What is This?
The RF tags (Radio Frequency Tangs) primarily work on radio frequencies to act as an anti-shoplifting device. As we know that Radio or Wireless is a way of transmitting energy or any information in a space without using any wire. The energy is carried by electromagnetic waves those move at the speed of light.
Now, imagine that you have been assigned to design an anti-shoplifting gadget that uses radio frequencies for object detection. You could build a small kind of RADAR, sit it by the shopping store door, and point it at people passing by. Radio waves would emit from your transmitter, reflect off people walking through the door, and then reflect your receiver unit. But here is a problem; this would not represent anything useful for shoplifting. You would not know whether people were shoplifting or not because in both cases radio waves reflect you. So, how to differentiate these two cases for the receiver. Here radio frequency tags play their role. As well as having a radio transmitter and receiver at the shopping store doorway, every object or item of the store contains a hidden RF tag.