M. Nikkari, T. Björninen, L. Sydänheimo, L. Ukkonen, and M. Kivikoski (Finland)
RFID, tag antenna, passive, bow tie-tag, metal plate,
substrate, performance evaluation.
In passive ultra-high frequency (UHF) radio frequency
identification (RFID) there is a need for tag antennas that
can be used in the vicinity of metal. In this paper we study
the performance of bow tie type tag antenna in the vicinity
of metal by simulations and measurements, including
detailed signal analysis such as measuring the threshold
power levels and backscatter performance. Effects of
different air gaps and packing materials such as plastic
foam and cardboard are studied.