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Design and Experimental Evaluation of Modified Square Loop Feeding for UHF RFID Tags.

Rokunuzzaman M, Islam MT, Arshad H, Jit Singh M, Misran N - PLoS ONE (2015)

Bottom Line: In addition, the antenna consists of a straightforward geometry.An 11.9-meter maximum read range is achieved using a compact size of 80 × 44 mm2 and 3.2 W for the effective isotropic radiated power.Additional findings reveal that the proposed tag antenna is able to provide a stable resonance response in the near field of a large metallic surface.

View Article: PubMed Central - PubMed

Affiliation: Department of Electrical Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia (UKM), Bangi, Selangor, Malaysia.

ABSTRACT
This paper addresses the performance evaluation of a modified square loop antenna design for UHF RFID applications that is excited through a narrow feed line connected to a square loop, an impedance matching network. The square loop dimensions are modified to reach a conjugate impedance matching. A gap is fixed between the feed-lines to link the chip. To achieve impedance matching, the structures of the feed-line are optimized accordingly. In addition, the antenna consists of a straightforward geometry. An 11.9-meter maximum read range is achieved using a compact size of 80 × 44 mm2 and 3.2 W for the effective isotropic radiated power. Additional findings reveal that the proposed tag antenna is able to provide a stable resonance response in the near field of a large metallic surface.

No MeSH data available.


Read range of the antenna at zx-plane.
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pone.0132530.g015: Read range of the antenna at zx-plane.

Mentions: The desired read range characteristics depend entirely on the RFID applications. Nevertheless, long-range tag detection is preferred in most of the applications. The NXP ASIC used for this passive tag antenna design contains a maximum sensitivity of -18 dBm. A reader module of model no. R420 by Impinj is connected to a horn antenna with model no. SAS-571. The horn antenna’s performance is calibrated for a distance of 10 meters. The horn antenna has a gain of 7.6 dBi at 900 MHz. The Malaysian Communications and Multimedia Commission provides the guideline that a maximum EIRP power of 3.2 W can be used as the transmission power for the reader antenna. Fig 15 demonstrates the antenna’s measured read range using a 3.2-W EIRP power at the zx-plane. The read range is taken towards the normal of the antenna. A maximum read range of 11.9 meters is reached from the proposed tag antenna with stable performance.


Design and Experimental Evaluation of Modified Square Loop Feeding for UHF RFID Tags.

Rokunuzzaman M, Islam MT, Arshad H, Jit Singh M, Misran N - PLoS ONE (2015)

Read range of the antenna at zx-plane.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4503450&req=5

pone.0132530.g015: Read range of the antenna at zx-plane.
Mentions: The desired read range characteristics depend entirely on the RFID applications. Nevertheless, long-range tag detection is preferred in most of the applications. The NXP ASIC used for this passive tag antenna design contains a maximum sensitivity of -18 dBm. A reader module of model no. R420 by Impinj is connected to a horn antenna with model no. SAS-571. The horn antenna’s performance is calibrated for a distance of 10 meters. The horn antenna has a gain of 7.6 dBi at 900 MHz. The Malaysian Communications and Multimedia Commission provides the guideline that a maximum EIRP power of 3.2 W can be used as the transmission power for the reader antenna. Fig 15 demonstrates the antenna’s measured read range using a 3.2-W EIRP power at the zx-plane. The read range is taken towards the normal of the antenna. A maximum read range of 11.9 meters is reached from the proposed tag antenna with stable performance.

Bottom Line: In addition, the antenna consists of a straightforward geometry.An 11.9-meter maximum read range is achieved using a compact size of 80 × 44 mm2 and 3.2 W for the effective isotropic radiated power.Additional findings reveal that the proposed tag antenna is able to provide a stable resonance response in the near field of a large metallic surface.

View Article: PubMed Central - PubMed

Affiliation: Department of Electrical Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia (UKM), Bangi, Selangor, Malaysia.

ABSTRACT
This paper addresses the performance evaluation of a modified square loop antenna design for UHF RFID applications that is excited through a narrow feed line connected to a square loop, an impedance matching network. The square loop dimensions are modified to reach a conjugate impedance matching. A gap is fixed between the feed-lines to link the chip. To achieve impedance matching, the structures of the feed-line are optimized accordingly. In addition, the antenna consists of a straightforward geometry. An 11.9-meter maximum read range is achieved using a compact size of 80 × 44 mm2 and 3.2 W for the effective isotropic radiated power. Additional findings reveal that the proposed tag antenna is able to provide a stable resonance response in the near field of a large metallic surface.

No MeSH data available.