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Circularly polarized square slot microstrip antenna for RFID applications

  • Neha Sharma (a1), Anil Kumar Gautam (a1) and Binod Kumar Kanaujia (a2)

Abstract

In this paper, a novel circularly polarized square slot microstrip antenna is proposed for radio frequency identification (RFID) applications. The circular polarization is achieved by incorporating an arc-shaped strip in the square slot antenna. This antenna is fed by deformed bent feeding line to achieve a broad bandwidth (BW). The key parameters of the antenna are used for parametric study to understand the influence on the antenna performance. To validate simulation results of the design, a prototype is fabricated on the commercially available FR4 material. Measured results show a good agreement with the simulated results. It is found that the antenna shows an impedance BW of 170 MHz (844–1014 MHz) and axial-ratio BW of 170 MHz (834–1004 MHz), which shows that the proposed antenna is a good candidate to be used as a RFID antenna.

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Corresponding author

Corresponding author: A.K. Gautam Email: gautam1575@yahoo.co.in

References

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[8] Gautam, A.K.; Kunwar, A.; Kanaujia, B.K.: Circularly polarised arrowhead shape slotted microstrip antenna. IEEE Antennas Wireless Propag. Lett., 13 (2014), 471474.
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[12] Ansoft, HFSS simulator version 14.0.

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