Radio frequency identification is the abbreviation RFID, that is, identification by radio waves. In RFID system, identification information is stored in electronic data carrier, which is called electronic tag. The basic data stored in the tag is read by the RFID reader / writer. The reader / writer can not only read the stored information, but also write data to the RFID tag manufacturers. In the process of writing and reading, data interaction is conducted by wireless communication.

According to the different RF coupling methods, RFID can be divided into inductive coupling and backscatter coupling.

Inductive coupling principle: the tags in inductive coupling mode are almost passive. They can obtain the electromagnetic wave energy emitted from the reader / writer for communication. Generally, the working distance is relatively short, which is limited by the air interface protocol where they are located.

Backscatter coupling principle: radar technology provides the theoretical and application basis for the backscatter coupling mode of RFID. When the electromagnetic wave encounters a space target (object), part of its energy is absorbed by the target, and the other part is scattered to various directions with different intensities. In the scattered energy, a small part is reflected back to the transmitting antenna and received by the antenna (therefore, the transmitting antenna is also the receiving antenna). The received signal is amplified and processed to obtain the relevant information of the target.

RFID system composition

RFID system is composed of RFID reader, RFID tag and RFID application software.

RFID reader / writer

RFID readers and writers communicate wirelessly with RFID tag manufacturer(more info) through antennas, and can read or write RFID tag manufacturers identification codes and memory data. In practical applications, there are two forms, namely mobile and fixed readers and writers.

Dongji has been deeply engaged in the RFID industry for many years. Its representative customers include SF express, Yuantong express, Yonghui supermarket, Wal Mart, JD, vipshop and other customers. It helps them solve the problems of intelligent inventory, rapid receipt and delivery, inventory and is widely used in manufacturing, logistics, retail and other industries.

OPRFID Technologies' RFID tag manufacturers:

http://www.oprfid.com/