公开(公告)号：US20210203306A1

公开(公告)日：2021-07-01

申请号：US17108039

申请日：2020-12-01

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Tetsu TAKAHASHI ,  Toru YAMAJI ,  Takuma KUZUSHITA

IPC: H03H9/64 ,  H03H9/25 ,  H03H9/02 ,  H03H9/145

Abstract: An acoustic wave filter includes a first resonance circuit including a first series arm resonator and a first capacitive element. The first series arm resonator is provided on a path connecting a first terminal and a second terminal. The first capacitive element is coupled in parallel with the first series arm resonator. The first series arm resonator includes a first divided resonator and a second divided resonator coupled in series with each other. The first resonance circuit includes a second resonance circuit including the first divided resonator and a second capacitive element coupled in parallel with the first divided resonator.

公开(公告)号：US20210265970A1

公开(公告)日：2021-08-26

申请号：US17161723

申请日：2021-01-29

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Toru YAMAJI ,  Tetsu TAKAHASHI

IPC: H03H9/02 ,  H03H9/145 ,  H03H9/64 ,  H03H9/25

Abstract: An acoustic wave device includes first and second acoustic wave elements. The first acoustic wave element is disposed on a piezoelectric substrate, and includes at least one first IDT electrode. The second acoustic wave element is disposed on the piezoelectric substrate, and includes at least one second IDT electrode. The first and second acoustic wave elements are adjacent to each other in the direction of acoustic wave propagation. A diffracting component that diffracts an acoustic wave is disposed between the first IDT electrode and the second IDT electrode. The diffracting component includes a gap that defines and functions as a slit to diffract an acoustic wave.