US3973225A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feather-edge phase shifter
Assignee: United States Department of the Army
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Filing: 1975-08-29
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Granted: 1976-08-03
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Expires: 1995-08-29
Abstract
Abstract A feather-edge conductive pattern is sandwiched between two ferrite bars sos to cause different degrees of residual magnetism in the bars. Two other blocks of materials having relative high dielectric constants sandwich the ends of the bars, and the whole device is inclosed in a waveguide which will have variable phase shifts in accordance to the residual magnetism of the bars.
Inventors
- 👤 Marion E. Hines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:54
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/18; H01P1/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A phase shifter comprising a hollow conducting waveguide; wire means; two pieces of ferrite magnetic material sandwiching said wire means and being inserted in said waveguide; source means connected to said wire means so as to provide magnetization of said magnetic materials; means to launch a high frequency wave through said waveguide for phase shifting of said wave; said wire means is a feather-edge conductive surface pattern; said two magnetic materials are bar means; said wire means is a printed circuit deposited on one of the bars; first and second blocks of high dielectric constant materials inserted at opposite ends of said bar means; and said means to launch the high frequency wave through the waveguide also transmittes the wave through one of said blocks of materials, then through said bar means, and then through the other block of high dielectric constant material.
Claim 2
Dependent Claim
143 words
A phase shifter comprising a hollow conducting waveguide; wire means; two pieces of ferrite magnetic material sandwiching said wire means and being inserted in said waveguide; source means connected to said wire means so as to provide magnetization of said magnetic materials; means to launch a high frequency wave through said waveguide for phase shifting of said wave; said wire means is a feather-edge conductive surface pattern; said two magnetic materials are bar means; said wire means is a printed circuit deposited on one of the bars; first and second blocks of high dielectric constant materials inserted at opposite ends of said bar means; and said means to launch the high frequency wave through the waveguide also transmittes the wave through one of said blocks of materials, then through said bar means, and then through the other block of high dielectric constant material.
References Cited (Backward Citations)
US3521198A
Cited
US3316506A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-03 | 1980-02-02 | 1980-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-03 | 1984-02-02 | 1984-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-03 | 1988-02-02 | 1988-08-03 | $7700.00 | Window Closed / Lapsed |