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2013-02-07

Compact Loop Antenna for Near-Field and Far-Field UHF RFID Applications

By Xiao-Zheng Lai, Ze-Ming Xie, and Xuan-Liang Cen
Progress In Electromagnetics Research C, Vol. 37, 171-182, 2013
doi:10.2528/PIERC12123105

Abstract

A novel type of radio frequency identification (RFID) reader antenna is proposed for mobile ultra-high frequency (UHF) RFID device. By folded-dipole loop structure with parasitic element, a small antenna size of 31 * 31 * 1:6 mm3 is achieved. The antenna with different parasitic element size can work on different UHF RFID bands. The antenna prototype is fabricated and the measured bandwidth is around 13.5 MHz (915.5-929 MHz), which covers the China RFID Band (920-925 MHz). The measured reading distance achieves 65 mm with the near-field RFID tag and 1.17 m with the far-field tag. The measurement agrees well with simulated result and shows that antenna is desirable for both near-field and far-field UHF RFID applications.

Citation


Xiao-Zheng Lai, Ze-Ming Xie, and Xuan-Liang Cen, "Compact Loop Antenna for Near-Field and Far-Field UHF RFID Applications," Progress In Electromagnetics Research C, Vol. 37, 171-182, 2013.
doi:10.2528/PIERC12123105
http://jpier.org/PIERC/pier.php?paper=12123105

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