Title :
A novel antenna with a feed networks for RFID reader at ultra high frequency
Author :
Yi, Min ; Li, ShuFang ; Liu, Hongjie ; Hong, Weijun
Author_Institution :
Key Lab. of Universal Wireless Commun., Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
The antenna and feed networks are presented for reader applications of radio frequency identification at ultra high frequency of 840 MHz - 845 MHz and 920 MHz - 925 MHz that is allocated for RFID use in China. The antenna is composed of two dual-L antennas orthogonally placed on a ground plane. The feed networks which are used to attain circular polarization characteristics of the antenna are introduced to control horizontal and vertical radiation current flows for each dual-L antenna respectively. The antenna can also be applied to ultra high frequency of 860 MHz - 960 MHz that is proposed for RFID use by ISO/IEC. The simulation and measurement were performed and the desired frequency bands with a return loss less than -10 dB were achieved.
Keywords :
UHF antennas; antenna feeds; antenna radiation patterns; electromagnetic wave polarisation; loop antennas; multifrequency antennas; radiofrequency identification; ISO/IEC standard; RFID reader; antenna feed network; circular polarization characteristics; dual frequency band operation; dual-L antenna; frequency 840 MHz to 960 MHz; ground plane; radiation current flow; radiofrequency identification; ultra high frequency antenna; Antenna feeds; Antenna measurements; Frequency measurement; IEC; ISO; Loss measurement; Polarization; Radio spectrum management; Radiofrequency identification; UHF antennas; circular polarization; dual-L antenna; planar inverted “F” antenna (PIFA); radio-frequency identification (RFID); the finite-difference time-domain (FDTD); ultra high frequency (UHF);
Conference_Titel :
Communication Systems, 2008. ICCS 2008. 11th IEEE Singapore International Conference on
Conference_Location :
Guangzhou
Print_ISBN :
978-1-4244-2423-8
Electronic_ISBN :
978-1-4244-2424-5
DOI :
10.1109/ICCS.2008.4737295
