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What is RFID
Dec 19, 2018

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 RFID (Radio Frequency Identification), also known as radio frequency identification, is a communication technology that uses radio signals to identify specific targets and read and write related data without the need to identify mechanical or optical contact between the system and a particular target.

When an item with an RFID electronic tag passes through the reader, the electronic tag is activated by the reader, and the information carried in the tag is transmitted to the reader and the computer system through radio waves, and the automatic collection of information is completed, and the computer application is completed. The system performs corresponding information control and processing as needed.

RFID classification

There are many ways to classify RFID. It can be classified into working frequency classification, classified according to power supply mode, classified according to application range, and classified according to data reading and writing type.

RFID standard

RFID technology and standards development agencies include the US EPC Global, the International Organization for Standardization ISO/IEC18000, and the Japanese Ubiquitous ID. These three standards are not compatible with each other. The main differences are in the three aspects of communication methods, anti-collision protocols and data formats. The technical gap is not obvious.

Among them, EPC global has developed the EPC (Electronic Product Code) standard, using the UHF band. ISO has developed ISO14443A/B, ISO15693 and ISO18000 standards, the first two using 13.56MHz and the latter using 860~930MHz. Products in the UHF band between 860 and 960 MHz are the most popular because of their long working distance and the most likely to be the global frequency band.

Different standards will result in reduced interoperability between RFID readers and tags, affecting accuracy and making it difficult to apply uniformly.

China has fully recognized the importance of the RFID industry. In 2012, it officially released GB/T28925-2012 "Information Technology Radio Frequency Identification 2.45GHz Air Interface Protocol" and GB/T28926-2012 "Information Technology Radio Frequency Identification 2.45GHz Air Interface Compliance Test" Method" and other two independent innovation RFID national standards. In 2013, the national standard GB/T 29768-2013 "Information Technology Radio Frequency Identification 800/900MHz Air Interface Protocol" was officially released.