RFID chip is the core component of the radio frequency identification system, responsible for storing information and communicating wirelessly with the RFID reader. It is widely used in logistics, retail, medical, manufacturing and other industries to achieve efficient identification and management of items.
The working principle of RFID chip is based on electromagnetic field signal transmission: when the tag enters the electromagnetic field range emitted by the RFID reader, the chip will obtain energy from the reader to be activated, and transmit the data back through the built-in antenna. The antenna plays a dual role of receiving and transmitting in the whole process - it not only receives signals from the reader to power the chip, but also encodes the information stored in the chip and returns it to the reader.
This process is called backscatter modulation, which enables the reader to identify multiple tags at the same time without visual or scanning one by one, greatly improving the efficiency of data collection.
RFID chips can not only read, but also support information writing, which means that the data in the tag can be dynamically updated during the life cycle. For example, information such as the storage status, transportation route, and test results of the goods can be written into the chip in real time. Some high-performance chips also have password protection, anti-tampering alarms, and the ability to integrate with sensors such as temperature, humidity, and vibration, which are suitable for more complex IoT scenarios.
The performance of RFID chips is affected by many factors, such as storage capacity, reading distance, operating frequency and transmission rate. Different applications have different requirements for these parameters. For example, retail checkout counters pay more attention to fast tag reading, while warehouse logistics systems pay more attention to reading distance and anti-interference ability.
RFID chips give physical items a digital identity, making the entire process from raw materials to finished products, from warehouses to end users, visual, traceable and manageable.
