公开(公告)号：US10432165B2

公开(公告)日：2019-10-01

申请号：US15842226

申请日：2017-12-14

Applicant: TDK CORPORATION

Inventor： Hiroya Suzuki ,  Noriaki Ootsuka ,  Yuta Ashida

IPC: H03H7/42 ,  H01P5/10

Abstract: Provided is a balanced/unbalanced converter (1) that includes a first strip line (40), a second strip line (41), a third strip line (42), a fourth strip line (43), an unbalanced terminal (4), and an open terminal (7). The first strip line (40) includes a spiral first conductor (19), and the second strip line (41) includes a spiral second conductor (14). An outer circumferential end (19b) of the first conductor (19) is electrically connected to the unbalanced terminal (4), and an outer circumferential end (14a) of the second conductor (14) is electrically connected to the open terminal (7).

公开(公告)号：US10263600B2

公开(公告)日：2019-04-16

申请号：US15355443

申请日：2016-11-18

Applicant: TDK CORPORATION

Inventor： Kazuhiro Tsukamoto ,  Hiroya Suzuki

IPC: H03H9/54 ,  H03H7/01 ,  H03H9/70 ,  H03H9/72 ,  H03H9/64

Abstract: A branching filter includes a first band-pass filter provided between a common port and a first signal port, and a second band-pass filter provided between the common port and a second signal port. The first band-pass filter includes a first LC resonant circuit and a first resonant circuit section provided in series. The first resonant circuit section includes a first acoustic wave resonator. The second band-pass filter includes a second LC resonant circuit and a second resonant circuit section provided in series. The second resonant circuit section includes a second acoustic wave resonator and an inductor connected in parallel.

公开(公告)号：US10554195B2

公开(公告)日：2020-02-04

申请号：US16291569

申请日：2019-03-04

Applicant: TDK CORPORATION

Inventor： Kazuhiro Tsukamoto ,  Hiroya Suzuki

IPC: H03H9/54 ,  H03H9/64 ,  H03H9/70 ,  H03H9/72 ,  H03H7/01

Abstract: A branching filter includes a first band-pass filter provided between a common port and a first signal port, and a second band-pass filter provided between the common port and a second signal port. The first band-pass filter includes a first LC resonant circuit and a first resonant circuit section. The first resonant circuit section includes a first acoustic wave resonator. The second band-pass filter includes a second LC resonant circuit and a second resonant circuit section. The second resonant circuit section includes a second acoustic wave resonator and an inductor connected in parallel.

公开(公告)号：US10193527B2

公开(公告)日：2019-01-29

申请号：US15355445

申请日：2016-11-18

Applicant: TDK CORPORATION

Inventor： Kazuhiro Tsukamoto ,  Hiroya Suzuki

IPC: H03H9/54 ,  H03H9/64 ,  H03H9/70 ,  H03H9/72 ,  H03H7/075 ,  H03H7/01

Abstract: A branching filter includes a low-pass filter provided between a common port and a first signal port, and a high-pass filter provided between the common port and a second signal port. The low-pass filter includes: a first LC resonant circuit; and a first acoustic wave resonator provided in a shunt circuit connecting a path leading from the first LC resonant circuit to the first signal port to a ground. The high-pass filter includes: a second LC resonant circuit; and a second acoustic wave resonator provided in a path leading from the second LC resonant circuit to the second signal port.