Browsing by Author "Lamri, Isam Eddine"

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Citation - WoS: 11
Citation - Scopus: 15
Design and Development of a Graphene-Based Reconfigurable Patch Antenna Array for Thz Applications
(Walter De Gruyter Gmbh, 2023) Lamri, Isam Eddine; Ahmad, Sarosh; Nakmouche, Mohammed Farouk; Ghaffar, Adnan; Fawzy, Diaa E.; Allam, A. M. M. A.; Ali, Esraa Mousa
This paper presents a graphene-based antenna array for terahertz (THz) applications. The suggested antenna array has four radiating square shaped patches fed by a coplanar waveguide (CPW) technique. The proposed antenna array operates at the three frequencies with operational bandwidths of 1.173-1.210 THz (at 1.19 THz), 1.270-1.320 THz (at 1.3 GHz), and 1.368-1.346 THz (at 1.4 GHz). The total area of the antenna array is reported as 1000 x 1000 mu m(2), printed on a Silicon substrate with a thickness of 20 mu m and a dielectric constant of epsilon( r ) = 11.9. To enhance the structure's performance and optimize the feeding network, a parametric analysis was performed using the FDTD technique. Furthermore, the key properties of the proposed antenna array, such as resonance frequency, peak gain, and radiation efficiency, may be changed by adjusting the chemical potentials of the graphene in the antenna array. The use of graphene's chemical potential tuneability yields exceptional results comparing to the recent research outputs, with a peak gain and radiation efficiency of 10.45 dB and 70%, respectively. These results show the performance of the suggested design for constructing antenna arrays for use in THz applications.
Citation - WoS: 3
Design of Novel Uwb 4-Element Mimo Microstrip Patch Antenna for Sub-6 Ghz 5g Applications
(IEEE, 2021) Lamri, Isam Eddine; Mansoul, Ali; Nakmouche, Mohammed Farouk; Belattar, Mounir
The aim of this paper is the development of a 2x2 MIMO antenna that is capable of covering the whole UWB spectrum of 3.1 - 10.6 GHz. The design starts by implementing a single element of Printed Circular Disc Monopole (PCDM) antenna on a 1.6 mm thick FR-4 substrate having a relative permittivity of 4.4. A parametric analysis, as well as slots insertion, are performed based on Finite Difference Time Domain Analysis (FDTD) to improve the structure performance related to the operating bandwidth. Concerning the MIMO antenna structure, a four-element configuration is investigated. Over the intended frequency band, the isolation is greater than 15 dB. The Envelope Correlation Coefficient (ECC), Diversity Gain (DG), and Channel Capacity Loss (CCL) have all been shown to improve diversity performance and are determined to be within acceptable limits. A network analyzer is used to measure the antenna structure once it is constructed. In terms of scattering characteristics and spectral efficiency, the measured and simulated are in good agreement.