Wideband Circularly Polarized UHF-RFID Reader Antenna

Wideband Circularly Polarized UHF-RFID Reader Antenna
Title:
Wideband Circularly Polarized UHF-RFID Reader Antenna
Other Titles:
2018 IEEE International Conference on Service Operations and Logistics, and Informatics (SOLI)
DOI:
10.1109/SOLI.2018.8476761
Keywords:
Publication Date:
31 July 2018
Citation:
Nasimuddin and X. Qing, "Wideband Circularly Polarized UHF RFID Reader Antenna," 2018 IEEE International Conference on Service Operations and Logistics, and Informatics (SOLI), Singapore, 2018, pp. 127-130. doi: 10.1109/SOLI.2018.8476761
Abstract:
A wideband circularly polarized (CP) stacked square-patch antenna using single-feed is proposed for ultra-high frequency (UHF) radio frequency identification (RFID) readers. The proposed wideband CP antenna comprises of a main radiating patch, a parasitic patch, and a probe. A cross-shaped slot and a square-ring-shaped slot are cut into the radiating square-patch and the parasitic square-patch, respectively. The CP radiation is generated by the embedded cross-shaped slot inradiating square-patch along the diagonal line. The area and location of the embedded slots as well as the separation between the patches are optimized for a wideband CP radiation. The measured impedance (greater than 10 dB return loss) and CP radiation (3 dB axial ratio) bandwidths of an antenna prototype are 18.0%, or 165 MHz (0.840 GHz – 1.005 GHz) and 11.6%, or 105 MHz (0.855 GHz – 0.960 GHz), respectively. The measured gain is greater than 7 dBic across the 3 dB axial ratio frequency range, while the antenna dimension is 0.54λo×0.54λo×0.087λo (λo is free-space wavelength at 0.9 GHz).
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PublisherCopyrights
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Description:
© 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
ISBN:
978-1-5386-4522-2
978-1-5386-4521-5
978-1-5386-4523-9
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