Wave transmission lines and networks – Coupling networks – Nonreciprocal gyromagnetic type
Patent
1982-12-03
1986-03-11
Gensler, Paul
Wave transmission lines and networks
Coupling networks
Nonreciprocal gyromagnetic type
148108, 324232, 335284, 333234, 333205, H01P 130, H01P 132
Patent
active
045756953
ABSTRACT:
An apparatus and method for selectively orientating a ferrimagnetic body along a selected temperature invariant crystallographic axis includes a first pair of coils disposed for producing a magnetic field along a first direction, and a second pair of coils disposed within the first pair of coils for producing a magnetic field along a second direction, the direction of such second field being displaced at a predetermined angle .theta., with respect to the direction of said first field. A platform upon which the ferrimagnetic body is supported is disposed at an intersection of such fields and has a surface disposed at a predetermined direction with respect to a horizontal plane. A series of alternate pulsed magnetic fields is generated in turn by each pair of coils and the body rotates in response to each one of such fields. After pulsed fields have been generated, the so-called "easy axis" of the crystallographic structure of the body is aligned with the axis of the coils. A suitable member is then attached to said body at a predetermined bias direction determined by the directional displacement of an upper portion of the platform. Thus, the rotation of the ferrimagnetic body by the magnetic fields in combination with the calibrated attachment of the member to the ferrimagnetic body at the predetermined bias angle provides a ferrimagnetic body orientated along a temperature invarient crystallographic axis.
REFERENCES:
patent: 3067140 (1962-12-01), Davis, Jr.
patent: 3246263 (1966-04-01), Clark
patent: 3839677 (1974-10-01), Sedin
patent: 3924211 (1975-12-01), Ioffe et al.
Gensler Paul
Maloney Denis G.
Raytheon Company
Sharkansky Richard M.
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