用于RFID标签的高频比天线

2007 International workshop on Antenna Technology: Small and Smart Antennas Metamaterials and Applications Pub Date : 2007-03-21 DOI:10.1109/IWAT.2007.370132

Jieh‐Sen Kuo, Jyun-Jie Wang, Chih-Yu Huang

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引用次数: 0

摘要

提出了一种具有近场和远场两种不同工作机制的双频射频识别(RFID)天线，其高频比约为180。所提出的天线是通过打印矩形螺旋形和曲线形的线条得到的，将其作为RFID标签的天线放置在矩形微波衬底的上方，其接地面位于衬底的底部。该天线采用印制在同一衬底上的50 ω微带线馈电，可以很好地激发天线的两个谐振频率，阻抗匹配良好。获得了更接近全向辐射方向图和更低的交叉极化电平(至少25 db)

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High frequency ratio antenna for RFID tags

A novel high frequency ratio of about 180 for dual-frequency radio frequency identification (RFID) antenna with two different operation mechanisms (near field and far field operation) is proposed. The proposed antenna is obtained by printing a rectangular-spiral-shaped and a meander-shaped line, which is placed above on a rectangular microwave substrate as a RFID tag's antenna where its ground plane is at the bottom of substrate. The proposed antenna is fed by a 50 Omega microstrip line printed on the same substrate, and the antenna's two resonant frequencies can be excited with good impedance matching. Closer to omni-directional radiation patterns and the lower cross-polarization levels (at least 25-dB) are also obtained

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来源期刊

2007 International workshop on Antenna Technology: Small and Smart Antennas Metamaterials and Applications

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