RFID (Radio Frequency Identification) tags are small electronic devices that contain a chip and an antenna. These tags transmit data wirelessly to a reader by using radio waves. The way RFID tags work is quite simple.

When a signal is sent from the RFID reader, the RFID tag responds by transmitting its unique ID number back to the reader. The reader then uses this ID number to fetch data from a database or perform a specific action.

The RFID tag's antenna captures energy from the radio wave sent by the reader. This energy powers the tag's microchip, which then sends data back to the reader using the antenna. This process is known as electromagnetic coupling.

RFID tags can be either passive or active. Passive tags don't have an internal power source and rely solely on the energy sent by the reader. Active tags, on the other hand, contain their own power source and transmit data constantly, rather than waiting for a signal from the reader.

RFID technology is used in many different applications, such as inventory management, access control, and tracking assets. Because RFID tags can store and transmit large amounts of data, they are ideal for use in situations where a lot of information needs to be collected, such as inventory tracking in a warehouse.

Overall, RFID technology is a powerful tool for businesses and organizations that need to collect and manage data efficiently. Its reliability and versatility have made it a popular choice for a wide range of applications.