RFID system works and its structure (Figure)

RFID system works and its structure (Figure)

RFID system works and its structure (Figure)
A complete RFID system consists of a reader (Reader) and an electronic tag (TAG), the so-called transponder (Transponder) and the application software system, which works by means of a specific frequency Radio wave energy to the Transponder, used to drive the Transponder circuit will send the internal data, then Reader will receive the interpretation of data in order to give the application to do the appropriate treatment.


Figure 1. The basic composition of the FLID system

    RFID card reader and electronic tags between the communication and energy sensing approach can be roughly divided into, inductive coupling (Inductive Coupling) and backscatter coupling (Backscatter Coupling) two, most of the general use of low-frequency RFID Type, and most of the higher frequency of the second way.



Figure 2. Communication and energy sensing between the RF reader and the RFID tag

     The reader can be read or read / write devices depending on the structure and technology used, and is the RFID system information control and processing center. The reader is usually composed of a coupling module, a transceiver module, a control module and an interface unit. Readers and transponders generally use half-duplex communication for information exchange, while the reader through the coupling to the passive transponder to provide energy and timing. In the practical application, can be further through Ethernet or WLAN to achieve the object identification information collection, processing and remote transmission and other management functions. Responder is the RFID system information carrier, the current transponder is mostly by the coupling of the original (coil, microstrip antenna, etc.) and microchip

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