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RFID technology is one of the most widely used technologies in the field of wireless communication. It is an application of electromagnetic technology that uses radio waves to transmit data between two points over a short range, thus eliminating the need for physical contact between the tags and the readers. The 13.56 MHz RFID technology is a widely used application field and its working principle is quite simple. The 13.56 MHz RFID system works on a three-component system consisting of the RFID reader, tags and antennas. An RFID tag is a small device containing a unique identifier which is embedded within the antenna. When an RFID reader is activated, it emits radio frequency waves that are picked up by the tags in its vicinity. This signal triggers the tag to transmit its unique identifier, which is then picked up by the RFID reader. The reader then identifies the tag and its associated information. The 13.56 MHz RFID technology is popularly used in the fields of access control, attendance management, automatic vending machines and asset management. In access control systems, RFID tags are used to validate and approve user access. This is commonly used for security purposes or to restrict and limit access to certain areas.RFID tags are also used in attendance management systems. Once an employee enters the office, his identity can be verified with his RFID tag. Data related to time and attendance can then be stored automatically for future reference. RFID tags are also used in automatic vending machines and asset management systems. The RFID tags can be used to track the quantity or type of goods stored within a vending machine. RFID tags can also be attached to products in the warehouse, enabling asset managers to track the movement and quantity of their products.Overall, the 13.56 MHz RFID technology is a reliable application field with a wide range of applications. Its working principle is quite simple and its application is cost-efficient. The technology has been adopted in many different industries and has proven to be an effective means of communication.

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