Abstract: A branching filter includes a first diplexer, a second diplexer, and a third diplexer. An input end of the first diplexer is connected to an input port. An input end of the second diplexer and an input end of the third diplexer are connected to two output ends of the first diplexer, respectively. Two output ends of the second diplexer are connected to first and second output ports, respectively. Two output ends of the third diplexer are connected to third and fourth output ports, respectively.

Abstract: An electronic component includes a stack including a plurality of first conductors and a plurality of second conductors. The plurality of first conductors include a first conductor group. The plurality of second conductors include a second conductor group arranged in a region adjacent to a region where the first conductor group is arranged. The plurality of first conductors further include a third conductor group arranged in a region adjacent to the region where the second conductor group is arranged and located to sandwich, with the region where the first conductor group is arranged, the region where the second conductor group is arranged. The first conductor group constitutes a plurality of parallel resonant circuits. The second conductor group constitutes a serial resonant circuit. The third conductor group constitutes another parallel resonant circuit.

Abstract: A multilayer electronic component includes a stack and a balun. The stack includes a plurality of stacked dielectric layers and conductor layers. The balun is formed using the stack. The balun includes an unbalanced transmission line and first to fourth balanced transmission lines. The unbalanced transmission line includes a first line portion and a second line portion connected in series. The first and second balanced transmission lines are configured to be electromagnetically coupled to the first line portion. The third and fourth balanced transmission lines are configured to be electromagnetically coupled to the second line portion.

Abstract: A multilayer electronic component includes a stack and a balun. The stack includes a plurality of stacked dielectric layers and conductor layers. The balun is formed using the stack. The balun includes an unbalanced transmission line and first to fourth balanced transmission lines. The unbalanced transmission line includes a first line portion and a second line portion connected in series. The first and second balanced transmission lines are configured to be electromagnetically coupled to the first line portion. The third and fourth balanced transmission lines are configured to be electromagnetically coupled to the second line portion.