Ferromagnetic resonator

Details Ferromagnetic resonator Ferromagnetic resonator

H - Electricity

01

P

333/57, 333/89

H01P 1/218 (2006.01)

Patent

CA 1248187

ABSTRACT OF THE DISCLOSURE A ferromagnetic resonator comprises a nonmagnetic substrate, a ferrimagnetic thin film element formed on a major surface of the nonmagnetic substrate, a strip line for example formed on another major surface of the nonmagnetic substrate and electromagnetically coupled to the ferrimagnetic thin film element, a conductive wall facing the strip line and spaced therefrom a predetermined distance, an end of the strip line being connected by the conductive wall to ground potential and a bias magnetic field source applying a D.C. magnetic field to the ferrimagnetic thin film perpendicular to the major surface thereof. Such an arrangement enables a drastic reduction in the effective dielectric constant of the transmission lines, whereby a filter with a high center frequency of the order of at least ten gigahertz can be achieved despite the short type structure.

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