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

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

Authors

Falih M. Mousa

Yasir I. A. Al-Yasir

Nazar T. Ali

Ibrahim Gharbia

Raed Abd-Alhameed



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.

Journal Article Type Article
Acceptance Date Jul 25, 2022
Online Publication Date Aug 4, 2022
Publication Date 2022
Deposit Date Jul 25, 2022
Publicly Available Date Jul 26, 2022
Journal IEEE Access
Publisher Institute of Electrical and Electronics Engineers
Peer Reviewed Peer Reviewed
Volume 10
Pages 81828-81835
DOI https://doi.org/10.1109/ACCESS.2022.3196610
Keywords Axial Ratio, circular polarization, planar antenna, wideband
Public URL http://researchrepository.napier.ac.uk/Output/2892134

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