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US 10,707,573 B2Granted
Antenna device and electronic apparatus
AssigneeMurata Manufacturing Co., Ltd.
InventorsKentaro Mikawa, Tsuyoshi Suesada
Life of this patent
Estimating the term…
Abstract
An antenna device includes a first coil antenna conductor including first and second ends, a second coil antenna conductor including third and fourth ends, and a switching circuit. The first coil antenna conductor is wound around an axis and the second coil antenna conductor is wound around an axis. The switching circuit switches a connection state of the first coil antenna conductor and the second coil antenna conductor between connection states including series connection and parallel connection.
Claims20
An antenna device comprising:
- a first coil antenna conductor wound around a first axis and including a first end and a second end;
- a second coil antenna conductor wound around a second axis and including a third end and a fourth end;
- and
- a switching circuit to switch a first connection state in which the first coil antenna conductor and the second coil antenna conductor are connected in parallel and a second connection state in which the first coil antenna conductor and the second coil antenna conductor are connected in series;
- wherein
- the first coil antenna conductor and the second coil antenna conductor are provided on a same plane.
3 more elements
An electronic apparatus comprising:
- an antenna device;
- and
- a power feeding circuit connected to the antenna device;
- wherein
- the antenna device includes:
- a first coil antenna conductor wound around a first axis and including a first end and a second end;
- a second coil antenna conductor wound around a second axis and including a third end and a fourth end;
- and
- a switching circuit to switch a first connection state in which the first coil antenna conductor and the second coil antenna conductor are connected in parallel and a second connection state in which the first coil antenna conductor and the second coil antenna conductor are connected in series;
- the switching circuit is connected to the power feeding circuit;
- the switching circuit includes:
- a first switching portion to switch the first end of the first coil antenna conductor and the third end of the second coil antenna conductor into either of a connection or disconnection state;
- and
- a second switching portion to switch the second end of the first coil antenna conductor and the fourth end of the second coil antenna conductor into either of a connection or disconnection state;
- the power feeding circuit includes a first system power feeding circuit for a first system and a second system power feeding circuit for a second system;
- the first switching portion and the second switching portion are connected to either of the first system power feeding circuit or the second system power feeding circuit;
- and
- the first system power feeding circuit is a near field communication system.
15 more elements
An electronic apparatus comprising:
- an antenna device;
- and
- a power feeding circuit connected to the antenna device;
- wherein
- the antenna device includes:
- a first coil antenna conductor wound around a first axis and including a first end and a second end;
- a second coil antenna conductor wound around a second axis and including a third end and a fourth end;
- and
- a switching circuit to switch a first connection state in which the first coil antenna conductor and the second coil antenna conductor are connected in parallel and a second connection state in which the first coil antenna conductor and the second coil antenna conductor are connected in series;
- the switching circuit is connected to the power feeding circuit;
- and
- the first coil antenna conductor and the second coil antenna conductor are provided on a same plane.
9 more elements
Dependencies are inferred from the claim text.