YIG sphere positioning apparatus

Details YIG sphere positioning apparatus YIG sphere positioning apparatus

1992-07-29

1994-03-01

Nelli, Raymond A.

Wave transmission lines and networks

Resonators

Magnetic type

333202, 333235, H01P 700

Patent

active

052911632

ABSTRACT:
In a tunable ferrimagnetic resonator circuit, apparatus and method for tuning the circuit by manipulation of the position of the YIG spheres with respect to their associated coupling loops and the magnetic field. Each YIG sphere can be moved in three axial directions or rotated for alignment with the magnetic field while the circuit is under test, without the need for removal of any parts and without visual observation. Once the sphere has been positioned, it is automatically retained in that position without the need to be encapsulated in epoxy. The tuning process can be repeated or the circuit can be retuned at any time. The tuning apparatus can be coupled to external tooling which is manually manipulatable. Limits are included in the external tooling to prevent the spheres from touching other portions of the circuit.

REFERENCES:
patent: 4420731 (1983-12-01), Schiebold et al.
patent: 4480238 (1984-10-01), Iwasaki
patent: 4667172 (1987-05-01), Longshore et al.
patent: 4675630 (1987-06-01), Tang et al.
patent: 4857871 (1989-08-01), Harris

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