A Compact Wideband Circularly Polarized Planar Monopole Antenna With Axial Ratio Bandwidth Entirely Encompassing the Antenna Bandwidth

Falih M. Alnahwi, Yasir I.A. Al-Yasir, Nazar T. Ali, Ibrahim Gharbia, Chan Hwang See, Raed A. Abd-Alhameed

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

The antenna presented in this study is a compact wideband monopole with wideband circular polarization that can be used across the whole antenna bandwidth. A rectangular C-shaped patch is partially covered by a ground plane in the proposed planar monopole antenna. Inserting a rectangular stub to the ground plane, etching a slit at the antenna patch, and adding a semicircular stub at the top of the antenna feed line increase the antenna impedance bandwidth (BW) and axial ratio bandwidth (ARBW). An FR4 substrate with overall dimensions of 25 mm ×25 mm ×1.6 mm is used to create the antenna. The antenna's observed impedance BW is 70% (4.55 GHz in the 4.3-8.85 GHz band), while the measured broadside ARBW is improved to a value of 82.2 percent (5.3 GHz along the range 3.8-9.1 GHz). The impedance BW is perfectly covered by the ARBW; hence the antenna can be considered circularly polarized throughout its operational spectrum. Within the antenna BW, the measured gain is greater than 1.5 dB.

Original languageBritish English
Pages (from-to)81828-81835
Number of pages8
JournalIEEE Access
Volume10
DOIs
StatePublished - 2022

Keywords

  • Axial ratio
  • circular polarization
  • planar antenna
  • wideband

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