Wave transmission lines and networks – Coupling networks – Nonreciprocal gyromagnetic type
Patent
1988-12-05
1989-11-14
Gensler, Paul
Wave transmission lines and networks
Coupling networks
Nonreciprocal gyromagnetic type
333246, H01P 1195
Patent
active
048810525
ABSTRACT:
A microstrip nonreciprocal latching phase shifter has a ferrite rod with ramp-shaped dielectric waveguide members at the ends thereof mounted on one surface of a microstrip dielectric substrate having a ground plane on the opposite surface thereof. The dielectric constants of the ramp members and the rod are substantially the same and the substrate dielectric constant is substantially less than the dielectric constant of the ramp members. A dielectric plate is on top of the rod. A microstrip conductor mounted on the substrate, the ramp members and the plate in axial alignment with the rod extends between the ends of the substrate. The rod has a rectangular longitudinally-extending passageway therein filled by a dielectric core insert having a dielectric constant greater than the dielectric constant of the rod. A single control wire is disposed in and aligned with the core insert. By selectively pulsing the control wire with reversible polarity current pulses, circular magnetic fields of reversible directions are created in the toroidal-shaped flux path formed in the rod around the wire, so that the rod acts as a twin slab type of phase shifter with respect to millimeter wave energy passing from one end of the microstrip conductor to the other end thereof.
REFERENCES:
patent: 3686590 (1972-08-01), Dischert
patent: 4458218 (1984-07-01), Babbitt et al.
patent: 4816787 (1989-03-01), Stern et al.
"Microwave Ferrites and Ferrimagnetics", by Benjamin Lax, Ph.D. and Kenneth . Button, Lincoln Laboratory, Massachusetts Institute of Technology, McGraw-Hill, 1962.
"Digital Phase Shifters", Tech Briefs, No. 652, Trans-Tech, Inc., 4/65.
Babbitt Richard W.
Stern Richard A.
Gensler Paul
Maikis Robert A.
The United States of America as represented by the Secretary of
Zelenka Michael J.
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