Electronic device and method for switching antenna thereof

An electronic device comprising:

• a foldable housing comprising
• a hinge structure,
• a first housing structure connected to the hinge structure and comprising a first surface facing a first direction, a second surface facing a second direction opposite the first surface, and a first lateral member surrounding a first space between the first surface and the second surface, and
• a second housing structure connected to the hinge structure and comprising a third surface facing a third direction, a fourth surface facing a fourth direction opposite the third direction, and a second lateral member surrounding a second space between the third surface and the fourth surface, the second housing structure being folded relative to the first housing structure around the hinge structure,
• wherein the foldable housing is configured such that the third direction is opposite the first direction in a folded state and so that the third direction is the same as the first direction in an unfolded state;
• a wireless communication circuit;
• a first antenna configured to transmit and receive a first signal in a first frequency band and disposed on a first part of the first lateral member;
• a second antenna configured to transmit and receive a second signal in a second frequency band different from the first frequency band and disposed on a second part of the first lateral member;
• a third antenna configured to transmit and receive a third signal in the first frequency band and disposed on a third part of the second lateral member;
• a fourth antenna configured to transmit and receive a fourth signal in the second frequency band and disposed on a fourth part of the second lateral member;
• a switch configured to electrically connect at least one of the first antenna, the second antenna, the third antenna, and the fourth antenna to the wireless communication circuit;
• a sensor configured to detect an external object that comes into contact with or approaches the electronic device;
• and
• a processor, wherein the processor is configured to:
• select an antenna to output a signal from at least one of the first, second, third, or fourth signals transmitted from the wireless communication circuit, based on a frequency band of the signal, a state of the foldable housing, and/or detecting contact or an approach of the external object by the sensor;
• and
• control the switch so that the wireless communication circuit and the antenna selected are electrically connected.