An electronic device is provided. The electronic device includes a housing which forms at least a part of an exterior of the electronic device, an antenna module which is disposed in the housing and includes a first surface facing one surface of the housing and a second surface facing the opposite direction of the first surface, the antenna module including an antenna array disposed on the first surface, a wireless communication circuit electrically connected with the antenna module, an insulation layer which is disposed between the first surface of the antenna module and one surface of the housing, and first pads which are disposed in a first area of the insulation layer that corresponds to the first surface of the antenna module, wherein each of the first pads has a first shape in which at least a part of an area overlapping the antenna array is removed, and wherein the wireless communication circuit feeds power to the antenna array, thereby transmitting and/or receiving a signal of a designated frequency band.