An electronic component includes: a first conductor extending in one direction; a second conductor extending in the one direction; a first inductor conductor bridged so as to linearly extend between an end portion of the first conductor in its extending direction and an end portion of the second conductor in its extending direction; a connecting conductor that extends in the one direction and has a first end portion and a second end portion in its extending direction, the first end portion being connected to the first inductor conductor and being located between the first conductor and the second conductor; and a capacitor pad electrically connected to the second end portion of the connecting conductor.

A filter includes a first capacitor connected in series between a first terminal pair and a second terminal pair, a first inductor connected in parallel with the first capacitor, and a second inductor connected in parallel between the first terminal pair and the second terminal pair. The first inductor and the second inductor are magnetically coupled to each other and are differentially connected to each other.

A filter includes a first port, a second port, and a high-pass filter provided between the first port and the second port in a circuit configuration. The high-pass filter includes a first capacitive element provided in a path connecting the first port and the second port, an inductor provided between the path and the ground, and a second capacitive element connected in parallel with the inductor.

A band-pass filter includes a first inductor and a second inductor electromagnetically coupled to each other, a first ground terminal electrically connected to the first inductor, a second ground terminal electrically connected to the second inductor, and a stack for integrating the first inductor, the second inductor, the first ground terminal, and the second ground terminal. The first ground terminal and the second ground terminal are each connected to a ground and are not electrically connected to each other in the stack.

A coupled resonator filter including a first parallel resonator including a first capacitance connected in parallel with a first inductance. The filter includes a second parallel resonator including a second capacitance connected in parallel with a second inductance and a third parallel resonator including a third capacitance connected in parallel with a third inductance. Magnetic coupling between the first inductance and the second inductance, between the second inductance and the third inductance, and between the first inductance the third inductance occurs in accordance with first, second and third coupling factors, respectively. A frequency response of the coupled resonator filter includes a notch when values of the first coupling factor, the second coupling factor and the third coupling factor satisfy predetermined conditions.

A filter device includes a multilayer body including dielectric layers, an input terminal, an output terminal, a ground terminal, a common electrode, a ground electrode, resonators, a shield electrode, and ground vias. A first ground via couples the shield electrode and the ground electrode via the common electrode. A second ground via directly couples the shield electrode and the ground electrode without passing the common electrode. A first via of a first resonator has one end coupled to the common electrode and another end coupled to the input terminal. A first plate electrode is coupled to the first via and at least partially overlaps the ground electrode when viewed in plan view. A second resonator includes second vias and a second plate electrode. The second plate electrode is coupled to the second via and at least partially overlaps the ground electrode when viewed in plan view in the stacking direction.

The filter device includes: a first body including an inductor and a capacitor; a second body that is mounted on the first body and that includes an acoustic wave element; a filter circuit including an inductor, a capacitor, and an acoustic wave element; a first capacitor; and a second capacitor. The first body further includes a first signal terminal and a second signal terminal. The filter circuit is, in a circuit configuration, provided between the first signal terminal and the second signal terminal. The first capacitor is provided on a first path connecting the first signal terminal and the filter circuit. The second capacitor is provided on a second path connecting the second signal terminal and the filter circuit.

A filter includes a first input/output terminal, a second input/output terminal, a third input/output terminal, a fourth input/output terminal, a first stage resonant circuit connected between the first input/output terminal and the second input/output terminal, at least one intermediate stage resonant circuit, and a final stage resonant circuit connected between the third input/output terminal and the fourth input/output terminal. The first stage resonant circuit and the final stage resonant circuit each include an inductor. The at least one intermediate stage resonant circuit includes an inductor and a capacitor connected in parallel to each other, and one end of the inductor and one end of the capacitor connected in parallel to the inductor are connected to a reference potential.

A filter device includes a multilayer body in which multiple dielectric layers are stacked, a ground terminal, and a first LC parallel resonator, a second LC parallel resonator, and a third LC parallel resonator located in the multilayer body and magnetically coupled to each other. The first LC parallel resonator includes a first conductor, the second LC parallel resonator includes a second conductor, and the third LC parallel resonator includes a third conductor. The filter device further includes a connection conductor on a layer different from a layer on which the second conductor is located, a first via including one end connected to the first conductor and another end connected to the connection conductor, and a second via including one end connected to the third conductor and another end connected to the connection conductor. The connection conductor includes a first region that overlaps a portion of the second conductor in plan view of the multilayer body seen in a stacking direction.

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.