Summary
International Symposium on Antennas and Propagation
2011
Session Number:FrD4
Session:
Number:FrD4-5
Reading of UHF band passive RFID tags using a reflector
Yuki Oowashi, Shigeki Takeda, Kenichi Kagoshima,
pp.-
Publication Date:2011/10/25
Online ISSN:2188-5079
Summary:
Due to the high cost of tags which are designed for metallic objects, they have not been commonly used compared to the conventional ones. On the other hand, although reading distance becomes short, a recognition technique using a dipole tag is very effective to reduce introduction cost of RFID. In this paper, we have proposed the technique for improving the recognition performance of UHF RFID which is used in close proximity of metallic objects. We have employed a waveguide like square shaped reflector in order to be able to read tags attached any position including the reverse side of a metallic objects which is assumed to be a cylinder. It is clarified that optimum electromagnetic distribution is similar to TM01 mode of a coaxial waveguide and that the validity of this property is evaluated by method of moment based electromagnetic simulation and experiment.