A Simple Equivalent Circuit for Small RFID Tag Antennas in Low Loss Dielectric Materials

Yi Liao; Yuan Zhang; Kun Cai; Wei Gao

doi:10.4028/www.scientific.net/AMM.433-435.1470

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 433-435A Simple Equivalent Circuit for Small RFID Tag...

A Simple Equivalent Circuit for Small RFID Tag Antennas in Low Loss Dielectric Materials

Abstract:

Small radio frequency identification (RFID) tag antennas are generally designed to achieve conjugate matching with capacitive chips at the called tag resonant frequency. An approximate equivalent circuit is proposed to represent the antenna input impedance in low loss dielectric materials. It consists of a shunt conductance considered to be linearly proportional to loss tangent, an input resistance and reactance of antenna in lossless materials. Comparing with the simulated result of full wave numerical tool, the equivalent circuit gives acceptable errors in input resistance and reactance at the tag resonant frequency and nearby. The simple equivalent circuit can be used to reduce the repetitive simulation work for different loss tangent.

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Periodical:

Applied Mechanics and Materials (Volumes 433-435)

Pages:

1470-1473

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.433-435.1470

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Online since:

October 2013

Authors:

Yi Liao, Yuan Zhang, Kun Cai, Wei Gao

Keywords:

Dielectric Materials, Equivalent Circuit, Low Loss, RFID

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References

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