An electronic device includes: at least one processor, wireless communication circuitry coupled to the at least one processor, and an antenna module coupled to the wireless communication circuitry. The antenna module includes a circuit board on which a first radiator array for a first frequency band, a second radiator array for a second frequency band higher than the first frequency band, and a third radiator array for a third frequency band lower than the first frequency band are disposed. The first radiator array includes patch radiators having a first size, disposed on a first layer among a plurality of layers of the circuit board. The second radiator array includes patch radiators having a second size smaller than the first size, disposed on a second layer above the first layer with respect to a side of the circuit board among the plurality of layers of the circuit board.