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Circularly-polarized capacitively-fed UHF-RFID antenna with truncated reverse-arc shape

Author

Listed:
  • Komkris Boonying
  • Chuwong Phongcharoenpanich

Abstract

This article presents a circularly polarized (CP) flat antenna with truncated corners using the capacitively coupled feed technique for UHF RFID applications. A radiating plate, an air gap and a ground plane constitute the antenna. The reverse-arc shape truncated corners are utilized to generate a CP radiation and the suspended structure antenna using the capacitively coupled feed technique is adopted to enhance S11$ \left|S_{11}\right| $ bandwidth. A prototype antenna was fabricated and its measured results were 13% for the S11$ \left|S_{11}\right| $ bandwidth and 11.54% for the 3-dB axial ratio (AR) bandwidth. The half-power beamwidths of the left hand circular polarization on x–y and x–z planes were both greater than 80∘$ 80^{\circ } $. The measured gain on the UHF RFID system was greater than 5.90 dBic.

Suggested Citation

  • Komkris Boonying & Chuwong Phongcharoenpanich, 2015. "Circularly-polarized capacitively-fed UHF-RFID antenna with truncated reverse-arc shape," Journal of Electromagnetic Waves and Applications, Taylor & Francis Journals, vol. 29(15), pages 2052-2065, October.
    • Handle: RePEc:taf:tewaxx:v:29:y:2015:i:15:p:2052-2065
    DOI: 10.1080/09205071.2015.1078749
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