US 12,456,791 B2Granted

Directional coupler, radio-frequency module, and communication device

AssigneeMurata Manufacturing Co., Ltd.

InventorsDaisuke Tokuda, Ryangsu Kim, Yuuta Miyazaki, Naoya Akashi

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Abstract

A directional coupler includes a first main line, a second main line, first sub-lines, second sub-lines, a first output terminal, a second output terminal, a first inductor, and a second inductor. The first output terminal is configured to be coupled to the first sub-lines. The first output terminal is configured to output a first detection signal corresponding to a first radio-frequency signal transferred through the first main line. The second output terminal is configured to be coupled to the second sub-lines. The second output terminal is configured to output a second detection signal corresponding to a second radio-frequency signal transferred through the second main line. The first inductor is provided in a first signal path including the first output terminal. The second inductor is provided in a second signal path including the second output terminal.

Claims18

Dependent claims

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.

8 more elements

A directional coupler comprising:

a main line;
a sub-line electromagnetically coupled to the main line;
a first output terminal coupled to the sub-line, the first output terminal being configured to output a first detection signal corresponding to a radio-frequency signal transferred through the main line;
a second output terminal configured to output an external second detection signal;
a first inductor in a first signal path, the first signal path including the first output coupling 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 an external output terminal, a first selection terminal coupled to the sub-line, and a second selection terminal coupled to an external input terminal and configured to receive an external detection signal,
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.

6 more elements

Dependencies are inferred from the claim text.