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Abstract : A diversity antenna combining four inverted-F antennas (IFAs) is evaluated for UHF RF identification (RFID) readers. Polarisation and pattern diversities are obtained for a sequentially rotated configuration of the IFAs. Mutual coupling between ports is minimised by etching quarter-wavelength slots into the ground plane. The resulting envelope correlation coefficient is less than 0.003 in the working band. A switching diversity scheme is then applied to evaluate the tags readability in a lab environment. It is shown that the antenna diversity enhances the reading range compared to a circularly or a linearly polarised antenna of the same size.
https://hal-upec-upem.archives-ouvertes.fr/hal-00767400
Contributor : Jean-Marc Laheurte
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Submitted on : Thursday, December 20, 2012 - 5:32:26 PM
Last modification on : Thursday, February 7, 2019 - 2:53:17 PM
Long-term archiving on : Thursday, March 21, 2013 - 3:46:38 AM
B. Ouattara, C. Hamouda, B. Poussot, Jean-Marc Laheurte. Compact diversity antenna for UHF RFID readers. Electronics Letters, IET, 2012, 48 (16), pp.975-977. ⟨hal-00767400⟩
