Design and Experimental Evaluation of Modified Square Loop Feeding for UHF RFID Tags

Md Rokunuzzaman, Mohammad Tariqul Islam, Haslina Arshad, Mandeep Jit Singh and Norbahiah Misran

PLOS ONE, 2015, vol. 10, issue 7, 1-18

Abstract: This paper addresses the performance evaluation of a modified square loop antenna design for UHF RFID applications that is excited through a narrow feed line connected to a square loop, an impedance matching network. The square loop dimensions are modified to reach a conjugate impedance matching. A gap is fixed between the feed-lines to link the chip. To achieve impedance matching, the structures of the feed-line are optimized accordingly. In addition, the antenna consists of a straightforward geometry. An 11.9-meter maximum read range is achieved using a compact size of 80 × 44 mm2 and 3.2 W for the effective isotropic radiated power. Additional findings reveal that the proposed tag antenna is able to provide a stable resonance response in the near field of a large metallic surface.

Date: 2015
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0132530

DOI: 10.1371/journal.pone.0132530

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