Microwave ferrite resonator with parallel permanent magnet bias

Details Microwave ferrite resonator with parallel permanent magnet bias Microwave ferrite resonator with parallel permanent magnet bias

1996-04-24

1997-10-14

Lee, Benny

Wave transmission lines and networks

Resonators

Magnetic type

333202, H01P 700

Patent

active

056776527

ABSTRACT:
A magnetic structure for a ferrite-based electromagnetic resonator comprises a toroidal permanent magnet which surrounds high permeability material forming a gap in which there is for example a YIG sphere which is tunably resonant in a magnetic field. The high permeability material also forms part of a magnetic circuit. A main electromagnetic coil, preferably a solenoid, surrounds the permanent magnetic structure and the high permeability material, and a modulation coil, also preferably in the form of a toroid, also surrounds the gap in the magnetic circuit.

REFERENCES:
patent: 4516096 (1985-05-01), Doyen
patent: 4679015 (1987-07-01), Murakami et al.
patent: 4701729 (1987-10-01), Ito et al.
patent: 4945324 (1990-07-01), Murakami et al.
patent: 5309127 (1994-05-01), Mariani
patent: 5428324 (1995-06-01), Anderson et al.
patent: 5517161 (1996-05-01), Anderson et al.

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