Wave transmission lines and networks – Resonators – Magnetic type
Patent
1992-09-30
1994-12-06
Ham, Seungsook
Wave transmission lines and networks
Resonators
Magnetic type
333245, H01P 1218
Patent
active
053714822
ABSTRACT:
A circuit element utilizing magnetostatic is formed with an acoustic wave absorbing layer on the other major surface of a non-magnetic substrate remote from the major surface where a magnetostatic wave propagation medium is formed, for the purpose of effectively suppressing an unnecessary spurious mode over a wide frequency band so as to obviate undesirable degradation of the resonance characteristic. That is, the circuit element utilizing the magnetostatic wave includes a thin film of YIG formed on one of the major surfaces of the non-magnetic substrate of GGG by the method of liquid phase epitaxial growth, and electrodes formed on the YIG thin film. In the circuit element, an acoustic wave absorbing layer is formed on the other major surface of the GGG substrate remote from the major surface where the YIG thin film is formed.
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"MSSW Resonators with Straight Edge Reflectors", Ernst Ruijer et al., IEEE Transactions on Magnetic, vol. Mag-20, No. 5, Sep. 1984.
Ito Kohei
Murakami Yasuhide
Ham Seungsook
Hitachi Metals Ltd.
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