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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2020-10-22
Design and Evaluation of a Planar I-Shaped Folded-Patch Antenna for Compact Passive UHF RFID Tags to Cohere on Metal
By
Yongtao Ma,

    Dr. Yongtao Ma

    Tianjin University

    China

    Homepage

Hongfei Ning,

    Mr. Hongfei Ning

    China Tianjin Key Laboratory of Imaging and Sensing Microelectronic Technology

    China

    Homepage

Weijia Meng,

    Dr. Weijia Meng

    China Tianjin Key Laboratory of Imaging and Sensing Microelectronic Technology

    China

    Homepage

Chenglong Tian

    Dr. Chenglong Tian

    Tianjin University

    China

    Homepage

Progress In Electromagnetics Research Letters, Vol. 94, 49-55, 2020
doi:10.2528/PIERL20082201 | Google Scholar

Abstract
A planar I-shaped folded-patch antenna with a footprint of 21 mm x 21 mm x 1.6 mm is designed for compact UHF RFID tags to cohere on metal. The antenna consists of three parts: a square ground plane, an I-shaped patch and a ring resonator. The I-shaped patch is interconnected to the ground plane through a narrow shorting stub, and the microstrip feed line is inserted into the patch to reduce the input impedance of the patch. Extra capacitance and inductance introduced by the ring resonator can lower the tag's resonant frequency down to the expected UHF RFID band. The proposed antenna is manufactured, and there is excellent consistency between simulation and measurement results. The proposed tag antenna achieves a far read distance up to 6.3 m on metal (with 4 W equivalent isotropic radiated power) at resonant frequency of 920 MHz.
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Citation
Yongtao Ma, Hongfei Ning, Weijia Meng, and Chenglong Tian, "Design and Evaluation of a Planar I-Shaped Folded-Patch Antenna for Compact Passive UHF RFID Tags to Cohere on Metal," Progress In Electromagnetics Research Letters, Vol. 94, 49-55, 2020.
doi:10.2528/PIERL20082201
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