RFID
From Mobileradicals
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What is RFID ?
Radio Frequency IDentification (RFID) tags, a simple microchip and antenna, interact with radio waves from a receiver to transfer the information held on the microchip. These RFID tags are classified as either active or passive, with active RFID tags having their own transmitter and associated power supply. Passive RFID tags do not have their own transmitter; they reflect energy from the radio wave sent from the reader. Active RFID tags can be read from a range of 20 to 100m, whilst passive RFID tags range from a few centimetres to around 5m (dependent on operating frequency range).
