公开(公告)号：US20170214390A1

公开(公告)日：2017-07-27

申请号：US15355443

申请日：2016-11-18

Applicant: TDK CORPORATION

Inventor： Kazuhiro TSUKAMOTO ,  Hiroya SUZUKI

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

CPC classification number: H03H9/542 ,  H03H7/1758 ,  H03H7/1766 ,  H03H7/1775 ,  H03H9/64 ,  H03H9/703 ,  H03H9/706 ,  H03H9/72 ,  H03H9/725

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：US20150028965A1

公开(公告)日：2015-01-29

申请号：US14325775

申请日：2014-07-08

Applicant: TDK CORPORATION

Inventor： Kazuhiro TSUKAMOTO ,  Masanori TSUTSUMI

IPC: H03H7/46

CPC classification number: H03H7/461 ,  H03H7/175 ,  H03H7/1766 ,  H03H7/1775

Abstract: A diplexer includes a first bandpass filter provided between an input terminal and a first output terminal and selectively passing a signal in a first frequency band, and a second bandpass filter provided between the input terminal and a second output terminal and selectively passing a signal in a second frequency band. The first bandpass filter includes a plurality of first resonators. The second bandpass filter includes a second resonator and a series resonant circuit. The series resonant circuit is composed of a capacitor provided between the input terminal and the second resonator, and an inductance component of a line that connects the input terminal and the second resonator via the capacitor.

Abstract translation: 双工器包括：设置在输入端和第一输出端之间并选择性地通过第一频带中的信号的第一带通滤波器和设置在输入端和第二输出端之间的第二带通滤波器， 第二频带。 第一带通滤波器包括多个第一谐振器。 第二带通滤波器包括第二谐振器和串联谐振电路。 串联谐振电路由设置在输入端子和第二谐振器之间的电容器和通过电容器连接输入端子和第二谐振器的线路的电感分量组成。