公开(公告)号：US09385411B2

公开(公告)日：2016-07-05

申请号：US14606339

申请日：2015-01-27

Applicant: TDK CORPORATION

Inventor： Takeshi Ohashi ,  Yukio Mitake

IPC: H01P5/18 ,  H01P3/08

CPC classification number: H01P5/187

Abstract: A directional coupler includes a main line and a subline. The main line connects an input port and an output port. The subline connects a coupling port and a terminal port. The subline includes a first coupling line section connected to the terminal port, a second coupling line section connected to the coupling port, and a low-pass filter. The low-pass filter includes an inductor provided between the first and second coupling line sections, a first capacitor having an end connected to the connection point between the inductor and the second coupling line section, a resistor connecting the other end of the first capacitor to the ground, and a second capacitor connecting the connection point between the inductor and the first coupling line section to the ground.

Abstract translation: 定向耦合器包括主线和子线。 主线连接输入端口和输出端口。 分线连接一个耦合端口和一个端口。 分线包括连接到终端口的第一耦合线部分，连接到耦合端口的第二耦合线部分和低通滤波器。 所述低通滤波器包括设置在所述第一和第二耦合线路部分之间的电感器，具有连接到所述电感器和所述第二耦合线路部分之间的连接点的端部的第一电容器，将所述第一电容器的另一端连接到 接地，以及将电感器和第一耦合线部分之间的连接点连接到地的第二电容器。