Electronic device including antenna and operating method thereof

1. An electronic device comprising:

a hinge module;

a first housing at least partially coupled to a first side of the hinge module and comprising a first antenna;

a second housing at least partially coupled to a second side of the hinge module, the second housing configured to be foldable and unfoldable with the first housing by using the hinge module, and comprising a second antenna;

a sensor circuit configured to detect at least one of an unfolding state or a folding state of the first housing and the second housing;

a memory;

a processor operatively connected to the first antenna, the second antenna, the sensor circuit, and the memory;

a first signal line configured to connect the processor and the first antenna;

a tuner circuit;

a second signal line configured to connect the processor and the second antenna;

a third signal line; and

a divider,

wherein the processor is configured to:

transmit a signal to the second antenna through the second signal line,

based on the detection of the folding state using the sensor circuit, receive the signal transmitted to the second antenna as a feedback signal through the third signal line,

detect a phase of the feedback signal,

determine a time constant of the tuner circuit disposed on the first signal line, based on the detected phase of the feedback signal,

adjust a phase of the first antenna based on the determined time constant of the tuner circuit, and

in case that the tuner circuit comprises a phase shifter disposed between the processor and the first antenna and the second antenna, wherein the processor is configured to change, based on a control value of the phase shifter stored in the memory, a phase of a first signal and transmitted to the first antenna and a phase of a second signal transmitted to the second antenna distributed by the divider.

2. The electronic device of claim 1 , wherein the processor is further configured to:

based on the detection of the folding state using the sensor circuit, identify an antenna having a low performance among the first antenna and the second antenna;

determine whether a transmitting critical situation is identified, based on an electric field condition; and

in case that the transmitting critical situation is identified, apply a transmission weight to the antenna having low performance among the first antenna and the second antenna to control the antenna having low performance to operate with an impedance dominant for transmission, and control the antenna other than the antenna having low performance to operate with an impedance dominant for reception.

3. The electronic device of claim 2 , wherein the processor is further configured to:

in case that the transmitting critical situation is not identified, determine whether a receiving critical situation is identified, based on the electric field condition; and

in case that the receiving critical situation is identified, apply a reception weight to the antenna having low performance among the first antenna and the second antenna to control the antenna having low performance to operate with the impedance dominant for reception, and control the antenna other than the antenna having low performance to operate with the impedance dominant for transmission.

4. The electronic device of claim 3 , wherein the processor is further configured to:

in case that a transmitting and receiving critical situation is identified, based on the electric field condition, apply the reception weight to the antenna having low performance among the first antenna and the second antenna to control the antenna having low performance to operate with the impedance dominant for reception, and control the antenna other than the antenna having low performance to operate with the impedance dominant for transmission.

5. The electronic device of claim 2 , wherein the electric field condition comprises at least one of automatic gain control (AGC) or signal to noise ratio (SNR).

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

a power divider configured to distribute power to each of the first antenna and the second antenna,

wherein the processor is further configured to:

based on the detection of the folding state using the sensor circuit, identify power supplied to each of the first antenna and the second antenna through the power divider,

in case that the power supplied to each of the first antenna and the second antenna through the power divider is different, identify that a performance imbalance between the first antenna and the second antenna has occurred, and

perform a first power back-off with respect to the first antenna and perform, with respect to the second antenna, a second power back-off different from the first power back-off.

7. The electronic device of claim 6 , wherein the sensor circuit comprises:

a first grip sensor electrically connected to the first antenna; and

a second grip sensor electrically connected to the second antenna.

8. The electronic device of claim 7 , wherein the processor is further configured to detect a contact of an external object with respect to the electronic device through the first grip sensor and the second grip sensor.

9. The electronic device of claim 8 , wherein the processor is further configured to:

detect the contact of the external object with respect to the electronic device;

identify a surface in contact with the external object among a plurality of surfaces configuring an outside of the electronic device, based on the performance imbalance between the first antenna and the second antenna being identified to have occurred;

perform the first power back-off with respect to an antenna formed on one side surface of the surface in contact with the external object among the first antenna and the second antenna; and

perform, with respect to another antenna, a third power back-off smaller than the second power back-off.

