A semiconductor package includes a substrate, an electronic component, a dielectric layer a transmitting antenna, a receiving antenna and a FSS (Frequency selective surface) antenna. The electronic component is disposed on and electrically connected with the substrate. The dielectric layer has a dielectric upper surface. The transmitting antenna and the receiving antenna are formed adjacent to the substrate. The FSS antenna is formed adjacent to the dielectric upper surface of the dielectric layer. The FSS antenna is separated from the substrate by the dielectric layer in a wireless signal emitting direction.