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Impedance matching is a constant topic in the RFID community. However, it still heavily depends on the trial-and-error approach, even for the popular T-match. In this paper, the dynamics behind the impedance matching of T-match-dipole tags are studied systematically. Based on the inductance-based model stemmed from the transmission line model, the bandwidth characteristics of diverse matching scenarios...
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...
This paper is focused on the design of dual-band impedance-matching networks of interest in RF identification (RFID) systems. By cascading an impedance-matching network between the chip and antenna, the performance of the RFID tags can be improved. The main aim of this study is to demonstrate the possibility of designing such networks by means of split-ring resonators coupled to microstrip transmission...
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