Open Access

ARTICLE

High Gain of UWB Planar Antenna Utilising FSS Reflector for UWB Applications

Ahmed Jamal Abdullah Al-Gburi^*, Imran Bin Mohd Ibrahim, Zahriladha Zakaria, Badrul Hisham Ahmad, Noor Azwan Bin Shairi, Mohammed Yousif Zeain

Department of Electronics and Computer Engineering (FKEKK), Center for Telecommunication Research and Innovation (CeTRI), Universiti Teknikal Malaysia Melaka (UTeM), Durian Tunggal, Malacca, Malaysia

* Corresponding Author: Ahmed Jamal Abdullah Al-Gburi. Email:

(This article belongs to this Special Issue: Advances in 5G Antenna Designs and Systems)

Computers, Materials & Continua 2022, 70(1), 1419-1436. https://doi.org/10.32604/cmc.2022.019741

Received 23 April 2021; Accepted 24 May 2021; Issue published 07 September 2021

Abstract

In this paper, a high gain and directional coplanar waveguide (CPW)-fed ultra-wideband (UWB) planar antenna with a new frequency selective surface (FSS) unit cells design is proposed for UWB applications. The proposed UWB antenna was designed based on the Mercedes artistic-shaped planar (MAP) antenna. The antenna consisted of a circular ring embedded with three straight legs for antenna impedance bandwidth improvement. The modelled FSS used the integration of a two parallel conductive metallic patch with a circular loop structure. The FSS provided a UWB stopband filter response covering a bandwidth of 10.5 GHz, for frequencies from 2.2 to 12.7 GHz. The proposed FSS had a compact physical dimension of 5 mm × 5 mm × 1.6 mm, with a printed array of 19 × 19 FSS unit cells. The FSS unit cells were printed on only one side of the dielectric FR4 substrate and placed as a sandwich between the antenna and the reflector ground plane. An equivalent circuit configuration (ECC) was used to verify the FSS unit cell structure’s performance. The simulated results indicated that the UWB MAP antenna and FSS reflector provided a fractional bandwidth of 136% and a high gain of 11.5 dB at 8.5 GHz with an acceptable radiation efficiency of 89%. Furthermore, the gain was improved across the operating band and kept between 8.3 and 11.5 dB. The proposed antenna was in good agreement between theoretical and experimental results and offered a wide enough bandwidth for UWB and vehicle applications.

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