Bar codes and RFID tags are both item information identification technologies, and their essence is to give a special number to an item, through which you can get information about the item. The bar code is numbered by knowing the change of the image by optical means. The RFID tag can be considered as the electronic version of the barcode, and its working principle is the radio principle. The number information in the RFID tag chip is obtained through the process of electromagnetic wave carrier and modulation. RFID tag category: Low-frequency electronic tags : Its operating frequency range is 30kHz ~ 300kHz. Typical operating frequencies are: 125KHz, 133KHz (There are other frequencies close to it, such as TI uses 134.2KHz). High and medium frequency electronic tags: The working frequency of mid-to-high frequency electronic tags is generally 3MHz ~ 30MHz. Typical operating frequency is 13.56MHz. UHF and microwave tags: Ultra-high freque...
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