Publications Scientifiques

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Author: search.filters.author.Denidni, Tayeb AhmedHas files: Yes

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    Design and simulation of 1 × 2, 1 × 4 and 2 × 8 microstrip patch antenna arrays based on photonic crystals for improved gain performance in THz
    (Springer, 2024) Benlakehal, Mohamed Elamine; Hocini, Abdesselam; Khedrouche, Djamel; Temmar, Mohamed Nasr eddine; Denidni, Tayeb Ahmed; Shayea, Ibraheem
    In a wireless communication system, a microstrip patch antenna is gaining importance as a most powerful technology trend and it is applicable for the development of low-cost, minimal-weight, low-profile and high-performance antenna. This paper presents the design and the analysis of 1 × 2, 1 × 4 and 2 × 8 rectangular microstrip patch antenna (RMPA) arrays based on the photonic crystals for improved gain performance and high radiation characteristics compared to ones that are designed based on the homogeneous substrate in the frequency range of 0.25 - 0.55 THz. The design of the proposed antenna arrays based on the photonic band gap (PBG) and the homogeneous substrate structures is made by using the designed single-element RMPA as the basic building element, and then, they were fed by the parallel feeding structure. The designed antenna arrays were simulated using CST Microwave Studio software and validated with the aid of Ansoft HFSS simulator. For high radiation characteristics, the proposed antenna arrays resonated around 0.35 THz which is a low loss frequency window in the terahertz band. The main results showed that the designed antenna arrays based on the PBG substrate structure outperform the antenna arrays based on the homogeneous substrate in terms of return loss, bandwidth, gain and directivity. The best directivity was achieved by the 2 × 8 RMPA array of 17.40 dBi, whereas the 1 × 4, 1 × 2 RMPA arrays and single-element RMPA achieved the directivity of 13.54 dBi, 9.87dBi and 7.76 dBi, respectively. Hence, the designed antenna arrays can be used for medical imaging, threat detection and wireless surveillance communication.
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    Design and analysis of a 2 × 2 microstrip ratch antenna array based on periodic and non-periodic photonic crystals substrate in THz
    (Springer, 2022) Benlakehal, Mohamed Elamine; Hocini, Abdesselam; Khedrouche, Djamel; Temmar, Mohamed Nasr Eddine; Denidni, Tayeb Ahmed
    In recent years, large demand for an antenna with high gain and larger bandwidth is required. In this paper, a 2 × 2 microstrip patch antenna array is designed and analyzed based on different substrates including periodic, non-periodic photonic crystals and homogeneous substrates. The proposed antenna array is designed to operate around 0.65 THz, which has applications in sensing and communication technologies. The simulated results showed that the designed antenna array based on periodic photonic crystals performed better than the conventional antenna array in terms of return loss, bandwidth, VSWR, gain, and radiation efficiency around 0.65 THz. Moreover, the performance of the proposed antenna array based on periodic photonic crystals is investigated by designing three other antenna arrays by using non-periodic photonic crystals substrate, which is divided into several sets of air holes, where each set of air holes had a different radius. The simulated results showed that the return loss, bandwidth, gain and radiation efficiency were improved by using non-periodic photonic crystals substrate compared to periodic photonic crystals substrate. The highest radiation characteristics were achieved by the fourth antenna array, which obtained a wide bandwidth greater than 291 GHz, whereas the return loss, gain and radiation efficiency were - 6 3.62 dB, 13.70 dB and 92.45% , respectively at a resonance frequency of 0.628 THz. The simulation has been performed using two different simulation techniques, CST Microwave Studio based on the finite integration technique and Ansys HFSS based on finite element technique which showed the convergence