Patent ID: 11881608
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. The filter device according to claim 2, wherein
the first filter is a ladder filter including a plurality of parallel arms that branch off from a series arm connecting the common terminal and the first individual terminal;
none of the plurality of surface acoustic wave resonators are disposed between the common terminal and a first branch node at which a parallel arm branches off from the series arm as seen from the common terminal; and
among the plurality of surface acoustic wave resonators, at least one of a surface acoustic wave resonator disposed between the first branch node and a second branch node at which a parallel arm branches off from the series arm as seen from the common terminal, a surface acoustic wave resonator disposed between the second branch node and a third branch node at which a parallel arm branches off from the series arm as seen from the common terminal, a surface acoustic wave resonator disposed on the parallel arm which branches off from the first branch node of the series arm, and a surface acoustic wave resonator disposed on the parallel arm which branches off from the second branch node of the series arm includes the plurality of divided resonators.