公开(公告)号：US11955681B2

公开(公告)日：2024-04-09

申请号：US17556559

申请日：2021-12-20

Applicant: TDK CORPORATION

Inventor： Honoka Atsuchi ,  Yuta Ashida ,  Longfei Yi ,  Yoshinori Matsumaru ,  Shuhei Sawaguchi ,  Masahiro Tatematsu ,  Shigemitsu Tomaki

IPC: H01P1/20

CPC classification number: H01P1/20

Abstract: A band-pass filter includes a first input/output port, a second input/output port, a plurality of resonators, and a multilayer stack. The multilayer stack includes a plurality of stacked dielectric layers. Each of the resonators is an open-ended resonator formed of a conductor line in the multilayer stack. Each of the resonators includes a resonator conductor portion including a first line part and a second line part located away from each other in a direction orthogonal to a stacking direction of the plurality of dielectric layers, and a third line part connecting the first line part and the second line part. The first to third line parts extend to surround a space between the first line part and the second line part.