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Radio-Frequency Identification Essay

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Submitted By darrin1027
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R.F.I.D. (Radio-Frequency Identification)

RFID is the wireless non-contact use of radio-frequency electromagnet fields to transfer data. RFID tags are used in many industries to enter or exit buildings as well as buy certain things (mostly use in the government). It can also be attached to cash, clothing, and everyday possessions (such as cell phone, Laptops, desktop computers, tablets, etc.).

Let me give you some history about where this technology came from In 1945 Leon Theremin invented an espionage or spying tool for the Soviet Union which retransmitted incident radio waves with audio information. Sound waves vibrated a diaphragm, which slightly altered the shape of the resonator that modulated the reflection radio frequency. So basically Leon Theremin created the processor for the RFID technology because it is being energized and activated by waves from an outside source.

RFID uses signaling between the reader and tag is done in several different incompatible ways its all depending upon the frequency band being used. Tags operate on LF and HF bands, which use small radio waves to transmit signals. In the near electromagnetic field region the tag is closely combined electronically with the transmitter in the reader. The tag can increase the electromagnetic field created by the reader by changing the electrical loading. By changing the relative loads higher or lower the tag produces a change that the reader can detect.

RFID is probably the most unknown thing because we use it everyday but never know what’s it called and how it works to be honest I didn’t realize what it was until you gave me this technology essay, I also talked with a brother from my church that help describe what is was.

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