Julien Moussa H. Barakat- PhD. in Microwave and Optics
- Professor (Associate) at American University of the Middle East
Julien Moussa H. Barakat
- PhD. in Microwave and Optics
- Professor (Associate) at American University of the Middle East
About
31
Publications
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Introduction
Julien Moussa H. Barakat his PhD degree in 2008 in Joseph Fourier Univ in LETI (CEA) & Minatec, Grenoble, France. Currently, he is an Asso professor in AUM Kuwait. He is a senior member of the IEEE and a member of the OEA. Dr. Barakat, has authored/reviewed publications in the areas of antenna design / photonics. His research interests include high impedance surfaces, SOI integrated mm antenna, optical transmission, Machine learning, Internet of thing and the development of optical elements
Current institution
Publications
Publications (31)
Coupling light from a single-mode fiber into a waveguide is a significant issue. Numerous remedies have been introduced to this issue. In this paper, we numerically investigate a trapezoidal grating-based vertical coupler for symmetrical coupling applications. The power efficiency in both horizontal directions is identical. The coupling efficiency...
This work aims to explore the magnetohydrodynamic mixed convection boundary layer flow (MHD-MCBLF) on a slanted extending cylinder using Eyring–Powell fluid in combination with Levenberg–Marquardt algorithm–artificial neural networks (LMA-ANNs). The thermal properties include thermal stratification, which has a higher temperature surface on the cyl...
This work addresses the significant issue of plasma waves interacting with non-linear dynamical systems in both perturbed and unperturbed states, as modeled by the generalized Whitham–Broer–Kaup–Boussinesq–Kupershmidt (WBK-BK) Equations. We investigate analytical solutions and the subsequent emergence of chaos within these systems. Initially, we ap...
To comprehend the thermal regulation within the conical gap between a disk and a cone (TRHNF-DC) for hybrid nanofluid flow, this research introduces a novel application of computationally intelligent heuristics utilizing backpropagated Levenberg–Marquardt neural networks (LM-NNs). A unique hybrid nanoliquid comprising aluminum oxide, Al2O3, nanopar...
![Fig. 1. Channel capacity in [bits/symbol] plotted against SNR in dB:...](publication/379718242/figure/fig1/AS:11431281235447119@1712766892164/Channel-capacity-in-bits-symbol-plotted-against-SNR-in-dB-a-for-BPSK-QPSK-8-QAM_Q320.jpg)
The performance of intensity modulation (IM) with direct detection (DD) transmission systems is enhanced through a novel combination of multidimensional coding, Nyquist pulse shaping, and electronic dispersion compensation (EDC) at the transmitter using a finite impulse response (FIR) filter. A 24- dimensional (24D) extended Golay binary code effec...
Sound source localization for machines has been studied in microphone array and binaural paradigms in most cases, while much less work has been done in the single-microphone or monaural paradigm. This paper addresses this task and presents a system designed to classify azimuths of a speech-emitting source with respect to a binaural receiver, howeve...
An autonomous car must know where it is with high precision in order to maneuver safely and reliably in both urban and highway environments. Thus, in this paper, a reliable and relatively precise position estimation (localization) technique for autonomous vehicles is proposed and implemented. In dealing with the obtained sensory data or given knowl...
This paper proposes a novel code for optical code division multiple access (OCDMA) systems, called the three-dimensional (3D) spectral/temporal/spatial single weight zero cross-correlation (3D-SWZCC) code. The proposed code could potentially be used in the next generation of passive optical networks (NG-PONs) to provide a 3D-SWZCC-OCDMA-NG-PON syst...
Growing obesity has been a worldwide issue for several decades. This is the outcome of common nutritional disorders which results in obese individuals who are prone to many diseases. Managing diet while simultaneously dealing with the obligations of a working adult can be difficult. This paper presents the design and development of a smartphone-bas...
![Global mobile data traffic forecast for the period 2020 to 2030 (ITU) [2].](publication/369251156/figure/fig1/AS:11431281427663521@1746632024345/Global-mobile-data-traffic-forecast-for-the-period-2020-to-2030-ITU-2_Q320.jpg)
Short-reach transmission systems traditionally utilize intensity modulation (IM) at the transmitter and direct detection (DD) at the receiver due to their cost-effectiveness, small footprint, and low power consumption. However, with the exponential increase in bandwidth demand, coherent optical communication systems have become necessary for long-h...
p>Short-reach fiber optical links employing intensity modulation (IM) at the transmitter (Tx) and direct detection (DD) at the receiver (Rx), suffer from linear and nonlinear sources of impairments due to the interaction of chromatic dispersion (CD) with DD. In this article, joint electronic dispersion compensation (EDC) at the Tx, using two distin...
p>In this letter, we demonstrate joint electronic dispersion compensation (EDC) at the transmitter (Tx), using two distinct Gerchberg-Saxton (GS) based approaches, and at the receiver (Rx), using a functional link neural network (FLNN) equalizer for intensity modulation and direct detection (IM/DD) transmission. The first Tx approach utilizes the s...
