An electronic device includes a communication circuit, a plurality of antennas that are fed with power from the communication circuit, and a processor that controls the communication circuit. The processor is configured to receive a first signal for indicating initiation of configuration for carrier aggregation. The processor is also configured to change the configuration of at least one of the antennas or the communication circuit to perform the carrier aggregation if a second signal for indicating operation initiation of the carrier aggregation is received from a base station.