 👤 Elmer Freibergs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:53
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/18; H01P1/19
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
127 words
A reciprocal microwave phase shifter comprising: a rectangular waveguide section for propagating microwave energy in the TE10 mode, a pair of rectangular ferrite toroids that are made of the same ferrite material and that are identical in construction, said toroids being spaced and magnetically isolated by a dielectric separator each toroid having a portion positioned longitudinally within said waveguide section in close proximity to the longitudinal axis of said waveguide section said portions of the respective toroids being on opposite sides of the axis and being centrally between the wide walls of said waveguide section, each toroiD having a winding coiled about a side arm that is entirely outside said waveguide, and respective current pulsing means coupled to each of said windings for independently energizing said toroids.
Claim 2
Dependent Claim
127 words
A reciprocal microwave phase shifter comprising: a rectangular waveguide section for propagating microwave energy in the TE10 mode, a pair of rectangular ferrite toroids that are made of the same ferrite material and that are identical in construction, said toroids being spaced and magnetically isolated by a dielectric separator each toroid having a portion positioned longitudinally within said waveguide section in close proximity to the longitudinal axis of said waveguide section said portions of the respective toroids being on opposite sides of the axis and being centrally between the wide walls of said waveguide section, each toroiD having a winding coiled about a side arm that is entirely outside said waveguide, and respective current pulsing means coupled to each of said windings for independently energizing said toroids.
Claim 3
Dependent Claim
19 words
The microwave phase shifter in accordance with claim 1 wherein said ferrite toroids have a square loop hysteresis characteristic.
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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |