High-performance UWB Vivaldi antenna on FR4: A cost-effective solution for wearable technologies

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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.accessioned2025-04-18T10:32:29Z
dc.date.available2025-04-18T10:32:29Z
dc.date.issued2025
dc.departmentİstinye Üniversitesi, Mühendislik ve Doğa Bilimleri Fakültesi, Elektrik-Elektronik Mühendisliği Bölümü
dc.description.abstractThis paper introduces a novel Vivaldi Tapered Slot Antenna (VTSA) designed for wearable Ultra-Wideband (UWB) applications, utilizing a cost-effective FR4 substrate with a thickness of 0.8 mm. The proposed design achieves an 18.81 % size reduction (38.3 mm × 27.06 mm × 0.8 mm), a 36.16 % bandwidth (BW) increase, and a 16.63 % gain improvement compared to a VTSA using a Rogers RO4003C substrate (42.9 mm × 28.28 mm × 0.813 mm). The key contributions of this work include the effective use of the affordable FR4 substrate to achieve high performance, improvements in antenna compactness and BW through innovative slot designs, and the enhancement of gain and radiation pattern stability through the addition of directors to the slots. These modifications significantly boost the antenna's performance while maintaining a compact design. The antenna's suitability for wearable applications was validated through testing on flat and curved human phantoms made of skin, fat, and muscle, showing low Specific Absorption Rate (SAR) values across the UWB spectrum, confirming its safety for body-centric use. Measured results include S11 values below -10.56 dB over the 3.66–20.42 GHz range, a peak gain of 8.1 dBi, stable radiation patterns, and an average group delay of 0.83 ns. Simulations using Computer Simulation Technology (CST) were validated by experimental testing, demonstrating the antenna's potential for wearable and body-centric applications. © 2025 The Author(s)
dc.description.sponsorshipThis study is supported via funding from Enterprise Ireland. Thanks also extended to the Centre for Wireless Innovation (CWI), School of Electronics, Electrical Engineering and Computer Science (EEECS) at Queens University Belfast for their assistance with the measurements. Funding text 2 This study is supported via funding from Prince Sattam bin Abdulaziz University project number ( PSAU/2024/R/1445 ) and Enterprise Ireland. Thanks also extended to the Centre for Wireless Innovation (CWI), School of Electronics, Electrical Engineering and Computer Science (EEECS) at Queens University Belfast for their assistance with the measurements.
dc.identifier.citationSaleh, S., Saeidi, T., Timmons, N., Alali, B., Razzaz, F., & Althuwayb, A. A. (2025). High-Performance UWB Vivaldi Antenna on FR4: A Cost-Effective Solution for Wearable Technologies. Results in Engineering, 104230.
dc.identifier.doi10.1016/j.rineng.2025.104230
dc.identifier.issn25901230
dc.identifier.scopus2-s2.0-85216807964
dc.identifier.scopusqualityQ1
dc.identifier.urihttp://dx.doi.org/10.1016/j.rineng.2025.104230
dc.identifier.urihttps://hdl.handle.net/20.500.12713/7112
dc.identifier.volume25
dc.indekslendigikaynakScopus
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.subjectCompact Design
dc.subjectFR4 Substrate
dc.subjectLow SAR
dc.subjectMicrostrip to Slot (M/S)Transitions
dc.subjectUltra-Wideband (UWB)
dc.subjectVivaldi Tapered Slot Antenna (VTSA)
dc.subjectWearable Antenna and CST
dc.titleHigh-performance UWB Vivaldi antenna on FR4: A cost-effective solution for wearable technologies
dc.typeArticle

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