Saadi Adil | Moulay Ismail University, Meknes, Morocco (original) (raw)

Papers by Saadi Adil

The design of traditional microwave components is widely developed in the literature, but their o... more The design of traditional microwave components is widely developed in the literature, but their optimizations with conventional techniques suffer from the handicaps of exorbitant time computation, which hampers any technological developments because of the tedious task of their algorithms. In this paper, a Non-linear optimization technique recently developed based on the spatial mapping with a surrogate model is presented; it is an implicit space mapping. We formulate in detail the optimization implicit spatial mapping algorithm, this algorithm has been successfully applied to the optimization of a microstrip directional coupler with coupled lines in a frequency band leading to a small size component.

Microwave and Optical Technology Letters, 2022

The current study focuses on a non‐invasive microwave system based on a UWB antenna for blood glu... more The current study focuses on a non‐invasive microwave system based on a UWB antenna for blood glucose measurements in the frequency range of 1–4 GHz. Calculations of the minimal values of microwave reflection coefficient (S11 Min) corresponding to various blood glycemia, as well as comparisons to measured values using the Vector Network Analyzer Anritsu MS46121B, were the major findings of this study. The results were in good agreement, with a shift of less than 5%, demonstrating the effectiveness of our microwave method in detecting blood glycemia. To define an experimental approach between blood and dextrose solution, a comparative study in terms of slops in a linear approximation of both S11 Min and resonant frequency versus glucose concentration for the two mediums was interesting. The deviations in the results are less than 5% in the range of 1–2 GHz. However, it is not the case in the ranges of 2–3 GHz and 3–4 GHz since the two mediums show contrary behavior regarding S11 Min and resonant frequency. Consequently, D‐Solution might be used to simulate blood using our system for the investigation of glycemia only in the range of 1–2 GHz.

Indonesian Journal of Electrical Engineering and Informatics (IJEEI), 2020

This work presents a broadband power amplifier in S-band in microstrip technology. The proposed p... more This work presents a broadband power amplifier in S-band in microstrip technology. The proposed power amplifier is modeled with a single-stage architecture based on a field effect transistor ATF13786 of Agilent Technologies (hp) ®. The used transistor has been biased with transmission lines and it has been matched with networks in the form of λ/4 transformers filters at the input and at the output. This amplifier has been studied and optimized using the Advanced Design System (ADS ®) software. The simulation results of the output power and S parameters show excellent characteristics with a satisfactory gain greater than 10.9 dB, low reflections, a saturated output power of 16.4 dBm with a 1 dB compression point at an input power level of about 5 dBm, a maximum PAE of 25.3% and unconditional stability in the desired frequency band. The modeled amplifier can be integrated into mobile communications systems namely LTE mobile networks (2500 to 2690 MHz) and wireless networks using Wi-Fi protocol (2400 to 2485 MHz).

Advances in Intelligent Systems and Computing, 2020

European …, 2012

... Abdelrhani Nakheli Electrical Engineering Department, Ecole Supérieure de Technologie MoulayI... more ... Abdelrhani Nakheli Electrical Engineering Department, Ecole Supérieure de Technologie MoulayIsmail University, Meknes-Morocco Abstract ... This software is based on solving Maxwell's equations, using the finite element method FEM, in the frequency domain. The Page 2. ...

Advances in Science, Technology and Engineering Systems Journal, 2020

This paper presents a design optimization of a dual-band branch-line coupler with steppedimpedanc... more This paper presents a design optimization of a dual-band branch-line coupler with steppedimpedance-stub lines. This coupler operates over 5G NR frequency bands n5 and n2, developed by 3GPP for the 5G (fifth generation) mobile network, and these two bands are centered at 0.85 GHz and 1.9 GHz respectively. To achieve the design specifications an adjusted Tuning Space Mapping method is used. This method of optimization moves the hardship of optimization from high-fidelity electromagnetic models to low-fidelity tuning models. The simulated and measured results of this enhanced coupler show good dual-band performance at the two bands.

