Patent ID: 11881844
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A multiplexer comprising: a switch including a common terminal, a first selection terminal, a second selection terminal, and a third selection terminal, the switch being configured to selectively connect the common terminal to the first selection terminal, to the second selection terminal, to the third selection terminal, or simultaneously to at least two of the first selection terminal, the second selection terminal, and the third selection terminal; a first filter connected to the first selection terminal, the first filter having a first pass band; a second filter connected to the second selection terminal, the second filter having a second pass band that is different from the first pass band; and a coupling circuit connected to the third selection terminal and the first filter, the coupling circuit being configured to form a signal path between the third selection terminal and the first filter by electromagnetic coupling,
wherein the coupling circuit includes a first circuit element connected to the third selection terminal and a second circuit element connected to the first filter, and the first circuit element and the second circuit element are electrically coupled or magnetically coupled to one another.