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US 4,626,800 AGranted
YIG thin film tuned MIC oscillator
AssigneeSony Corporation
InventorsYoshikazu Murakami, Seigo Ito, Toshiro Yamada
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Abstract
A tuned oscillator is disclosed which comprises an active element, a resonator electrically connected to the active element and made of a magnetic material using ferro-magnetic resonance phenomenon, and a magnetic circuit for applying a magnetic field to the resonator. The resonator is made of an YIG (yttrium, iron and garnet) thin film magnetic resonance element formed by a thin film forming technique and utilizes an uniform mode ferro-magnetic resonance in the YIG thin film, and operating under the application of magnetic field of the magnetic circuit.
Claims8
A tuned oscillator comprising:
- an active element;
- and
- a ferromagnetic resonator connected to said active element;
- said ferromagnetic resonator being formed of a ferrimagnetic crystal, a microstrip line electromagnetically coupled to said ferrimagnetic crystal and D.C. (direct current), bias magnetic field means applying D.C. (direct current) bias magnetic field to said ferrimagnetic crystal, said ferrimagnetic crystal being formed of an YIG (yttrium, iron, garnet) thin film formed by a thin film forming technique and being processed to suppress magnetostatic modes of ferromagnetic resonance other than the uniform mode.
1 more element
Dependencies are inferred from the claim text.