ELECTRONIC DEVICE COMPRISING PLURALITY OF ANTENNAS AND METHOD FOR OPERATING SAME

An electronic device includes a first antenna, a second antenna, a first power amplifier electrically connected to the first antenna, a second power amplifier electrically connected to the second antenna, a first attenuator electrically connected to the first antenna and the first power amplifier, a second attenuator electrically connected to the second antenna and the second power amplifier, a memory that stores a first threshold value, and a processor operatively connected to the first attenuator and the second attenuator. The processor is configured to perform beamforming by using the first antenna and the second antenna, increase input values of the first power amplifier and the second power amplifier when performance of a beamforming signal deteriorates, measure output values of the first power amplifier and the second power amplifier with respect to the increased input values, and operate at least one of the first attenuator or the second attenuator electrically connected to a deteriorated power amplifier when performance of at least one of the first power amplifier and the second power amplifier is deteriorated based on a measurement result.In addition, it is possible to implement various embodiment understood through the disclosure.