According to various embodiments, an electronic device comprises: a first plate; a second plate facing the opposite direction of the first plate; a housing including a lateral member for encompassing the space between the first plate and the second plate; and an antenna structure, wherein the antenna structure includes: a plurality of insulating layers arranged in a stacked manner so as to be parallel to the first plate; a loop antenna array formed by the insulating layers and/or by the peripheries of the insulating layers; and a wireless communication circuit electrically connected to loop antennas, and configured to transmit and receive a first signal having a first frequency of a range of 3 GHz to 100 GHz.