US 12,456,791 B2
Directional coupler, radio-frequency module, and communication device
Daisuke Tokuda, Kyoto (JP); Ryangsu Kim, Kyoto (JP); Yuuta Miyazaki, Kyoto (JP); and Naoya Akashi, Kyoto (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Kyoto (JP)
Filed by Murata Manufacturing Co., Ltd., Kyoto (JP)
Filed on Aug. 15, 2023, as Appl. No. 18/449,909.
Claims priority of application No. 2022-135410 (JP), filed on Aug. 26, 2022.
Prior Publication US 2024/0072407 A1, Feb. 29, 2024
Int. Cl. H01P 5/18 (2006.01)
CPC H01P 5/188 (2013.01) 18 Claims
OG exemplary drawing
 
1. A directional coupler comprising:
a first main line;
a second main line;
a first sub-line electromagnetically coupled to the first main line;
a second sub-line electromagnetically coupled to the second main line;
a first output terminal coupled to the first sub-line, the first output terminal being configured to output a first detection signal corresponding to a first radio-frequency signal transferred through the first main line;
a second output terminal coupled to the second sub-line, the second output terminal being configured to output a second detection signal corresponding to a second radio-frequency signal transferred through the second main line;
a first inductor in a first signal path, the first signal path including the first output terminal;
a second inductor in a second signal path, the second signal path including the second output terminal; and
a switch having a first common terminal coupled to the first output terminal, a second common terminal coupled to the second output terminal, a first selection terminal coupled to the first sub-line, and a second selection terminal coupled to the second sub-line,
wherein in a first mode, the switch is configured to couple the first common terminal to the first selection terminal, and to couple the second common terminal to the second selection terminal.