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An UHF RFID(radio frequency identification) reader is implemented to meet the needs of data acquisition in the IOT(internet of things). Firstly, this paper introduced the principle of the reader. The RF front-end circuit was taken as the focal point,and it was simulated with ADS. AS3992 and its peripheral circuit implemented the transceiving of RF signals, STM32 completed the process and control of...
This paper proposed a complete solution of UHF RFID reader system based on S3C2440 microprocessor and AS3992 UHF Reader chip. By designing the automatic gain control(AGC) circuit and the antenna impedance automatic matching circuit, the transmit power is up to 33dBm and the receiver SNR is improved at the same time. The reader system is transplanted into the embedded Linux OS which greatly facilitates...
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