Radio Frequency Identification (RFID) technology is a way that objects indentified unique and automatically by Radio Frequency.

RFID mainly occurs with a tag and reader. RFID tags can be programmable to get, keep and send object datas like Electronic Product Codes (EPC). Datas can be automatically saved or changed with the tags on product red by reader

RFID Tags:

There are 3 kinds of tag: passive (ineffective), semi-passive (semi-effective) or active (effective). The cheapest tag type is Passive Tags. They don’t have their own power supply. They can work with reader’s power. Against this, semi- passive tags have a small battery, so they don’t need to get power from incoming signal power. These tags have wide range reading distance, more reliable and can be respond more quicly to reader. Active tags are -unlike other varieties- have their own power supplies which provide to run circuits and producing answer signal. They show high performance with these properties but more expensive than the others.

RFID Frequency:

RFID can be usable at, Low Frequency (LF) 125–134 kHz, High Frequency (HF) 13.56 MHz, Ultra High Frequency (UHF) 860–960 MHz and Super High Frequency (SHF) 5.8 GHz.