rfid technology

RFID (English: Radio Frequency Identification) or Radio Frequency Identification is a method of identification by using the means of the so-called RFID tag or transponder to store and retrieve data remotely. Labels or RFID cards is an object that can be installed or included in a product, animal or even human beings for the purpose of identification using radio waves. RFID label consists of silicon microchip and antenna. Passive labels do not require a power source, whereas active labels require a power source to function.

RFID history

In 1946, Léon Theremin discovered spying devices for the Soviet government that can emit radio waves again with the voice information. Sound waves vibrate a diaphragm (diaphragm) which change slightly the form of resonator, which then modulates the reflected radio frequency. Although this tool is a listening device spy passive and not a card / label identity, this tool is recognized as the first object and one of ancestors RFID technology. Some publications state that the use of RFID technology has existed since the early 1920s, while some other sources state that the new RFID system emerged in the late 1960s.

A more similar technology, the IFF transponder, was found by the British in 1939, and regularly used by Allied troops in World War II fighter aircraft to identify friend or foe. Such transponders are still used by the military and airlines today........