![Time-domain pulse-shaping block diagram [2,20,21].](publication/355874544/figure/fig2/AS:11431281427532163@1746624753122/Time-domain-pulse-shaping-block-diagram-2-20-21_Q320.jpg)
The field of optical pulse-shaping and its applications is introduced, with a focus on time-domain approaches. A numerical investigation of all-fiber, time-domain, phase-only filtering is conducted for arbitrary temporal pulse synthesis. The theoretical phase modulation function required for generating use- specific target-intensity profiles is cal...
The design of integrated systems requires the knowledge of the values of the effective permittivity of the substrate. Designing antenna using computer-aided design tools is a long process that necessitates doing iterative steps to find the correct dimensions that meet specific requirements at a certain operating frequency. The objective of this wor...
A novel, programmable, mode-locked fiber laser design is presented and numerically demonstrated. The laser programmability is enabled by an intracavity optical phase-only pulse shaper, which utilizes the same linearly chirped fiber Bragg grating (LC-FBG) from its two opposite ends to perform real-time optical Fourier transformation. A binary bit-pa...
The performance of a 60 GHz folded-slot antenna integrated on high resistivity silicon on insulator is described.The antenna is composed of a coplanar waveguide transmission line and the radiating slots. The slot antenna is folded and short circuited at its edge to optimize the 50 Ω matching impedance process. Backside substrate metallization has b...
The performance of a 60 GHz interdigitated dipole antenna integrated on SOI is described. The SOI substrate effect has been compensated by the introduction of an interdigitated structure. Good dipole matching impedance at 60 GHz over a bandwidth of 8% is obtained. Backside substrate metallization has been used to improve the radiation properties. A...
La conception d'une antenne spirale intégrée sur SOI est décrite. L'impact de la structure d'alimentation de l'antenne spirale à double brin sur le coefficient de réflexion et le rapport axial est analysé. Un bon coefficient de réflexion avec une bande passante de 35 GHz à -10 dB et une bonne polarisation circulaire couvrant une intervalle d'angle...
![Figure I.3 Différents composants d'un émetteur/récepteur RF [I.129]](profile/Julien-Barakat/publication/282194363/figure/fig1/AS:959579466780672@1605792981430/Differents-composants-dun-emetteur-recepteur-RF-I129_Q320.jpg)
The emergent systems of “Smart dust” use networks of several hundreds of millimetre scaled devices. Each device integrates sensor and communication functions in order to be consulted by one or more transmitters.Regular progress in micro-technology and circuit's design accelerate the realization of compact devices containing one or more sensors, ana...
La réalisation d'objets intelligents de la taille du millimètre capables d'être sensibles à leur environnement, de réaliser des calculs pour traiter les données et de communiquer de façon autonome constitue une opportunité unique pour repenser l'interaction entre l'homme et son milieu environnant. Les systèmes émergeants de « Smart Dust» sont réali...
The performance of a dual-arm millimeter wave Archimedean spiral antenna integrated on SOI is described. The impact of the feeding structure on the return loss and the axial ratio is displayed. A good return loss with 35 GHz -10 dB bandwidth and good circular polarization over 120deg elevation angle independent on the azimuth angle (less than -5 dB...
This work presents the performance of 0.13 μm Silicon on insulator technology in the design of 60 GHz fully integrated antennas. Three different types of antennas are considered and designed in order to study their ability to radiate efficiently at this frequency using specific IC technology in order to obtain good matching and higher radiation eff...
This work presents the design of a 60 GHz fully integrated dipole antenna on 0.13 mum silicon on insulator (SOI) substrate. A conductor backed coplanar waveguide balun has been designed on the top level layer to assure compatibility with the test devices. The CBCPW balun is completely characterized on SOI substrate for subsequent de-embedding of th...
Dans ce papier, nous présentons la conception d’antennes millimétriques intégrées en technologie silicium sur isolant (SOI). La bande de fréquence située autour de 60 GHz, autorisant une largeur spectrale de 7 GHz, est une des solutions possibles pour l’intégration des dispositifs radiofréquences. En particulier, une antenne IFA planaire à 61 GHz i...
In this paper, we propose a 60 GHz Slot antenna integrated on 0.13(m Silicon on Insulator (SOI) substrate. The antenna is composed of a CPW transmission line and the radiating slots. The design was based on electromagnetic simulations made using the CST Microwave Studio software package. The antenna exhibits a return loss of –12dB at 60GHz with a b...
In this paper, we propose a 60 GHz fully integrated dipole antenna on 0.13 @m silicon on insulator (SOI) substrate, incorporating an interdigitated capacitor. An integrated balun has been designed on the top level layer to assure a compatibility with the test devices. The balun is completely characterized on SOI substrate for subsequent de-embeddin...
De nouveaux systèmes adaptés aux besoins de communication sans fils d’un réseau de micro capteurs intelligents sont présentés. Le projet SMART DUST comportant l’architecture et le fonctionnement de capteurs abandonnés et les réalisations micro-technologiques est analysé. Les performances de tels systèmes sont illustrées ensuite par le projet COTS d...
