Patent ID: 11916536
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. A filter device comprising:
a first filter between an input terminal and an output terminal; and
an additional circuit connected in parallel with the first filter between the input terminal and the output terminal; wherein
the additional circuit includes an IDT electrode group including a plurality of IDT electrodes that are arranged in an acoustic wave propagation direction;
the plurality of IDT electrodes that define the IDT electrode group include at least two first IDT electrodes that are connected to the input terminal and at least two second IDT electrodes that are connected the output terminal;
an average pitch of a plurality of electrode fingers of each of the at least two first IDT electrodes is different between the at least two first IDT electrodes; and
an average pitch of a plurality of electrode fingers of each of the at least two second IDT electrodes is different between the at least two second IDT electrodes.