Patent ID: 8803634

Claim:
A branching device comprising: an antenna terminal arranged to be connected to an antenna; at least two signal terminals; a first LC filter circuit connected between the antenna terminal and each of the at least two signal terminals and arranged to allow a signal in a first frequency band from among signals input from one of the antenna terminal and the at least two signal terminals to pass therethrough; and a second LC filter circuit connected between the antenna terminal and each of the at least two signal terminals and arranged to allow a signal in a second frequency band from among signals input from one of the antenna terminal and the at least two signal terminals to pass therethrough; wherein the first LC filter circuit and the second LC filter circuit are provided in a laminated substrate in which a dielectric layer on which a conductor pattern is provided is laminated; the first LC filter circuit includes a first inductor arranged such that a portion of a first coil conductor defined by the conductor pattern is wound in a predetermined direction, and a second inductor arranged such that a remaining portion of the first coil conductor defined by the conductor pattern is wound in a direction opposite to the predetermined direction; the second LC filter circuit includes a third inductor arranged such that a second coil conductor defined by the conductor pattern is wound in the predetermined direction; and at least a portion of the third inductor is disposed on the same dielectric layer as the second inductor.