Patent ID: 8629738

Claim:
A bandpass filter comprising: a laminated body comprising: i) a plurality of laminated dielectric layers; ii) a ground electrode on a first surface of the laminated body, operable to be connected to a standard potential; iii) a plurality of complex resonance electrodes, located on a first interlayer of the laminated body, each of the complex resonance electrodes comprising: a first end portion; and a second end portion which is divided into a plurality of divided portions arranged side by side, each divided portion having a strip shape, wherein each of the complex resonance electrodes is operable to be connected to the standard potential at its first end portion and resonate at a first frequency while the plurality of divided portions are operable to resonate at a second frequency higher than the first frequency; wherein adjacent ones of the plurality of complex resonance electrodes are arranged side by side such that the first end portion and the second end portion are alternately arranged, and the complex plurality of resonance electrodes are electromagnetically coupled to each other; iv) an input coupling electrode: having a strip shape; located on a second interlayer different from the first interlayer of the laminated body; facing to an input stage divided portion among the plurality of divided portions of an input stage complex resonance electrode among the plurality of complex resonance electrodes; electromagnetically coupled to the input stage divided portion; and having an electrical signal input point into which electrical signals are input; and v) an output coupling electrode: having a strip shape; located on a third interlayer different from the first interlayer of the laminated body; facing to an output stage divided portion among the plurality of divided portions of an output stage complex resonance electrode among the plurality of complex resonance electrodes; electromagnetically coupled to the output stage divided portion; and having an electrical signal output point into which said electrical signals are output.