Wave transmission lines and networks – Coupling networks – Delay lines including long line elements
Patent
1988-02-03
1989-03-28
Gensler, Paul
Wave transmission lines and networks
Coupling networks
Delay lines including long line elements
333 241, H01P 1215
Patent
active
048167878
ABSTRACT:
A microstrip reciprocal phase shifter is provided comprising a rectangular ferrite rod having an upwardly sloping ramp member at one end thereof and a downwardly sloping ramp member at the other end thereof. The ramp members are made of dielectric waveguide having a dielectric constant substantially the same as the dielectric constant of the rod. The rod and ramp members are disposed on one surface of a microstrip dielectric substrate having a dielectric constant substantially lower than the dielectric constant of the ramp members and a ground plane on the other surface thereof. Input and output sections of microstrip conductor are placed on the surface of the substrate in axial alignment with the rod and ramp members. A dielectric plate having a dielectric constant substantially less than the rod is placed on top of the rod and another section of microstrip conductor is placed on top of the dielectric plate and the two ramp members and is electrically interconnected with the input and output microstrip conductors. A helical coil is arranged to surround the rod and plate to produce a unidirectional magnetic field along the longitudinal axis of the rod to thereby cause the rod to act as a Reggia-Spencer type of ferrite phase shifter.
REFERENCES:
patent: 4458218 (1984-07-01), Babbitt et al.
Amm-Wave Homogeneous Ferrite Phase Scan Antenna, Stern et al, Microwave Jnal, Apr. 1987, pp. 101, 102, 104, 106 & 108.
Babbitt Richard W.
Stern Richard A.
Gensler Paul
Kanars Sheldon
Maikis Robert A.
The United States of America as represented by the Secretary of
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