Rfid : Radio Frequency Identification

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The term RFID stands for the name Radio Frequency Identification, a technology which use different forms of frequencies to identify different type of items or people. The normal use of RFID is for tags and reader devices.
RFID was invented in Soviet Union in 1945 by inventor Leon Theremin. The main use for RFID during 1945, was to track audio information and sounds to identify if aircrafts was friend or foes of the Soviets in World War II. Once the World War was over, similar technology started to be developed such as IFF transponder, Automatic Identification and Data capture (AIDC), and Passive Reader Active Tag and much more. In modern times, RFID is used in many ways, for example in keep track of good in stores, collecting toll payments without contact, and keep track of bagging at the airport. Have you ever bought an item inside a store and wondering what happens when the cashier scans the barcode? This is RFID’s Active Reader Active Tag at work, it’s a system that use tags to transmit signals and reply once the information is received from the item scanned. In addition, Passive Reader Active Tag (PRAT) is often used in stores as well by overnight stockers and inventory staff. PRAT allows the user to scan barcodes to keep track of inventory in store, as well as order inventory. RFID has increased in applications outside of retail store chains many common ones such as badges need to access building doors, lock on newer vehicles car doors and commutation devices.
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