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

Claim 0:
1. A filter device comprising:
a common terminal;
first and second individual terminals;
a first filter connected between the common terminal and the first individual terminal;
a second filter connected between the common terminal and the second individual terminal, a pass band of the second filter being in a frequency range lower than a pass band of the first filter; wherein
the first filter includes a plurality of surface acoustic wave resonators, at least one of the plurality of surface acoustic wave resonators including a plurality of divided resonators connected in parallel with each other, each of the plurality of divided resonators including an interdigital transducer;
the plurality of divided resonators include at least two divided resonators, and among the at least two divided resonators, a pitch of the interdigital transducer of a divided resonator is different from a pitch of the interdigital transducer of another divided resonator; and
the interdigital transducers of the plurality of divided resonators are displaced from each other in a direction that is parallel or substantially parallel to an arrangement direction of electrode fingers of at least one of the at least two divided resonators and in a direction perpendicular or substantially perpendicular to the arrangement direction of the electrode fingers.