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Performance analysis of double-face logarithmic spiral metamaterial superstrate for full enhancement of circularly polarized 5G spiral patch antenna investigated using characteristic mode analysis

Published online by Cambridge University Press:  07 February 2022

Ahmed Abdelaziz Open the ORCID record for Ahmed Abdelaziz [Opens in a new window] ,
Hesham A. Mohamed Open the ORCID record for Hesham A. Mohamed [Opens in a new window]  and
Ehab K. I. Hamad Open the ORCID record for Ehab K. I. Hamad [Opens in a new window]
Ahmed Abdelaziz*
Affiliation:
Department of Electronics and Communications, Luxor Higher Institute of Engineering & Technology, Luxor 85834, Egypt
Hesham A. Mohamed
Affiliation:
Department of Microstrip Circuits, Electronics Research Institute, Dokky, Giza 11843, Egypt
Ehab K. I. Hamad
Affiliation:
Department of Electrical Engineering, Faculty of Engineering, Aswan University, Aswan 81542, Egypt
*
Author for correspondence: Ahmed Abdelaziz, E-mail: d20190014@aswu.edu.eg
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Abstract

In this article, a novel double-face logarithmic spiral metamaterial (LSMTM) superstrate-inspired multiple-input multiple-output (MIMO) for fully enhanced circularly polarized (CP) antenna system is examined for 5G wireless communications. This novel double-face LSMTM superstrate acts as a planar concave-concave lens. Initially, the antenna is designed with a circular spiral patch to generate CP radiation in the frequency band of interest. Then, at a height of 6.5 mm (0.606 λo) above the MIMO antenna, which has a 0.8 mm (0.075 λo) edge-to-edge separation, the LSMTM superstrate is employed for isolation, gain, and bandwidth improvement. The proposed superstrate enhances the isolation, gain, and bandwidth of the antenna by about 32 dB, 3.47 dB, and 900 MHz, respectively. In contrast to the conventional technique of verifying operation with a simulated surface current distribution, characteristic mode analysis (CMA) is used to provide a better explanation of the proposed antenna's different modes and the creation of circular polarization. Additionally, the CMA supports the development of an effective technique that can predict whether or not the isolation can be further improved. The simulated results align with the measured results and are well adapted for 5G wireless communication devices.

Keywords

5Gcircularly polarizedlogarithmic spiralMIMO antennametamaterialsTheory of characteristic modessuperstrate
Type
Antenna Design, Modelling and Measurements
Information
International Journal of Microwave and Wireless Technologies , Volume 15 , Special Issue 1: EuCAP 2021 Special Issue , February 2023 , pp. 129 - 142
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Copyright
Copyright © The Author(s), 2022. Published by Cambridge University Press in association with the European Microwave Association

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