Wave transmission lines and networks – Resonators
Patent
1986-03-27
1987-07-07
LaRoche, Eugene R.
Wave transmission lines and networks
Resonators
333204, 333 241, H01P 708
Patent
active
046790152
ABSTRACT:
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.
REFERENCES:
patent: 4547754 (1985-10-01), Murakami et al.
Ito Seigo
Murakami Yoshikazu
Okamoto Hiromi
Tanaka Hideo
Ham Seung
LaRoche Eugene R.
Sony Corporation
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