Compact ultra-wide band two element vivaldi non-uniform slot MIMO antenna for body-centric applications

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dc.authorscopusidTale Saeidi / 56901296600
dc.authorwosidTale Saeidi / GCD-6200-2022
dc.contributor.authorSaleh, Sahar
dc.contributor.authorSaeidi, Tale
dc.contributor.authorTimmons, Nick
dc.contributor.authorAlali, Bader
dc.contributor.authorRazzaz, Faroq
dc.contributor.authorAlthuwayb, Ayman A.
dc.date.accessioned2025-05-09T06:04:27Z
dc.date.available2025-05-09T06:04:27Z
dc.date.issued2024
dc.departmentİstinye Üniversitesi, Mühendislik ve Doğa Bilimleri Fakültesi, Elektrik-Elektronik Mühendisliği Bölümü
dc.description.abstractThis work presents a novel compact two-port Vivaldi Non-uniform Slot MIMO Antenna (VNSMA) to overcome the challenges of traditional ultra-wideband (UWB) antennas, such as large size, limited bandwidth (BW), high mutual coupling, and suboptimal performance in wearable devices. Designed based on Vivaldi non-uniform slot profile antenna (VNSPA) theory, this antenna offers superior performance metrics and significantly advances wearable antenna technology. The novelty of this work is investigating different positions for the two compact UWB Vivaldi nonuniform Antennas (VNSAs) to get better performance with smaller sizes, wider impedance matching BW, and lower mutual coupling (MC) where side by side at an angle of 180ᵒ is determined to be the best configuration. Detailed parametric studies were performed on this configuration for better performance, where the MC was further reduced by etching the ground plane with a vertical slot between the two antennas and L slots around the Microstrip to Slot (M/S) transition, respectively. Furthermore, BW and gain enhancements were obtained by etching exponential tapered and triangular slots at its two edges. Using the Finite Integration Technique (FIT), Computer Simulation Technology (CST) software is used for the simulations in this work. The VNSMA is tested on a CST Gustav human phantom and gives excellent results with low specific absorption rate (SAR) values at several UWB frequencies. The proposed VNSMA provides good, measured outcomes of S11 < −11.08 dB with wide BW of 12.5 GHz (2.33–14.83 GHz) covering high isolation of −23 dB (for most of frequency band), moderate-high gain of 5.89 dBi, radiation efficiency of 66–90 %, low Envelope Correlation Coefficient (ECC) of 0.002 and high diversity gain (DG) of 9.99 dBi, stable radiation patterns, and average group delay of 1.2 ns. This innovative design, which optimizes antenna positioning and incorporates ground plane modifications, achieves remarkable improvements in BW, which covers multiple bands, including WLAN (2.4–2.485 GHz), X-band (8–12 GHz), and part of Ku band (12–18 GHz). The findings demonstrate the antenna's potential for various high-resolution microwave imaging applications, particularly in medical diagnostics like breast and brain cancer detection, showcasing its impact in wearable technology and healthcare. © 2024 The Authors
dc.description.sponsorshipThis study is supported via funding from Prince Sattam bin Abdulaziz University project number (PSAU/2024/R/1445) and Enterprise Ireland. The authors also want to thank the Center for Wireless Communications (CWI) at Queens University for their assistance with the measurements.
dc.identifier.citationSaleh, S., Saeidi, T., Timmons, N., Alali, B., Razzaz, F., & Althuwayb, A. A. (2024). Compact ultra-wide band two element vivaldi non-uniform slot MIMO antenna for body-centric applications. Results in Engineering, 24, 102839.
dc.identifier.doi10.1016/j.rineng.2024.102839
dc.identifier.issn25901230
dc.identifier.scopusqualityQ1
dc.identifier.urihttp://dx.doi.org/10.1016/j.rineng.2024.102839
dc.identifier.urihttps://hdl.handle.net/20.500.12713/7239
dc.identifier.volume24
dc.identifier.wosWOS:001316469500001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakScopus
dc.indekslendigikaynakWeb of Science
dc.institutionauthorSaeidi, Tale
dc.institutionauthoridTale Saeidi / 0000-0002-0995-3364
dc.language.isoen
dc.publisherElsevier B.V.
dc.relation.ispartofResults in Engineering
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectAnd CST
dc.subjectMicrostrip to Slot (M/S) Transitions
dc.subjectMIMO
dc.subjectUltra-Wideband (UWB)
dc.subjectVivaldi Tapered Slot Antenna (VTSA)
dc.titleCompact ultra-wide band two element vivaldi non-uniform slot MIMO antenna for body-centric applications
dc.typeArticle

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