Compact Broadband Dual Coupling-Feed Circularly Polarized RFID Microstrip Tag Antenna Mountable on Metallic Surface

@article{Chen2012CompactBD,
  title={Compact Broadband Dual Coupling-Feed Circularly Polarized RFID Microstrip Tag Antenna Mountable on Metallic Surface},
  author={Horng-Dean Chen and Chow-Yen-Desmond Sim and Shang-Huang Kuo},
  journal={IEEE Transactions on Antennas and Propagation},
  year={2012},
  volume={60},
  pages={5571-5577}
}
A square-shaped microstrip RFID tag antenna designed for 915 MHz band is proposed. The antenna is capacitively excited by a dual-offset coupling feed network with one of the feed lines a quarter-wavelength longer than the other. By selecting appropriate dimensions for the coupled lines and feed-lines, along with desirable coupling distance between the coupled line and square patch, the input impedance of the proposed tag antenna can be easily controlled, which results in excellent impedance… CONTINUE READING
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