Patents Assigned to MURATA MANUFACTURING CO., LTD.452644
  • Filter device and multiplexer
    Patent number: 11405021
    Abstract: A filter device includes a filter circuit that is connected to terminals, is defined by a first acoustic wave resonator that has a first frequency band as a pass band, and an additional circuit that is connected in parallel to at least one first acoustic wave resonator between the terminal and the terminal. The additional circuit is defined by a second acoustic wave resonator in which an electromechanical coupling coefficient of the additional circuit is different from an electromechanical coupling coefficient of the filter circuit.
    Type: Grant
    Filed: June 11, 2020
    Date of Patent: August 2, 2022
    Assignee: MURATA MANUFACTURING CO., LTD.452644
    Inventor: Masato Araki