An impingement cooling system for cooling electronic components includes a nozzle array having a plurality of nozzles in fluid communication with a source of cooling fluid, each nozzle including a deflection structure that deforms above a threshold temperature. The lifting mechanism includes a lifter pin configured to support and move up and down the target substrate, and a guide hole configured to guide the lifter pin being moved up and down. Thus, with only one planar inverted F antenna, a multi-band function is performed, and frequency characteristics of a portable computer are improved, since to connect the antenna cable to an end of a planar inverted F antenna enables a frequency band to be broadened, compared with a conventional connection.