10. A method of operating an electronic device comprising a hinge module; a first housing at least partially coupled to a first side of the hinge module and comprising a first antenna; a second housing at least partially coupled to a second side of the hinge module, the second housing configured to be foldable and unfoldable with the first housing by using the hinge module, and comprising a second antenna; a sensor circuit configured to detect at least one of an unfolding state or a folding state of the first housing and the second housing; a memory; a processor operatively connected to the first antenna, the second antenna, the sensor circuit, and the memory; a first signal line configured to connect the processor and the first antenna; a tuner circuit; a second signal line configured to connect the processor and the second antenna; a third signal line; and a divider, the method comprising:

transmitting a signal to the second antenna through the second signal line;

based on the detection of the folding state using a sensor circuit, receiving the signal transmitted to the second antenna as a feedback signal through the third signal line;

detecting a phase of the feedback signal;

determining a time constant of the tuner circuit disposed on a first signal line based on the detected phase of the feedback signal; and

adjusting a phase of the first antenna based on the determined time constant of the tuner circuit,

wherein the tuner circuit is configured with a phase shifter disposed between the processor and the first antenna and the second antenna, and

wherein the method further comprises changing, based on a control value of the phase shifter stored in the memory, a phase of a first signal and transmitted to the first antenna and a phase of a second signal transmitted to the second antenna distributed by the divider.

11. The method of claim 10 , further comprising:

based on the detection of the folding state using the sensor circuit, identifying an antenna having low performance among the first antenna and the second antenna;

determining whether a transmitting critical situation is identified, based on an electric field condition; and

based on the determining of the transmitting critical situation being identified, applying a transmission weight to the antenna having low performance among the first antenna and the second antenna to control the antenna having low performance to operate with an impedance dominant for transmission, and control the antenna other than the antenna having low performance to operate with an impedance dominant for reception.

12. The method of claim 11 , further comprising:

based on the determining of the transmitting critical situation not being identified, determining whether a receiving critical situation is identified, based on the electric field condition; and

based on the receiving critical situation being identified, applying a reception weight to the antenna having a low performance among the first antenna and the second antenna to control the antenna having low performance to operate with the impedance dominant for reception, and control the antenna other than the antenna having low performance to operate with the impedance dominant for transmission.

13. The method of claim 12 , further comprising:

based on a transmitting and receiving critical situation being identified, based on the electric field condition, applying the reception weight to the antenna having low performance among the first antenna and the second antenna to control the antenna having low performance to operate with the impedance dominant for reception, and control the antenna other than the antenna having low performance to operate with the impedance dominant for transmission.

14. The method of claim 11 , wherein the electric field condition comprises at least one of automatic gain control (AGC) or signal to noise ratio (SNR).

15. The method of claim 10 , further comprising:

based on the detection of the folding state using the sensor circuit, identifying power supplied to each of the first antenna and the second antenna through a power divider;

based on the power supplied to each of the first antenna and the second antenna through the power divider being different, identifying that a performance imbalance between the first antenna and the second antenna has occurred; and

performing a first power back-off with respect to the first antenna and performing, with respect to the second antenna, a second power back-off different from the first power back-off.

16. The method of claim 15 , further comprising:

detecting a contact of an external object with respect to the electronic device through a first grip sensor electrically connected to the first antenna, and a second grip sensor electrically connected to the second antenna.

17. The method of claim 16 , further comprising:

after detecting the contact of the external object with respect to the electronic device, identifying a surface in contact with the external object among a plurality of surfaces configuring an outside of the electronic device, based on the performance imbalance between the first antenna and the second antenna being identified to have occurred;

performing the first power back-off with respect to an antenna formed on one side surface of the surface in contact with the external object among the first antenna and the second antenna; and

performing, with respect to another antenna, a third power back-off smaller than the second power back-off.