Patent US3715692A successfully refreshed from Google Patents.
US3715692A
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Microstrip-slot line phase shifter
Assignee: United States Department of the Army
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Filing: 1972-01-10
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Granted: 1973-02-06
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Expires: 1992-01-10
Abstract
Abstract A microwave-integrated-circuit phase shifter comprising a dielectric substrate such as ferrite, one side being metallized to form a slot line and the other being metallized to form a parallelling microstrip transmission line, the two lines being coupled together through the dielectric substrate. A region of circular polarization of the input signal is set up between the lines and a magnetic field which is adjustable in amplitude is applied in the direction of the two lines. Variation of the amplitude of the magnetic field varies the amount of phase shift between the input and output of the device.
Inventors
- 👤 M Reuss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:14
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/18; H01P1/19
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
202 words
A microstrip/slot line phase shifter comprising, in combination: a substrate formed from dielectric material having tensor permeability; microstrip transmission line means comprising a thin metallic film deposited on one side of said substrate; slot transmission line means comprising a thin metallIc film deposited on the side of said substrate opposite said microstrip line, said slot line film having a slot therein containing no metal; said slot line running parallel to said microstrip line over at least a portion of its length to form a coupled region through said substrate, input signal coupling means for coupling an r.f. signal to said transmission lines including means to split said r.f. signal into two parts which are 90* out of phase with each other and means to couple one part of the split signal to said slot line and the other part to said microstrip line; output signal coupling means including means for combining two out-of-phase r.f. signals into a single r.f. signal and means for coupling the outputs of said slot and microstrip lines into said combining means; and means for producing a magnetic field through the coupled region of said substrate codirectional with the direction of said transmission lines in said coupled region.
Claim 2
Dependent Claim
202 words
A microstrip/slot line phase shifter comprising, in combination: a substrate formed from dielectric material having tensor permeability; microstrip transmission line means comprising a thin metallic film deposited on one side of said substrate; slot transmission line means comprising a thin metallIc film deposited on the side of said substrate opposite said microstrip line, said slot line film having a slot therein containing no metal; said slot line running parallel to said microstrip line over at least a portion of its length to form a coupled region through said substrate, input signal coupling means for coupling an r.f. signal to said transmission lines including means to split said r.f. signal into two parts which are 90* out of phase with each other and means to couple one part of the split signal to said slot line and the other part to said microstrip line; output signal coupling means including means for combining two out-of-phase r.f. signals into a single r.f. signal and means for coupling the outputs of said slot and microstrip lines into said combining means; and means for producing a magnetic field through the coupled region of said substrate codirectional with the direction of said transmission lines in said coupled region.
Claim 3
Dependent Claim
202 words
A microstrip/slot line phase shifter comprising, in combination: a substrate formed from dielectric material having tensor permeability; microstrip transmission line means comprising a thin metallic film deposited on one side of said substrate; slot transmission line means comprising a thin metallIc film deposited on the side of said substrate opposite said microstrip line, said slot line film having a slot therein containing no metal; said slot line running parallel to said microstrip line over at least a portion of its length to form a coupled region through said substrate, input signal coupling means for coupling an r.f. signal to said transmission lines including means to split said r.f. signal into two parts which are 90* out of phase with each other and means to couple one part of the split signal to said slot line and the other part to said microstrip line; output signal coupling means including means for combining two out-of-phase r.f. signals into a single r.f. signal and means for coupling the outputs of said slot and microstrip lines into said combining means; and means for producing a magnetic field through the coupled region of said substrate codirectional with the direction of said transmission lines in said coupled region.
Claim 4
Dependent Claim
202 words
A microstrip/slot line phase shifter comprising, in combination: a substrate formed from dielectric material having tensor permeability; microstrip transmission line means comprising a thin metallic film deposited on one side of said substrate; slot transmission line means comprising a thin metallIc film deposited on the side of said substrate opposite said microstrip line, said slot line film having a slot therein containing no metal; said slot line running parallel to said microstrip line over at least a portion of its length to form a coupled region through said substrate, input signal coupling means for coupling an r.f. signal to said transmission lines including means to split said r.f. signal into two parts which are 90* out of phase with each other and means to couple one part of the split signal to said slot line and the other part to said microstrip line; output signal coupling means including means for combining two out-of-phase r.f. signals into a single r.f. signal and means for coupling the outputs of said slot and microstrip lines into said combining means; and means for producing a magnetic field through the coupled region of said substrate codirectional with the direction of said transmission lines in said coupled region.
Claim 5
Dependent Claim
14 words
A phase shifter as in claim 1, wherein said substrate is formed from ferrite.
Claim 6
Dependent Claim
14 words
A phase shifter as in claim 1, wherein said substrate is formed from garnet.
Claim 7
Dependent Claim
20 words
A phase shifter as in claim 1, wherein said input r.f. signal is split into two parts of equal amplitude.
Claim 8
Dependent Claim
16 words
A phase shifter as in claim 1, wherein said magnetic field is a d.c. magnetic field.
Claim 9
Dependent Claim
15 words
A phase shifter as in claim 1, wherein said magnetic field is adjustable in strength.
Claim 10
Dependent Claim
85 words
A phase shifter as in claim 1, wherein said slot line and said microstrip line are in inwardly spiraling form along the length of the coupled region, one of said lines being short-circuited at its inner end and the other being open-circuited at its inner end; said substrate being formed with a hole through it located at the center of the spiral, and said means for producing a magnetic field comprises means for producing a circular magnetic field substantially codirectional with said transmission line spirals.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |