Radio-Frequency Identification: RFID Tags

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Radio-frequency identification also known as RFID is the use of wireless technology that uses electromagnetic fields to transfer data, for the purpose of automatically identifying and tracking RFID tags that are attached to objects. The RFID tags will have information that is electronically stored. Some of the tags will be powered by an electromagnetic induction from magnetic fields that are produced near the readers. Certain RFID tags will collect energy from the reader’s radio waves and will respond like a passive responder. Different types of RFID tags will have batteries built into them and which will power the tags. Many of the RFID tags that have batteries built into them can function at hundreds of meters from the reader. RFID tags will operate differently from a standard barcode because it does not have to be within a direct line of sight from the reader. The usage of RFID tags are implemented in several different service applications such as Pharmaceuticals, automobile productions, animals and features other ways to be used by different types of readers.
What could be considered the first RFID tag was invented by Mario Cardullo and was patented on January 23, 1973. His invention was a passive radio transponder with built-in memory. It was able to receive its power from the
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Passive tags are small and can be produced in large quantities at low cost, and do not require a battery to power them. Active tags are equipped with a battery, can transmit the signal from a farther distance, they have a limited life span because of the use of a battery and has a beacon that transmits on a periodic basis. Semi-active tags uses a built-in battery to power the circuit only when a reader first energizes the tag. Chipless tags use fibers or materials that reflect a portion of the reader’s signal

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