Claims
- 1. A radio frequency phase shifter comprising:
- a latching RF phase shifter having just one ferrimagnetic toroid with a conductive latch wire and a dielectric slab disposed along a longitudinal axis between opposite ends of a conductive waveguide, said toroid and said slab being asymmetrically mounted with said waveguide;
- said phase shifter being disposed serially with a microstrip RF transmission line via an impedance-matched transition located adjacent at least at one of the ends of said waveguide, said transition being effected without extending into a toroid wall.
- 2. A radio frequency phase shifter as in claim 1, wherein:
- said conductive waveguide being formed by metallization of the outermost surfaces of the composite toroid/slab structure; and
- said conductive latch wire being threaded through the open center of the toroid for use in setting remnant magnetic flux within said toroid to predetermined values.
- 3. A radio frequency phase shifter as in claim 1, wherein each of said impedance-matched transitions comprise:
- a conductive link capacitively coupled between said microstrip line and said waveguide at a point proximate the junction between said dielectric slab and toroid.
- 4. A radio frequency phase shifter as in claim 3, wherein:
- said conductive link includes a ribbon member capacitively coupled at one end to said microstrip line and conductively coupled at its other end to said waveguide.
- 5. A radio frequency phase shifter as in claim 3, wherein:
- said waveguide is disposed with its ends between abutting ends of dielectric substrates having first conductive ground plane surfaces and second surfaces with said microstrip transmission line formed thereon;
- said first conductive ground plane surfaces of the substrates being conductively coupled with each other and with one side of said abutting waveguide ends;
- said substrates being of lesser thickness than said waveguide; and
- said conductive link defining a predetermined gap G between it and the exposed respective end of said dielectric slab.
- 6. A radio frequency phase shifter as in claim 5, wherein:
- said conductive link includes a ribbon member capacitively coupled at one end to said microstrip line and conductively coupled at its other end to said waveguide.
- 7. A radio frequency phase shifter as in claim 5, wherein said gap G is of approximately triangular shape.
- 8. A radio frequency phase shifter as in claim 6, including a discrete chip capacitor affixed to each microstrip transmission line at a predetermined distance away from said junction between the slab and toroid.
- 9. A radio frequency phase shifter as in claim 8, wherein each said capacitor has a capacitance of approximately 0.3 pf.
- 10. A radio frequency phase shifter comprising:
- a latching RF phase shifter having just one ferrimagnetic toroid with a conductive latch wire and a dielectric slab disposed along a longitudinal axis between opposite ends of a conductive waveguide, said toroid and said slab having axes offset from the axis of said waveguide;
- said phase shifter being disposed serially with a microstrip RF transmission line via an impedance-matched transition located adjacent at least at one of the ends of said waveguide, said transition being effected without extending into a toroid wall, said transition having a conductive probe extending perpendicularly from a terminate end of said microstrip transmission line along and in contact with a respective end of said dielectric slab.
- 11. A radio frequency phase shifter as in claim 10, further comprising:
- a conductive end cap conductively connected to each end of said waveguide, said end caps enclosing the probe at each end of the waveguide and defining dimensioned capacitive gaps between the probe and end cap for use in achieving matched impedance transitions between waveguide and microstrip RF modes.
- 12. A radio frequency phase shifter as in claim 11, further comprising:
- an L-shaped dielectric spacer located at each end of the waveguide with its leg extending longitudinally into the waveguide and its bight portion being disposed between a respective probe and end cap.
- 13. A hybrid mode RF phase shifter comprising:
- a latching conductive waveguide phase shifter having just one ferrimagnetic toroid with a conductive latch wire and a dielectric slab, said toroid and said slab extending longitudinally between two ends of said waveguide phase shifter, said toroid and said slab being asymmetrically mounted in said waveguide;
- a first microstrip line;
- a first impedance matched coupling between said first microstrip line and one end of said waveguide phase shifter, said first coupling being effected without extending into a toroid wall;
- a second microstrip line; and
- a second impedance matched coupling between said second microstrip line and the other end of said waveguide phase shifter, said second coupling also being effective without extending into a toroid wall.
- 14. A hybrid mode RF phase shifter comprising:
- a dielectric substrate having a conductive ground plane surface on one side;
- a latching waveguide phase shifter having metallized surfaces affixed to said ground plane surface and having just one ferrimagnetic toroid with a conductive latch wire extending longitudinally and a dielectric slab, said toroid and said slab extending between two ends of said waveguide phase shifter, said toroid and said slab having axes offset from the axis of said waveguide phase shifter;
- apertures extending through said ground plane conductive surface and said substrate beyond and adjacent the ends of said waveguide phase shifter;
- conductive microstrip transmission line disposed on the other side of said substrate respectively terminating at said apertures; and
- a conductive probe extending through each of said apertures beyond and adjacent the ends of said phase shifter and electrically connected, respectively, to the conductive microstrip transmission lines terminating thereat so as to effect matched impedance RF couplings between the microstrip transmission lines and phase shifter, said couplings not extending into the walls of said toroid.
- 15. A hybrid mode RF phase shifter as in claim 14, wherein each probe is mounted in substantial alignment with the junction between the slab and toroid.
- 16. A hybrid mode RF phase shifter as in claim 14, further comprising:
- metal end caps respectively affixed to said conductive ground plane surface and to the metallized surfaces of said waveguide to conductively enclose said conductive probes and assist in establishing matched impedance coupling capacitances between said probes and the waveguide phase shifter.
- 17. A hybrid mode RF phase shifter as in claim 16, further comprising:
- L-shaped dielectric wire guides respectively mounted between said end caps and said probes.
