Title :
Shape Optimization of Double Antenna for Long Range Passive UHF-Band RFID
Author :
Watanabe, Yoshihiro ; Watanabe, K. ; Igarashi, H.
Author_Institution :
Grad. Sch. of Inf. Sci. & Technol., Hokkaido Univ., Sapporo, Japan
Abstract :
The passive RFID tag, which receives energy for its operation from electromagnetic waves radiated by RFID readers, changes the antenna impedance to modulate the back scattering waves caught by the reader. For this reason, during the back-scattering communication, the energy received by the RFID tag much reduces due to the impedance mismatch. To resolve this problem, the double antenna system which consists of receiving and sending antennas has been proposed. In this paper, the double antenna shapes are optimized on the basis of FDTD analysis and genetic algorithm to maximize the communication distance.
Keywords :
UHF antennas; electromagnetic wave scattering; finite difference time-domain analysis; genetic algorithms; impedance matching; radiofrequency identification; receiving antennas; transmitting antennas; FDTD analysis; RFID readers; antenna impedance; back scattering waves; back-scattering communication; communication distance; double antenna shapes; double antenna system; electromagnetic waves; genetic algorithm; impedance mismatch; long range passive UHF-BAND RFID; passive RFID tag; receiving antennas; sending antennas; shape optimization; FDTD; MNA; passive UHF-band RFID; shape optimization;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2013.2241752
