Directional coupler, high frequency module, and communication device
AssigneeMurata Manufacturing Co., Ltd.
InventorsKenta Seki, Ryangsu Kim, Kazuhito Osawa
Life of this patent
Estimating the term…
Abstract
Degrees of a change in an insertion loss of a main line and a change in a phase of a signal are small regardless of whether or not detection is performed by using a sub-line. A directional coupler includes a main line, a sub-line, a first termination circuit, a second termination circuit, and a switch. The sub-line has a first end and a second end. The first termination circuit terminates the first end and the second end of the sub-line. The switch switches connection and disconnection between the sub-line and the first termination circuit.
Claims9
A directional coupler further comprising:
- a main line;
- a first sub-line having a first end and a second end;
- a first termination circuit and a second termination circuit configured to terminate the first end and the second end of the first sub-line, respectively;
- a first switch configured to selectively connect the first sub-line and the first termination circuit;
- a second sub-line that is connected in series with the first sub-line, the first sub-line and the second sub-line constituting a series circuit;
- a third termination circuit;
- a second switch;
- and
- a phase-shift circuit that is connected between the first sub-line and the second sub-line,
- wherein the third termination circuit is connected to the series circuit, and
- wherein the second switch is configured to selectively connect the series circuit and the third termination circuit.
A directional coupler comprising:
- a main line;
- a first sub-line having a first end and a second end;
- a first termination circuit and a second termination circuit configured to terminate the first end and the second end of the first sub-line, respectively;
- a first switch configured to selectively connect the first sub-line and the first termination circuit;
- a multilayer board having at least the main line therein;
- and
- an integrated circuit (IC) chip comprising the first termination circuit and the first switch,
- wherein the IC chip overlaps the main line in a plan view of the multilayer board.
A directional coupler comprising:
- a main line;
- a first sub-line having a first end and a second end;
- a first termination circuit and a second termination circuit configured to terminate the first end and the second end of the first sub-line, respectively;
- and
- a first switch configured to selectively connect the first sub-line and the first termination circuit,
- wherein the first termination circuit comprises:
- a first circuit having a third end and a fourth end, and
- a second circuit having a fifth end and a sixth end,
- wherein the third end of the first circuit is connected to the first end of the first sub-line, and the fourth end of the first circuit is connected to ground, and
- wherein the fifth end of the second circuit is connected to the second end of the first sub-line, and the sixth end of the second circuit is connected to ground.
Dependencies are inferred from the claim text.