A foldable electronic device according to an embodiment may include: a first antenna included in a first housing of the electronic device and configured to transmit or receive signals associated with
network communication; a second antenna included in a second housing of the electronic device and configured to transmit or receive signals associated with
network communication; at least one
RFIC electrically connected to each of the first antenna and the second antenna; a memory for storing instructions; and at least one processor connected to the memory and the at least one
RFIC. The instructions, when executed by the at least one processor, may cause the electronic device to: identify a first received
signal strength corresponding to the first antenna and a second received
signal strength corresponding to the second antenna. The instructions, when executed by the at least one processor, may cause the electronic device to: determine whether a value of a first parameter identified based on the first received
signal strength and the second received
signal strength is less than a threshold. The instructions, when executed by the at least one processor, may cause the electronic device to: determine whether the electronic device is in a folded state. The instructions, when executed by the at least one processor, may cause the electronic device to: based on determining that the value of the first parameter is less than the threshold and the electronic device is in a folded state, be configured to transmit a signal by using the first antenna and the second antenna. The instructions, when executed by the at least one processor, may cause the electronic device to: control the at least one
RFIC to transmit signals of the same phase via the first antenna and the second antenna.