公开(公告)号：US20190044493A1

公开(公告)日：2019-02-07

申请号：US16054929

申请日：2018-08-03

Applicant: Akoustis, Inc.

Inventor： Dae Ho KIM ,  Pinal PATEL ,  Rohan W. HOULDEN ,  James Blanton SHEALY ,  Jeffrey B. SHEALY

IPC: H03H9/58 ,  H03H9/02 ,  H03H9/17 ,  H03H9/13

Abstract: An elliptical-shaped resonator device. The device includes a bottom metal plate, a piezoelectric layer overlying the bottom metal plate, and a top metal plate overlying the piezoelectric layer. The top metal plate, the piezoelectric layer, and the bottom metal plate are characterized by an elliptical shape having a horizontal diameter (dx) and a vertical diameter (dy), which can be represented as ellipse ratio R=dx/dy. Using the elliptical structure, the resulting bulk acoustic wave resonator (BAWR) can exhibit equivalent or improved insertion loss, higher coupling coefficient, and higher quality factor compared to conventional polygon-shaped resonators.

公开(公告)号：US20210111695A1

公开(公告)日：2021-04-15

申请号：US17106736

申请日：2020-11-30

Applicant: Akoustis, Inc.

Inventor： Dae Ho KIM ,  Pinal PATEL ,  Rohan W. HOULDEN ,  James Blanton SHEALY ,  Jeffrey B. SHEALY

IPC: H03H9/02 ,  H03H9/13 ,  H03H9/17 ,  H03H9/56

Abstract: An elliptical-shaped resonator device. The device includes a bottom metal plate, a piezoelectric layer overlying the bottom metal plate, and a top metal plate overlying the piezoelectric layer. The top metal plate, the piezoelectric layer, and the bottom metal plate are characterized by an elliptical shape having a horizontal diameter (dx) and a vertical diameter (dy), which can be represented as ellipse ratio R=dx/dy. Using the elliptical structure, the resulting bulk acoustic wave resonator (BAWR) can exhibit equivalent or improved insertion loss, higher coupling coefficient, and higher quality factor compared to conventional polygon-shaped resonators.