Title :
A novel antenna achieving null-less magnetic field distribution for near-field UHF RFID
Author :
Laiwei Shen ; Wanchun Tang ; Huiling Xiang ; Wei Zhuang
Author_Institution :
Nanjing Univ. of Sci. & Technol., Nanjing, China
Abstract :
In this paper, an antenna which can generate large, strong, and uniform magnetic field distribution is proposed for the near field magnetic coupling UHF RFID system. The antenna is composed of two elements and a feeding network. By feeding the two elements at different phases, their dead zones can be compensated by each other. Consequently, a uniform magnetic field distribution is achieved, which will be helpful in designing item level RFID system. And the perimeter of the interrogation zone is up to 5.4λ at 920MHz.
Keywords :
UHF antennas; antenna feeds; magnetic fields; near-field communication; radiofrequency identification; antenna; dead zones; feeding network; frequency 920 MHz; interrogation zone; magnetic coupling; magnetic field distribution; near field UHF RFID system; radiofrequency identification; Antenna feeds; Couplings; Magnetic fields; Radiofrequency identification; UHF antennas; Near-field RFID; UHF; Uniform magnetic field distribution;
Conference_Titel :
Antennas and Propagation (ISAP), 2014 International Symposium on
Conference_Location :
Kaohsiung
DOI :
10.1109/ISANP.2014.7026768
