Back to results
US 5,828,271 AGranted
Planar ferrite toroid microwave phase shifter
AssigneeNorthrop Grumman Corporation
InventorSteven N. Stitzer
Life of this patent
Estimating the term…
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.
Claims20
A planar ferrite toroid phase shifter, comprising:
- an elongated ground plane having a predetermined length;
- a plurality of elongated planar layers of dielectric material having a first dielectric constant formed in upper and lower sections of planar layers on said ground plane, said lower section of planar layers being coextensive with said ground plane;
- a plurality of planar layers of ferrite material formed in an elongated toroid on said layers of first dielectric constant and being coextensive with said upper section of elongated planar layers of dielectric material, said toroid having a centralized internal space extending the length thereof;
- a plurality of elongated planar layers of dielectric material having a second dielectric constant formed in and coextensive with said centralized internal space of the toroid;
- and, an electrical conductor element located in and coextensive with said toroid in said centralized internal space of said toroid for magnetizing the layers of ferrite material forming said toroid so as to provide a latched operating state of the phase shifter.
2 more elements
Dependencies are inferred from the claim text.