The full form of RFID is radio frequency identification. It is very common name for the technologies where radio waves are used. This is useful for automatic identification of individuals or items. Usually a serial number is used against a person or thing while storing and retrieving necessary information.
The chip is enabled by the antenna for sending information through the radio waves. If you want to know more about the topic, it is suggested to search for the RFID chip timing Salt Lake City Utah on the Internet for more information.