High-frequency filter, front-end circuit, and communication apparatus

A high-frequency filter supporting a first communication band and a second communication band having a center frequency higher than the first communication band and partly overlapped with the first communication band, and including a first terminal and a second terminal, comprising:

• a ladder resonant circuit placed between the first terminal and the second terminal and including one or more series arm resonators and one or more parallel arm resonators;
• and
• a first attenuation circuit connected to a node between the ladder resonant circuit and the second terminal,
• wherein the first attenuation circuit includes a resonator and a switch,
• wherein one end of the resonator is connected to a first selection target terminal of the switch and another end of the resonator is connected to a ground potential,
• wherein the switch includes the first selection target terminal connected to the resonator, a second selection target terminal connected to a ground, and a common terminal selectively connected to the first selection target terminal or the second selection target terminal and connected to the node, and
• wherein the high-frequency filter switches between a state for a second communication band where the common terminal and the first selection target terminal of the switch are connected and a state for a first communication band where the common terminal and the second selection target terminal of the switch are connected.