公开(公告)号：US20200049888A1

公开(公告)日：2020-02-13

申请号：US16497001

申请日：2018-02-20

Applicant: TDK Corporation

Inventor： Hiroki HARA ,  Masahiro SHINKAI ,  Takashi KIKUKAWA ,  Masami SASAKI ,  Ryohei FUKUZAKI ,  Motohiro NAKAHARA ,  Tetsuo MIYA ,  Shuji TACHI ,  Koichi ARISHIMA

IPC: G02B6/26 ,  G02B6/42

Abstract: A first disclosure is an optical fiber member equipped with two holding members that hold an optical fiber such that an end surface of the optical fiber is located on one end and a curving portion having a coat of the optical fiber is curved to be extended at another end; the holding members are provided with holding flat portions that sandwich an end portion of the optical fiber where the coat is removed such that the end surface of the optical fiber is located on the one end; at least any of the holding flat portions has an aligning groove to fix a position of the end portion of the optical fiber; the holding member is provided with a curved surface at a position adjacent to the curving portion in the extending direction Dl; and the two holding members are equal in thermal expansion coefficient.

公开(公告)号：US20150180112A1

公开(公告)日：2015-06-25

申请号：US14638803

申请日：2015-03-04

Applicant: TDK Corporation

Inventor： Hajime KUWAJIMA ,  Toshiyasu FUJIWARA ,  Naoto OHYAMA ,  Yoshikazu TSUYA ,  Masami SASAKI

IPC: H01P5/18 ,  H04B1/04 ,  H04B1/00 ,  H03H7/01

CPC classification number: H01P5/18 ,  H03H7/0138 ,  H04B1/0053 ,  H04B1/0458

Abstract: A directional coupler according to the present invention includes a primary line for transmitting a transmission signal; an input port for inputting the transmission signal to the primary line; an output port for outputting the transmission signal from the primary line; a secondary line for electromagnetically coupling with the primary line to extract part of the transmission signal; a coupling port provided at one end of the secondary line; an isolation port provided at the other end of the secondary line; and a low pass filter unit having a function of low pass filter, disposed between the secondary line and the coupling port.

Abstract translation: 根据本发明的定向耦合器包括用于发送发送信号的主线路; 用于将传输信号输入到主线路的输入端口; 输出端口，用于从主线路输出发送信号; 用于与主线电磁耦合以提取部分传输信号的次级线路; 耦合端口，设置在所述次级线路的一端; 设置在次级线路的另一端的隔离端口; 以及具有低通滤波器功能的低通滤波器单元，设置在二次线路和耦合端口之间。