A method of manufacturing a package structure is provided with the following steps, providing a first die, a second die and a third die; forming a first redistribution layer located on and electrically coupled to the first die, the second die and the third die; and forming an antenna located on and electrically coupled to the first die, the second die and the third die, wherein a distance of an electrical connection path between the first die and the antenna is smaller than or equal to a distance of an electrical connection path between the second die and the antenna and a distance of an electrical connection path between the third die and the antenna.