Experimental and Simulation Investigation of RFID Blind Spots

Radio-frequency identification (RFID) blind spots are the regions within the maximum operating range of the RFID system where the RFID reader fails to read the RFID tag. The existence of blind spots have troubled supply chain management and RFID system engineers because any failed or omitted reading of RFID tag would slow down the inventory tracking process. This paper studies the potential locations of blind spots as well as the effectiveness of several blind spots remedy methods such as frequency diversity, spatial diversity, polarization diversity, and antenna beam steering. Using the blind spots creation approach introduced in this paper, the locations of the blind spots can be calculated and visualized. From our simulation results, spatial diversity and polarization diversity are found to be better than all other aforementioned approaches.

[1]  J. L. Leou,et al.  ANTENNA MEASUREMENTS IN THE PRESENCE OF MULTIPATH WAVES , 2001 .

[2]  P.V. Nikitin,et al.  Performance of RFID tags with multiple RF ports , 2007, 2007 IEEE Antennas and Propagation Society International Symposium.

[3]  L. Ukkonen,et al.  Performance of a passive UHF RFID tag in reflective environment , 2008, 2008 IEEE Antennas and Propagation Society International Symposium.

[4]  Nak-Seon Seong,et al.  Polarization and Space Diversity Antenna Using Inverted-F Antennas for RFID Reader Applications , 2006, IEEE Antennas and Wireless Propagation Letters.

[5]  Jiang Tao Huang-Fu,et al.  A miniaturized printed dipole antenna with V-shaped ground For 2.45 GHz RFID readers , 2007 .

[6]  Hsueh-Jyh Li,et al.  Effect of antenna mutual coupling on the UHF passive RFID tag detection , 2008, 2008 IEEE Antennas and Propagation Society International Symposium.

[7]  Shih-Kang Kuo,et al.  AN ACCURATE METHOD FOR IMPEDANCE MEASUREMENT OF RFID TAG ANTENNA , 2008 .

[8]  S.R. Banerjee,et al.  Investigation of spatial and frequency diversity for long range UHF RFID , 2008, 2008 IEEE Antennas and Propagation Society International Symposium.

[9]  Alexei V. Popov,et al.  ELECTROMAGNETIC PULSE PROPAGATION OVER NONUNIFORM EARTH SURFACE: NUMERICAL SIMULATION , 2007 .

[10]  A. Kishk,et al.  Chip Impedance Matching for UHF RFID Tag Antenna Design , 2008 .

[11]  Soon Yim Tan,et al.  LOCALIZATION OF OMNI-DIRECTIONAL MOBILE DEVICE IN MULTIPATH ENVIRONMENTS , 2008 .

[12]  Lixin Ran,et al.  SIGNAL DESCRIPTIONS AND FORMULATIONS FOR LONG RANGE UHF RFID READERS , 2007 .

[13]  C. H. Bianchi,et al.  A channel model for multipath interference on terrestrial line-of-sight digital radio , 1998 .

[14]  Jong-Gwan Yook,et al.  Interference Analysis of UHF RFID Systems , 2008 .

[15]  R. Bansal,et al.  Antenna theory; analysis and design , 1984, Proceedings of the IEEE.