RFID printer

　　RFID printer

　　RFID technology generally refers to radio frequency identification technology, also known as radio frequency identification. A specific target can be identified by radio signals and related data can be read and written without the need to establish mechanical or optical contact between the identification system and the specific target.

　　RFID is similar to barcode scanning. For barcode technology, it attaches the encoded barcode to the target and uses a special scanning reader to use optical signals to transmit the information from the bar magnetic to the scanning reader; while RFID is Use a special RFID reader and a special RFID tag that can be attached to the target, and use the frequency signal to transmit information from the RFID tag to the RFID reader.

　　The most important advantage of RFID technology is non-contact identification, which can read tags through snow, fog, ice, paint, grime, and harsh environments where barcodes cannot be used, and read tags extremely fast, less than 100 milliseconds in most cases.

　　RFID technology is divided into three frequency bands. RFID products in different frequency bands will have different characteristics. The definition of RFID operating frequencies includes the frequency range of low frequency (LF), high frequency (HF) and ultra-high frequency (UHF). The corresponding representative frequencies are: low frequency below 135KHz, high frequency 13.56MHz, and ultra-high frequency 860M~960MHz.

　　Low frequency characteristics: The working frequency is from 120KHz to 134KHz, and the working frequency of TI is 134.2KHz. The wavelength of this band is about 2500m. Compared with RFID products in other frequency bands, the data transmission rate of this frequency band is relatively slow.

　　High frequency characteristics: The working frequency is 13.56MHz, and the wavelength of this frequency is about 22m. The system has anti-collision properties and can read multiple electronic tags at the same time. Some data information can be written into the tag. The data transfer rate is faster than the low frequency.

　　UHF characteristics: In this frequency band, the definitions are not quite the same worldwide - 868MHz is defined in Europe and parts of Asia, between 902 and 905MHz in North America, and between 950 and 956 in Japan. The wavelength of this frequency band is about 30cm. This band has a good read distance. With a high data transfer rate, a large number of electronic tags can be read in a short time.

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