Publications Scientifiques

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    Novel High Efficiency V-Band Pure TEM D-PRGW Antenna for 5G mmWave Applications
    (John Wiley & Sons, 2024) Khodja, Khalida; Atia, Salim; Messaoudene, Idris; Belazzoug, Massinissa; Merabet, I.; Melouki, Noureddine; Denidni, Tayeb A.
    This paper starts with the proposal of an enhanced version of a planar rectangular slot antenna fed by the quasi-TEM printed ridge gap waveguide (PRGW), attended with a numerical study of a miniaturization procedure showing the limitations of the conventional PRGW-based antennas. Then innovative solution is introducing a new miniaturized pure TEM wide-band slot antenna utilizing double PRGW (D-PRGW) technology; the proposed approach is self-packaged and shows high potential for enhancing antenna performance, particularly in terms of bandwidth, gain, and compactness. This technology is featured with low loss, high performance, and compact size; it consists of surrounding the ridge area with a double layer of electromagnetic band gap (EBG) lattice instead of one to eliminate the surface waves effectively and keep the signal completely confined inside the ridge area with strict minimum rows of EBG. Therefore, a broad impedance matching bandwidth (|S11| ≤ −10 dB) of 33.33% is obtained from 50 to 70 GHz, which covers the unlicensed NR parts (n262; amp; n263) of the V band. Furthermore, the antenna achieves a peak gain of approximately 16 at 65 GHz while the overall efficiency remains above 90% across the entire operating frequency band. The high performance along with the compact size of this novel design makes it a good candidate for 5G wireless communications applications centered around 60 GHz.
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    Wideband Hybrid Dielectric Resonator Antenna Array for 5G mmWave Mobile Applications
    (Institute of Electrical and Electronics Engineers Inc., 2024) Zidour, Ali; Alibakhshikenari, Mohammad; Ayad, Mouloud; See, Chan Hwang; Limiti, Ernesto
    In this paper, a wideband hybrid dielectric resonator antenna (HDRA) array design is presented for fifth-generation (5G) millimeter wave (mmWave) applications. The hybrid antenna integrates three resonant radiators of feeding slot, ring patch, and DRA to generate four resonances around 28 and 38 GHz frequency bands. The antenna element within an overall size of 0.46λL × 0.46λL× 0.1λL(λLis the free-space wavelength at 28 GHz) can achieve wide impedance bandwidth, covering n257, n259, n260 and n261, simultaneously. The 1 × 4 HDRA array is designed and simulated based on the antenna element which can achieve high realized gain varies between 10.3 to 12.5 dBi and wide beam scanning angles of ±55° and ±40° at 28 and 38 GHz frequency bands, respectively.
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    Wideband Endfire Antenna Array for 5G mmWave Mobile Terminals
    (Institute of Electrical and Electronics Engineers Inc., 2024) Zidour, Ali; Ayad, Mouloud; Alibakhshikenari, Mohammad; See, Chan Hwang; Lai, Ying-Xin; Ma, Yue.; Guenad, Boumediene; Livreri, Patrizia; Khan, Salahuddin; Pau, Giovanni; Denidni, Tayeb A.
    In this paper, a compact endfire antenna array with low-profile, small clearance, and wideband operation is proposed for millimeter-wave (mmWave) fifth-generation (5G) mobile terminals. The wideband operation is achieved by exciting two identical bow-tie dipoles inserted on both sides of a multilayer substrate fed by an asymmetric open-end stripline to slotline transition. The antenna performance is significantly improved by introducing a set of vertical metallic vias. The proposed antenna element can achieve 29 % from 24.2 GHz to 32.4 GHz with a peak realized gain that varies from 3.5 dBi to 4.5 dBi. A linear 4-element antenna array is arranged and fabricated to verify the proposed antenna beamforming capabilities. The simulated and measured bandwidth achieves a wide range of 34.4 % (24-34 GHz) to support 26, 28, and 30 GHz 5G mmWave bands with an isolation level better than 20 dB and a peak realized gain over the interested bands ranging from 7.56 to 8.14 dBi. The simulated array scanning angle is ± 68° at 28 GHz within 3-dB gain deterioration. Furthermore, the simulated spherical coverage has met the requirements of 3GPP standards which make the proposed antenna array a promising candidate to be integrated within mmWave 5G mobile devices
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    Dual-beam DRA based array for 5G applications
    (IEEE, 2021) Khodja, Khalida; Belazzoug, Massinisssa; Atia, Salim; Messaoudene, Idris; Denidni, Tayeb A.
    In this paper, a dual-beam array antenna based on triangular dielectric resonator (TDR) is presented for Ka-band applications. It consists of 2×1 radiating elements sharing a common ground plane and plated with a thin copper layer at the upper side. The antenna effectively covers two separate bands (28 GHz and 33GHz) with a double-beam radiation at both operating frequencies. This structure has achieved a return loss lower than -20dB with a corresponding gain of more than 8 dBi at 28GHz and 6dBi at 33GHz, and a high radiation efficiency (≥90%) across each band. The radiation pointing angles are centered at ±28° (28GHz) and ±31° (33GHz) with a wide angular width of more than 30°, respectively
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    Performance evaluation of a 60-GHz RoF-OFDM system for wireless applications
    (Springer, 2021) Yahia, Selma; Graini, Leila; Beddiaf, Safia; Benmessaoud Gabis, Asma; Meraihi, Yassine
    Radio over fiber (RoF) is an emerging and promising communication technology based on combining wireless and fiber-optic communications, where light is modulated with radio frequency signals and transmitted over the optical fiber. This paper proposes a modified RoF communication system based on the incorporation of the orthogonal frequency division multiplexing (OFDM) technique into RoF system, called RoF-OFDM. We focus on the transmission of OFDM signals at the frequency of 60 GHz. The performance of the proposed RoF-OFDM system is evaluated in terms of bit error rate (BER) and the constellation diagrams. For this purpose, we use three different formats of quadrature amplitude modulation (QAM) such as 16-QAM, 64-QAM, and 256-QAM, and various values of data rate, Optical Signal-to-Noise Ratio (OSNR), input optical power, and fiber length. Simulation results show that RoF-OFDM system using 16-QAM gives good results in terms of fiber length and OSNR. However, the best performance using 64-QAM is obtained in the case of optical power. In addition, in terms of bit rate, 16-QAM outperforms both 64-QAM and 256-QAM formats for a bit rate lower than 17 Gbit/s. Otherwise, the best performance is given with 64-QAM