PURPOSE: To obtain a laminated dielectric filter whose attenuation characteristic is improved to make the band narrow and having a structure suitable for miniaturization.
CONSTITUTION: A resonator element 21 at the side of an input terminal and an electrode 31 opposite to an open end of the resonator element 21 at the side of the, input terminal are formed on a right side face of a dielectric layer 11, and an input electrode 41 overlapped on part of the resonator element 21 at the side of the input terminal is formed to a right side face of a dielectric layer 12. An output electrode 42 overlapped on part of a resonator element 22 at the side of an output terminal and overlapped on the entire face of the input electrode 41 is formed on a right side face of a dielectric layer 13, a resonator element 22 at the side of an output terminal and an electrode 32 opposite to an open end of the resonator element 22 at the side of the output terminal are formed on a right side face of a dielectric layer 14. Then the dielectric layers 11-15 are integrally formed. Since a static capacitance is formed to the overlapped parts of the input electrode 41 and the output electrode 42, an attenuation peak is formed to both sides of a pass band of the filter.
HIRAI TAKAMI
YANO SHINSUKE
