Chip-less radio frequency identification systems using metamaterials and identification methods thereof

A chip-less radio frequency identification (RFID) system using metamaterial, the system comprising:

• a tag that includes the metamaterial, the metamaterial corresponding to an identification (ID) of the tag;
• a reader that transmits a first electromagnetic wave to the tag and that recognizes the tag ID by analyzing a frequency spectrum of a second electromagnetic wave received from the tag as a result of a response of the metamaterial to the first electromagnetic wave;
• a computer that stores the tag ID received from the reader and that transmits the tag ID via a network;
• and
• a server to receive the tag ID via the network.

An identification method of chip-less radio frequency identification (RFID) systems using metamaterial, the identification method comprising:

• creating a tag that includes the metamaterial, the metamaterial having different resonance frequencies;
• changing a frequency of a first electromagnetic wave to be transmitted to the tag by a reader;
• and
• analyzing a frequency spectrum of a second electromagnetic wave from the tag that corresponds to the first electromagnetic wave.