Radio Frequency IDentification (RFID) working, design considerations and modelling of antenna

RFID is the acronym of radio frequency identification. It represents a new automated data-capture technology, based on the extraction of data contained in devices called RFID tags or transponders by wireless radio technologies. In the RFID appellation we find RF. For memory, who says RF says laws of the physics such as, laws of Maxwell and those of Biot and Savart that manage the running of the RFID. Otherwise, the reader and the transponder communicate by using electromagnetic waves that assure the transfer of information and the self alimentation of transponders. For thus, the purpose of this paper is to explain the RFID technology and to survey the determination and evaluation of the parameters of a RFID antenna.