Electronic device and method for performing impedance matching according to activation of antennas

A method of an electronic device, the method comprising:

• identifying a distance between a first antenna and a second antenna supporting communication between the electronic device and external electronic device;
• activating, in a first state where the distance is lower than a preset threshold, a first impedance matching circuit of the first antenna and a second impedance matching circuit of the second antenna, based on a preset phase and a first impedance;
• and
• selectively activating, in a second state where the distance is greater than the preset threshold, one of the first impedance matching circuit and the second impedance matching circuit based on a second impedance different from the first impedance.

An electronic device comprising:

• a sensor;
• a first antenna;
• a first impedance matching circuit corresponding to the first antenna;
• a second antenna;
• a second impedance matching circuit corresponding to the second antenna;
• a switch connected to the first impedance matching circuit and the second impedance matching circuit;
• and
• a processor controlling the switch based on the sensor,
• wherein the processor is configured to:
• activate, in a first state that both the first antenna and second antenna are activated, both the first impedance matching circuit and the second impedance matching circuit based on a preset phase and a first impedance by controlling the switch;
• and
• switch, in response to identification of an external object in contact with the electronic device by using the sensor in the first state, from the first state to a second state that an impedance of one of the first impedance matching circuit or the second impedance matching circuit is adjusted to a second impedance different from the first impedance by controlling the switch.