A novel antenna with a feed networks for RFID reader at ultra high frequency
Guangzhou（2008）
摘要
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.
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关键词
radiation current flow,planar inverted "f" antenna (pifa),ultra high frequency (uhf),ultra high frequency antenna,multifrequency antennas,frequency 840 mhz to 960 mhz,rfid reader,dual frequency band operation,dual-l antenna,iso/iec standard,uhf antennas,planar inverted “f” antenna (pifa),loop antennas,radio-frequency identification (rfid),radiofrequency identification,circular polarization characteristics,circular polarization,antenna radiation patterns,the finite-difference time-domain (fdtd),ground plane,antenna feed network,antenna feeds,electromagnetic wave polarisation,radio frequency identification,ultra high frequency,finite difference time domain,antennas,finite difference methods
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