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2018-08-01

Dual-Band UHF RFID Tag Antenna Using Two Eccentric Circular Rings

By Bidisha Barman, Sudhir Bhaskar, and Amit Kumar Singh
Progress In Electromagnetics Research M, Vol. 71, 127-136, 2018
doi:10.2528/PIERM18062001

Abstract

A low profile dual-band passive Ultra High Frequency Radio Frequency Identification (UHF RFID) tag antenna designed to operate at two RFID bands allocated for use in Europe (865-868 MHz) and Japan (950-956 MHz) is proposed. The antenna has two eccentric circular rings of different radii to provide dual band response. An arc-shaped strip with Impinj Monza-4 IC chip is used to feed the two rings simultaneously by microstrip-line coupling-feed technique. The proposed design is simulated using Ansoft HFSS, and the prototype is fabricated. The return losses at 866 MHz and 952 MHz are measured to be -12.25 dB and -12.99 dB, respectively, which are in good agreement with the simulated results. The proposed antenna exhibits a 10 dB bandwidth of 9 MHz from 862 to 870 MHz and an 8 MHz 10 dB bandwidth from 949 to 956 MHz covering the UHF RFID bands in Europe and Japan. The maximum read ranges are measured to be around 3 m in the 865-868 MHz band and 2.6 m in the 950-956 MHz band.

Citation


Bidisha Barman, Sudhir Bhaskar, and Amit Kumar Singh, "Dual-Band UHF RFID Tag Antenna Using Two Eccentric Circular Rings," Progress In Electromagnetics Research M, Vol. 71, 127-136, 2018.
doi:10.2528/PIERM18062001
http://www.jpier.org/PIERM/pier.php?paper=18062001

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