Planar ferrite toroid microwave phase shifter

Details Planar ferrite toroid microwave phase shifter Planar ferrite toroid microwave phase shifter

1997-03-06

1998-10-27

Pascal, Robert J.

Wave transmission lines and networks

Coupling networks

Nonreciprocal gyromagnetic type

333158, H01P 132

Patent

active

058282718

ABSTRACT:
A planar phase shifter having plural layers of ferrite forming a closed magnetic toroidal path and including internal layers of dielectric material of a relatively high dielectric constant and underlying layers of dielectric material having a relatively low dielectric constant. A stripline to slot line transition is also formed at least at one end of the device. All of the elements are formed over a ground plane and have either metallized external sidewalls or a set of metallized vias running through the outer wall portions over its length.

REFERENCES:
patent: 3707688 (1972-12-01), Robinson et al.
patent: 3761845 (1973-09-01), Ajioka et al.
patent: 5157364 (1992-10-01), Pond et al.
patent: 5170138 (1992-12-01), Roberts et al.
patent: 5438167 (1995-08-01), McClanahan et al.
Charlton, "A Low-Cost Cosntruction . . . Phase shifters", IEEE trans. on microwave & Tech. vol., MTT-22, No. 6, pp. 614-617, Jun. 1974.
"Dual-Ferrite Slot Line for Broadband, High-Nonreciprocity Phase Shifters", IEEE Transactions On Microwave Theory And Techniques, vol. 39, No. 12, Dec., 1991, pp. 2204-2210.

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