公开(公告)号：US20200021003A1

公开(公告)日：2020-01-16

申请号：US16578740

申请日：2019-09-23

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Ryangsu KIM ,  Katsuya SHIMIZU ,  Yasushi SHIGENO ,  Daisuke TOKUDA ,  Mikiko FUKASAWA

IPC: H01P5/04 ,  H01R13/66

Abstract: Bidirectional detection is performed with a suppressed increase in return loss at an output terminal. A bidirectional coupler includes a detection port, a main line connected to a first port and a second port, a sub-line, a termination circuit, a switch circuit that switches each of one end and another end of the sub-line to the termination circuit or the detection port, and a matching network disposed between the switch circuit and the detection port and including at least one of a first variable capacitor, a first variable inductor, or a first variable resistor. In a first mode for detecting a first signal, the switch circuit connects the one end of the sub-line to the detection port, and connects the other end of the sub-line to the termination circuit.