How are RFID tags made?
Radio-frequency identification (RFID) comes in numerous forms, frequencies and configurations, but all tags have a few elements in common. They are used chiefly for identification of objects, but also for tracking objects.AntennaEvery tag has some form of antenna, usually copper. You typically see these in a square coil or squiggle shape in a label or security strip. Hidden antennas (the kind in implantable chips, rugged encased tags and so on) take numerous other forms.Battery or PowerAll tags require some power to transmit information to an RFID reader. An active tag includes a small battery. A passive tag takes its power from the RFID reader (akin to a bar code scanner). Passive tags are less expensive and longer lasting but typically not as powerful as active tags.DiodeRFID requires direct-current (DC) power, so tags contain diodes which convert alternating current (AC) to DC.InlayAll of the above elements, and a wafer that holds the tag information, are combined into what is calle
