Multiplexer, radio frequency front-end circuit, and communication device

A multiplexer comprising:

• a demultiplexing circuit comprising a first common terminal, a first individual terminal, and a second individual terminal;
• a first filter connected to the first individual terminal and configured to pass a first radio frequency signal in a first frequency band;
• and
• a second filter connected to the second individual terminal and configured to pass a second radio frequency signal in a second frequency band, the second frequency band at least partially overlapping the first frequency band,
• wherein the demultiplexing circuit further comprises:
• a first impedance circuit in a first path, the first path connecting the first common terminal and the first individual terminal,
• a second impedance circuit in a second path, the second path connecting the first common terminal and the second individual terminal,
• a third impedance circuit, and
• a switch circuit, and
• the switch circuit is configured to selectively connect the third impedance circuit between ground and either a first node on the first path or a second node on the second path, the first node being between the first impedance circuit and the first individual terminal, and the second node being between the second impedance circuit and the second individual terminal.