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Theoretical study of ground radiation tag antenna with Tunable open-slot exciter

Published online by Cambridge University Press:  15 August 2016

Yi-Fang Lin
Affiliation:
Institute of Photonics and Communications, National Kaohsiung University of Applied Sciences, Kaohsiung 807, Taiwan. Phone: +886 7 3814526#3351
Ming-Jui Chang
Affiliation:
Institute of Photonics and Communications, National Kaohsiung University of Applied Sciences, Kaohsiung 807, Taiwan. Phone: +886 7 3814526#3351
Hua-Ming Chen*
Affiliation:
Institute of Photonics and Communications, National Kaohsiung University of Applied Sciences, Kaohsiung 807, Taiwan. Phone: +886 7 3814526#3351
Shih-Ting Huang
Affiliation:
Institute of Photonics and Communications, National Kaohsiung University of Applied Sciences, Kaohsiung 807, Taiwan. Phone: +886 7 3814526#3351
*
Corresponding author: H.-M. Chen Email: hmchen@kuas.edu.tw

Abstract

A novel radio frequency identification tag antenna is composed of a resonant open-slot exciter and a dipole-type ground radiator. For a conjugate match to the Alien Higgs-4 chip impedance of 8−j149 Ω at 925 MHz, a quarter wavelength open-slot resonator embedded at the center of the dipole-type ground plane (130 × 18 mm2) was investigated and fabricated. Simple size adjustments and various loaded inductor of the open-slot resonator allow for easy control of the tag antenna resistance and inductive reactance, from which the chip impedance requirement can be easily obtained. The read range of the prototype antenna attached on a foam in the free space can reach more than 9 m, which has been tested for a radio frequency identification reader with 4.0-W of effective isotropic radiated power. Measurement data are in good agreement with simulation results.

Type
Research Papers
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2016 

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