Patent ID: 8847707

Claim:
A filter comprising: a multilayer body including a plurality of insulator layers stacked on top of one another in a stacking direction; an input electrode and an output electrode each provided on a surface of the multilayer body; a first resonator that is connected to the input electrode and includes a first coil; a second resonator that is connected to the output electrode and includes a second coil; and a third resonator that includes a third coil that is magnetically coupled with at least one of the first coil and the second coil; wherein the first coil and the second coil respectively include a first coil conductor layer and a second coil conductor layer provided on a surface of an insulator layer of the plurality of insulator layers; the third coil includes at least one via hole conductor that penetrates through the insulator layer in the stacking direction and a connection conductor layer provided on a surface of one of the plurality of insulator layers and connected to the at least one via hole conductor, the third coil including at least one turn; each of the first coil conductor layer and the second coil conductor layer provided on the surface of the insulator layer has a partial loop shape including a plurality of turns; an axis about which the plurality of turns of the first coil conductor layer turn and an axis about which the plurality of turns of the second coil conductor layer turn extend in the stacking direction and an axis about which the at least one turn of the third coil turns extends in a direction perpendicular or substantially perpendicular to the stacking direction; and no portion of the first coil and no portion of the second coil are provided on the surface of the one of the plurality of insulator layers on which the connection conductor layer is provided.