Patent ID: 7548135

Claim:
A filter comprising: a filter chip; a laminated portion on which the filter chip is mounted; an input/output terminal provided in the laminated portion; a first U-shaped line pattern provided on a first layer and coupled to the filter chip, the first layer being included in the laminated portion between the filter chip and the input/output terminal; a second U-shaped line pattern provided on a second layer to substantially overlap the first U-shaped line pattern and coupled to the first U-shaped line pattern and the input/output terminal, the second layer being included in the laminated portion between the first layer and the input/output terminal; and a third U-shaped line pattern, which is provided in one or more layers in the laminated portion between the second layer and the input/output terminal, is coupled to the second U-shape line pattern and the input/output terminal, and has a same current direction as a current flowing across the second U-shape line pattern; wherein the first U-shaped line pattern, the second U-shaped line pattern, and the third U-shaped line pattern are formed to overlap the input/output terminal.