Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Reexamination Certificate
2005-12-20
2005-12-20
Ham, Seungsook (Department: 2817)
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
C333S219000
Reexamination Certificate
active
06977564
ABSTRACT:
A bandpass filter includes a dielectric substrate, a resonator electrode that is provided on a portion of a plane at an intermediate height in the thickness direction of the dielectric substrate so as to oppose the top face of the dielectric substrate and includes an aperture, first and second ground electrodes provided over and under the resonator electrode, respectively, so as to oppose the resonator electrode with dielectric layers disposed therebetween and so as to sandwich the resonator electrode, input-output coupling electrodes coupled to the resonator electrode, input-output terminal electrodes that are provided on the outside surface of the dielectric substrate and are electrically connected to the input-output coupling electrodes, and a via-hole electrode that penetrates through the aperture in the thickness direction of the dielectric substrate so as not to be electrically connected to the resonator electrode and is electrically connected to the first and second ground electrodes.
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Kanba Seiji
Mizoguchi Naoki
Okamura Hisatake
Ham Seungsook
Keating & Bennett LLP
Murata Manufacturing Co. Ltd.
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