公开(公告)号：US20210013858A1

公开(公告)日：2021-01-14

申请号：US17032281

申请日：2020-09-25

Applicant: Murata Manufacturing Co., Ltd.

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

IPC: H03H7/40 ,  H01P5/18

Abstract: A directional coupler (2) includes a main line (11), a sub-line (12), a variable terminator (13), and a variable filter circuit (15). The variable terminator (13) is a variable impedance circuit that terminates one end portion of the sub-line (12). The variable filter circuit (15) is connected to the other end portion of the sub-line (12). The variable filter circuit (15) may include a filter, a bypass path, and a switch which is connected to at least one of the filter and the bypass path.