- 18. A hybrid mode RF phase shifter as in claim 16, wherein said probes are disposed perpendicular to said substrate and extend to a predetermined distance from said end caps to establish a gap G determinative, at least in part, of said coupling capacitances.
- 19. A hybrid mode RF phase shifter comprising:
- a substrate of dielectric material;
- a metallized surface on one side of said substrate;
- just one axially-elongated, ferrimagnetic toroid mounted on said metallized surface;
- a slab of dielectric material mounted adjacent a longitudinal side of said toroid;
- a metal covering on the exposed surfaces of said toroid and slab, said metal covering being in electrical contact with said metallized surface, said metal covering having an axis offset from the axes of said toroid and said slab;
- apertures in said metallized surface and in said substrate respectively substantially adjacent opposite ends of the junctions between slab and toroid;
- separate metal microstrip transmission lines formed on one side of said substrate opposite said metallized surface, said lines respectively terminating at said apertures;
- conductive probes respectively mounted in electrical contact with the terminations of said lines and extending through said apertures adjacent the ends of said junction of slab and toroid; and
- an electrical current conductor respectively extending axially through said toroid.
- 20. A hybrid mode RF phase shifter comprising:
- a rectangular waveguide phase shifter having just one ferrimagnetic toroid, a dielectric slab mounted adjacent said toroid, and a metal outer surface on the toroid and slab, the axes of said toroid and said slab being symmetrical to the axis of said metal outer surface;
- a pair of planar dielectric substrates, one surface of each of which is conducting and the other surface having narrow conductive strips, the height of each of said substrates being less than the height of said waveguide phase shifter;
- said substrates being disposed in abutting relationship with opposite ends of said waveguide phase shifter with their conducting surfaces electrically connected to the metal outer surface of said rectangular waveguide phase shifter at one side of the phase shifter;
- capacitance elements respectively mounted on the narrow conductive strips of said substrate at locations spaced from respective ends of the waveguide phase shifter; and
- conductive ribbons respectively suspended between said capacitance elements and the metal outer surface of said waveguide phase shifter that is displaced therefrom.
- 21. A hybrid mode RF phase shifter as in claim 20, wherein:
- said conductive ribbons are in contact with said metal outer surface.
- 22. A hybrid mode RF phase shifter comprising:
- just one ferrimagnetic toroid having a rectangular cross section;
- a slab of dielectric material in electrical contact with said toroid, one side of said slab being adjacent one side of said toroid;
- a conductive surface on the outer sides of said toroid and slab, the axis of said conductive surface being offset from the axes of said toroid and said slab;
- two microstrip transmission lines, each including a planar dielectric substrate, one surface of which is conducting and the other surface having a narrow conductive strip thereon, the thickness of said substrate being less than the thickness of said toroid;
- said microstrip transmission lines being in abutting relationship with opposite ends of said toroid;
- capacitance elements respectively mounted on said narrow conductive strip of said microstrip transmission lines spaced from the ends of said toroid; and
- conductive ribbon suspended between said capacitance elements and a conductive surface.
- 23. A hybrid mode RF phase shifter as in claim 22 wherein the conductive ribbon is conductively attached to the narrow conductive strip of said microstrip and capactively coupled to a conductive surface of waveguide substantially adjacent the junction between the toroid and slab.
- 24. A radio frequency phase shifter comprising:
- an RF phase shifter having a dielectric slab disposed along a longitudinal axis between opposite ends of a conductive waveguide;
- said phase shifter being disposed serially with a microstrip RF transmission line via an impedance-matched transition located at least at one of the ends of said waveguide; and
- said RF phase shifter including
- just one axially elongated ferrimagnetic toroid with said dielectric slab affixed to one side of the toroid, said conductive waveguide being formed by metallization of the outermost surfaces of the composite toroid/slab structure, the axes of said toroid and said slab being offset from the axis of said waveguide; and
- a conductive latch wire being threaded through the open center of the toroid for use in setting remnant magnetic flux within said toroid to predetermined values;
- said impedance-matched transition comprising a conductive link capactively coupled between said microstrip line and said waveguide at a point substantially proximate the junction between the toroid and slab.
- 25. A radio frequency phase shifter as in claim 24, wherein:
- said conductive link includes said ribbon member capacitively coupled at one end to said microstrip line and conductively coupled at its other end to said waveguide.
- 26. A radio frequency phase shifter as in claim 24, wherein
- said waveguide is disposed with its ends between abutting ends of dielectric substrates having first conductive ground plane surfaces and second surfaces with said microstrip transmission line formed thereon;
- said first conductive ground plane surfaces of the substrates being conductively coupled with each other end with one side of said abutting waveguide ends;
- said substrates being of lesser thickness than said waveguide; and
- said conductive link defining a predetermined gap G between it and the exposed respective ends of the slab and toroid.
- 27. A radio frequency phase shifter as in claim 26, wherein:
- said conductive link includes a ribbon member capacitively coupled at one end to said microstrip line and conductively coupled at its other end to said waveguide.
- 28. A radio frequency phase shifter as in claim 26, wherein said gap G is of approximately triangular shape.
- 29. A radio frequency phase shifter as in claim 27, including a discrete chip capacitor affixed to each microstrip transmission line at a predetermined distance away from the slab and toroid.
- 30. A radio frequency phase shifter as in claim 29, wherein each said capacitor has a capacitance of approximately 0.3 pf.
Parent Case Info
This application is a continuation-in-part of Ser. No. 07/330,617 filed Mar. 30, 1989 and issued on Dec. 24, 1991 as U.S. Pat. No. 5,075,648.
US Referenced Citations (24)
Continuation in Parts (1)
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330617 |
Mar 1989 |
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