In an embodiment, an electronic device may include a housing having an inner space and an antenna structure disposed in the inner space of the housing. The antenna structure may include a printed circuit board (PCB) and at least one antenna disposed in the PCB. The PCB may have a plurality of insulating layers and a ground layer. The at least one antenna may include a conductive line disposed on a first insulating layer among the plurality of insulating layers, a conductive via extended from the conductive line in a first direction, and at least one conductive pattern branched at a right angle from the conductive line on the first insulating layer. The wireless communication circuit may be configured to transmit and/or receive a radio signal in a range of about 3 GHz to about 100 GHz through the at least one antenna.