How does RFID technology work?

RFID stands for Radio-Frequency Identification, i.e. identification using radio waves. This technology uses small electronic devices consisting of a microchip and an antenna to transmit information wirelessly over short distances. An RFID system consists of a tag, a reader and often a host system that processes the data. The RFID tag contains a stored data set. When the tag comes within range of an RFID reader, it is activated by the radio frequency signal emitted by that device. The tag uses the energy of the incoming signal to send its stored response signal, which is then picked up by the reader. This information is often used to identify or track the object to which the tag is attached. There are two main types of RFID tags: passive and active. Passive tags do not require their own power supply system, but draw their energy from the signal emitted by the reading devices. Active tags, on the other hand, have their own power source, which gives them greater range and storage capacity, but also influences their size, cost and lifespan. This technique is widely used in various areas, from logistics to access control to timing systems in sporting events.