Electronic device for selectively using coils supporting power sharing

1. An electronic device comprising:

a power management circuit;

an antenna including a first coil and a second coil;

a transceiver circuit configured to transmit a power signal received from the power management circuit to the antenna and to transmit a power signal received from the antenna to the power management circuit, the transceiver circuit including a first transceiver terminal and a second transceiver terminal;

a first switch; and

a control circuit electrically connected to the first switch and the transceiver circuit,

wherein a first end of the second coil is connected to the first transceiver terminal,

wherein a second end of the second coil is connected to the second transceiver terminal,

wherein a first end of the first coil is connected to the first transceiver terminal through the first switch,

wherein a second end of the first coil is connected to the second transceiver terminal, and

wherein the control circuit is configured to control the first switch based on identification information of an external electronic device received from the antenna through the transceiver circuit.

2. The electronic device of claim 1 , further comprising:

a housing including:

a first surface directed towards a first direction, and

a second surface directed towards a second direction being opposite to the first direction, the first coil and the second coil being located inside the housing,

wherein the second coil is located inside the first coil as seen to face the second surface.

3. The electronic device of claim 2 ,

wherein the first coil includes a first outer diameter,

wherein the second coil includes a second outer diameter, and

wherein the first coil and the second coil are configured so that a total sum of inductances induced from the first coil and the second coil satisfies a designated condition in case that the first switch is in a close state.

4. The electronic device of claim 1 , wherein the control circuit is further configured to change a state of the first switch to an open state based on a kind of the identification information of the external electronic device indicating a product designated to use only the second coil in case that the first switch is in a close state.

5. The electronic device of claim 1 , further comprising:

a second switch; and

a third switch,

wherein the second end of the first coil is connected to the second transceiver terminal through the second switch,

wherein the second end of the first coil is connected to the first end of the second coil through the third switch, and

wherein the control circuit is further configured to:

open the second switch,

close the first switch and the third switch, and

transmit a payment signal to the antenna through the transceiver circuit based on a user authentication for payment.

6. The electronic device of claim 5 , wherein the control circuit is further configured to change a state of the first switch and the second switch to an open state based on a kind of the identification information of the external electronic device indicating a designated product in case that the third switch is in an open state and the first switch and the second switch are in a close state.

7. The electronic device of claim 5 , further comprising:

a fourth switch configured to connect the transceiver circuit to the power management circuit in a close state,

wherein the control circuit is further configured to:

apply a voltage for generating the payment signal to the transceiver circuit, and

actuate the fourth switch to an open state in case that the payment signal is transmitted.

8. The electronic device of claim 5 , wherein the payment signal comprises a magnetic signal including payment information corresponding to track information of a magnetic card.

9. The electronic device of claim 1 , wherein the control circuit is further configured to receive the power signal including the identification information of the external electronic device through the transceiver circuit.

10. The electronic device of claim 1 , further comprising:

a short-range communication circuit,

wherein the control circuit is further configured to receive the identification information of the external electronic device through the short-range communication circuit.

11. The electronic device of claim 1 , wherein the control circuit comprises an application processor.

12. The electronic device of claim 1 , wherein the control circuit comprises a circuit built in the transceiver circuit.

13. The electronic device of claim 1 , further comprising:

a first cover directed towards a first direction and forming a first surface of the electronic device;

a second cover directed towards a second direction being opposite to the first direction and forming a second surface of the electronic device;

a display located closer to the first cover than the second cover; and

a flexible printed circuit board (FPCB) located closer to the second cover than the first cover and including the antenna,

wherein the first coil is spirally wound around an axis being substantially parallel to the second direction, and

wherein the second coil is spirally wound around the axis.

14. The electronic device of claim 13 ,

wherein the FPCB is composed of a plurality of layers,

wherein a first part of the first coil is wound on a first layer of the FPCB, and a second part of the first coil is wound on a second layer of the FPCB, and

wherein a first part of the second coil is wound on the first layer, and a second end of the second coil is wound on the second layer.

15. A method for operating an electronic device, the method comprising:

acquiring identification information of an external electronic device in a first state in which a first coil and a second coil are connected in parallel to a transceiver circuit;

connecting at least one of the first coil or the second coil to the transceiver circuit based on the identification information; and

controlling the transceiver circuit to:

transmit a power signal to the external electronic device, or

receive a power signal from the external electronic device in a second state in which at least one of the first coil or the second coil is connected to the transceiver circuit.

16. The method of claim 15 , wherein the connecting of the at least one of the first coil or the second coil to the transceiver circuit comprises:

connecting only the second coil to the transceiver circuit, and

disconnecting the first coil and the transceiver circuit from each other based on a kind of the identification information of the external electronic device indicating a designated product in the first state.

17. The method of claim 15 , further comprising:

acquiring user identification information from an input device, a sensor, or a camera included in the electronic device;

performing a user authentication procedure based on the user identification information;

connecting the first coil and the second coil in series to the transceiver circuit based on the user authentication as a result of performing the authentication procedure; and

controlling the transceiver circuit to transmit a payment signal in a third state where the first coil and the second coil are connected in series to the transceiver circuit.

18. The method of claim 17 , wherein the payment signal comprises a magnetic signal including payment information corresponding to track information of a magnetic card.

19. An electronic device comprising:

a power management circuit;

an antenna including a first coil and a second coil;

a transceiver circuit configured to transmit a power signal received from the power management circuit to the antenna and to transmit a power signal received from the antenna to the power management circuit, the transceiver circuit including a first transceiver terminal and a second transceiver terminal;

a switch; and

a control circuit electrically connected to the switch and the transceiver circuit,

wherein a first end of the second coil is connected to the first transceiver terminal,

wherein a second end of the second coil is connected to the second transceiver terminal,

wherein a first end of the first coil is connected to the first transceiver terminal,

wherein a second end of the first coil is connected to the second transceiver terminal through the switch, and

wherein the control circuit is configured to open or close the switch based on identification information of an external electronic device received from the antenna through the transceiver circuit.

20. The electronic device of claim 19 , further comprising:

a housing including:

a first surface directed towards a first direction, and

a second surface directed towards a second direction being opposite to the first direction,

wherein the first coil and the second coil are located inside the housing, and

wherein the second coil is located inside the first coil and facing the second surface.