Two-pair slots inserted CP patch antenna for wide axial ratio beamwidth

Mrityunjoy Kumar Ray*, Kaushik Mandal, Nasimuddin Nasimuddin, Ali Lalbakhsh, Raad Raad, Faisel Tubbal

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)
114 Downloads (Pure)


In this article, a low profile circularly polarized (CP) antenna with wide 3-dB axial ratio beamwidth (ARBW) is presented. Two-pair of parallel slots are etched on a circular patch and manifested as magnetic dipoles (MDs). These narrow slots are arranged symmetrically about the axes, and one pair is orthogonal to another pair of slots. The philosophy of CP radiation across a wide angular range strongly depends on the spacing between the paired-dipoles, for example spacing of 0.22λ 0, two-orthogonal far-field radiated components become equal across a wide-angle. Moreover, this particular spacing between the paired-dipoles provides a symmetrical electric field distribution along the periphery of the patch, which ensures the broadside LHCP radiation with wide 3-dB ARBW of 228° and 214° at the plane of φ = 0° and φ = 90°, respectively. The measured results from the fabricated prototype exhibit good agreement with the simulated results. The antenna has impedance bandwidth (IBW) and CP bandwidth (CPBW) of 2.6% (64 MHz), and 0.9% (22 MHz), respectively. The broadside radiation holds antenna gain higher than 5 dBic across the entire CPBW.

Original languageEnglish
Pages (from-to)223316-223324
Number of pages9
JournalIEEE Access
Publication statusPublished - 2020

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