Design and modelling of a compact circularly polarized antenna for RFID applications

Tanmaya Kumar Das, Biswajit Dwivedy, Debakanta Behera, Santanu Kumar Behera, Nemai Chandra Karmakar

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1 Citation (Scopus)


In this article, a single-feed, miniaturized, circularly polarized (CP) microstrip patch antenna (MPA) using Koch fractal geometry for RFID applications is presented. The design consists of a probe-fed slotted square-shaped patch with the fractal edge and two pairs of capacitively coupled grounded metal strips. The proposed design methodology is validated by designing two prototypes (Antenna 1 and Antenna 2), which are operating at 2.435 GHz and 5.78 GHz respectively. Both antennas show right-hand circular polarization (RHCP) characteristics with 3 dB axial ratio bandwidth (ARBW) covering 2.433–2.439 GHz and 5.75–5.8 GHz respectively. This design leads to a reduction in the overall size of the antennas, to meet the demands of portable wireless devices.

Original languageEnglish
Article number153313
Number of pages9
JournalAEU - International Journal of Electronics and Communications
Publication statusPublished - Aug 2020


  • Axial ratio
  • Circular polarization
  • Fractal
  • RFID

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