RFID Transponders

adio frequency identification (RFID) or auto-identification (ID) is a contactless data transmission and reception technique between the data carrying device, called a transmitter responder (transponder) or an RFID tag, and an interrogator, which is also known as an RFID reader. A more abstract approach to defining Auto-ID reveals that Auto-ID involves the automated extraction of the identity of an object 1], 2]. The contactless ID system relies on data transmission via radio frequency electromagnetic (EM) signals, and consequently, the whole operation is line-of-sight and weather independent 3]. These advantages overcome the limitations of optical barcodes, which are line-of-sight and weather dependent and need manual operation.