Design of a Modified MIMO Antenna Based on Tweaked Spherical Fractal Geometry for 5G New Radio (NR) Band N258 (24.25–27.25 GHz) Applications
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Published:2023-09-29
Issue:10
Volume:7
Page:718
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ISSN:2504-3110
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Container-title:Fractal and Fractional
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language:en
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Short-container-title:Fractal Fract
Author:
Bisht Nitasha1, Malik Praveen Kumar1, Das Sudipta2ORCID, Islam Tanvir3ORCID, Asha Sivaji4, Alathbah Moath5ORCID
Affiliation:
1. Department of Electronics and Communication Engineering, Lovely Professional University, Phagwara 144411, Punjab, India 2. Department of Electronics and Communication Engineering, IMPS College of Engineering and Technology, Malda 732103, West Bengal, India 3. Department of Electrical and Computer Engineering, University of Houston, Houston, TX 77204, USA 4. Department of Electronics and Communication Engineering, Saveetha Engineering College, Saveetha Nagar, Thandalam, Chennai 602105, Tamil Nadu, India 5. Department of Electrical Engineering, College of Engineering, King Saud University, Riyadh 11451, Saudi Arabia
Abstract
This article describes a fractal-based MIMO antenna for 5G mm-wave mobile applications with micro-strip feeding. The proposed structure is a fractal-based spherical configuration that incorporates spherical slots of different iterations on the patch, as well as rectangular slots on the ground plane. These additions are meant to reduce patch isolation. The two-element MIMO antenna has closely spaced antenna elements that resonate at multiple frequencies, 9.5 GHz, 11.1 GHz, 13.4 GHz, 15.8 GHz, 21.1 GHz, and 26.6 GHz, in the frequency range of 8 to 28 GHz. The antenna’s broadest operational frequency range spans from 17.7 GHz to 28 GHz, encompassing a bandwidth of 10,300 MHz. Consequently, it is well-suited for utilization within the millimeter wave (mm wave) application, specifically for the 5G new radio frequency band n258, and partially covers some other bands X (8.9–9.9 GHz, 10.4–11.4 GHz), and Ku (13.1–13.7 GHz, 15.4–16.2 GHz). All the resonating bands have isolation levels below the acceptable range of (|S12| > −16 dB). The proposed antenna utilizes a FR4 material with dimension of 28.22 mm × 44 mm. An investigation is conducted to analyze the effectiveness of parameters of the antenna, including radiation pattern, surface current distributions and S parameters. Furthermore, an examination and assessment are conducted on the efficacy of the diversity system inside the multiple input multiple output (MIMO) framework. This evaluation encompasses the analysis of key performance metrics such as the envelope correlation coefficient (ECC), diversity gain (DG), and mean effective gain (MEG). All antenna characteristics are determined to be within a suitable range for this suggested MIMO arrangement. The antenna design underwent experimental validation and the simulated outcomes were subsequently verified.
Funder
Deputyship for Research and Innovation, Ministry of Education, Saudi Arabia
Subject
Statistics and Probability,Statistical and Nonlinear Physics,Analysis
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