International Journal of Electrical and Computer Engineering (IJECE), 2019

This paper presents a candidate ultra wideband antenna for Ku-band wireless communications applic... more This paper presents a candidate ultra wideband antenna for Ku-band wireless communications applications, analyzed and optimized by the finite element method (FEM). This three-dimensional modeling was realized and compared with published antennas for validate the performances of the proposed antenna. Its design is based on the insertion of several symmetrical slots of different sizes on the ground plane of a mono-layer patch antenna to overcome the main limitation of the narrow bandwidth of patch antennas. The proposed antenna, made on an FR-4 epoxy mono-layer substrate with a defected ground plane (dielectric constant εr = 4,4, loss tangent tan δ = 0,02 and thickness hs = 1.6 mm). The simulated numerical results obtained are very satisfying; Bandwidth = 10.48 GHz from f1 = 9.34 GHz to f2 = 19.82 GHz, S11 =-34.17 dB, Voltage Stationary Wave Ratio VSWR = 1.04 , Gain = 6.27 dB.

2018 International Symposium on Advanced Electrical and Communication Technologies (ISAECT), 2018

Indium aluminum nitride / gallium nitride (InAIN/GaN) high-electron mobility transistors (HEMTs) ... more Indium aluminum nitride / gallium nitride (InAIN/GaN) high-electron mobility transistors (HEMTs) have demonstrated microwave power performance and have a high potential to be used in electronics power. The present work is dedicated to study the influence of the AIInN barrier thickness and the indium molar fraction on the properties of the AIInN / GaN heterojunction. We also tend to uncover the role of inserting an AIN interlayer at InAIN/GaN heterojunction. The addition of a thin AIN interlayer increases band gap discontinuity, which implies the increase of two dimensional electron gas confined in the quantum well. The electron mobility becomes more important with an optimized AIN interlayer.

Journal of Taibah University for Science, 2018

A new small high-gain wideband rectangular patch antenna is proposed in this paper. The antenna h... more A new small high-gain wideband rectangular patch antenna is proposed in this paper. The antenna has a simple structure where the dimensions are about 11 mm by 7 mm by 1.58 mm leading to a good bandwidth. The antenna structure is optimized and simulated using electromagnetic commercial software, and the measured bandwidth defined by return loss <−10 dB is 1.97 GHz from 10.94 to 12.91 GHz for simulated results and 2.75 GHz covering from 10.8 to 13.55 GHz for measured results using vector network analyser. The gain is up to 4.91 dBi with a good radiation pattern. The comparison between simulation and measurement results permits to validate the structure of the proposed antenna. The low expenses of this profile and its simple configuration allow for an easy fabrication process, with usability in many applications such as radar, satellite and wireless communication.

Proceedings of Sixth International Congress on Information and Communication Technology, 2021

IEEE Conference Proceedings, 2018

In this paper, we present the biological effects of the radio-frequency field, and the interactio... more In this paper, we present the biological effects of the radio-frequency field, and the interaction mode between RF and the tissue. The simulation of this interaction permitted to analysis the absorption of RF energy in the biological tissue. After we describe a the tech-nique to heat different sizes of tumors and instantaneous follow up of the thermal diffusion, by microwave applicators realized from coaxial monopole surrounded by an absorbing and thermal conductor dielectric material (ATCDM). The Finite Difference Time Domain method "FDTD" with Perfectly Matched Layers for absorbing boundary conditions is used to model the head, the cell phone, microwave applicator and the "ATCDM" material.

Annales des Télécommunications, 2004

The authors present a method for measuring the temperature-depth profile in a lossy material by a... more The authors present a method for measuring the temperature-depth profile in a lossy material by applying Kalman algorithm to radiometric signals. The method employs a corre-lation microwave radiometer. It uses both short-range weighting functions and the delay times of the ...

International Journal of Electrical and Computer Engineering (IJECE)

This paper is mainly dedicated to understand the phenomena governing the formation of two-dimensi... more This paper is mainly dedicated to understand the phenomena governing the formation of two-dimensional electron gas (2DEG) confined in the quantum well which hold the role of the channel in the high electron density transistors (HEMT) based on AlGaN / GaN heterojunction. The theory takes into account: the crystal structure, the spontaneous and piezoelectric polarization concept, the formation mechanism of two-dimensional electron gas at the AlGaN / GaN interface, the approximate resolution of the Poisson and Schrödinger equations to determine the density of Two-dimensional electron gas after the analytical formula of the current-voltage characteristic is established. Our study is also concerned with the dependence of the two-dimensional electron gas density on the following technological parameters: Aluminum molare fraction, AlGaN layer thickness and AlGaN layer doping, In order to control the influence of these parameters on the device performance. Finally, the current-voltage chara...