Chip Impedance Matching for Uhf Rfid Tag Antenna Design

  title={Chip Impedance Matching for Uhf Rfid Tag Antenna Design},
  author={C. Loo and Khaled Elmahgoub and Fan Yang and Atef Z. Elsherbeni and Darko Kajfez and A. Kishk and Tamer Elsherbeni and Leena Ukkonen and Lauri Syd{\"a}nheimo and M. Kivikoski and Sari Merilampi and Pekka Ruuskanen},
Passive UHF RFID tag consists of a microchip attached directly to an antenna. Proper impedance match between the antenna and the chip is crucial in RFID tag design. It directly influences RFID system performance characteristics such as the range of a tag. It is known that an RFID microchip is a nonlinear load whose complex impedance in each state varies with the frequency and the input power. This paper illustrates a proper calculation of the tag power reflection coefficient for maximum power… CONTINUE READING
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