Amor Smida

Amor Smida
Majmaah University · Department of Medical Devices Technology

PhD, Assistant Professor

About

49
Publications
18,955
Reads
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663
Citations
Citations since 2017
34 Research Items
605 Citations
2017201820192020202120222023050100150200
2017201820192020202120222023050100150200
2017201820192020202120222023050100150200
2017201820192020202120222023050100150200
Additional affiliations
October 2014 - present
Majmaah University
Position
  • Professor (Assistant)
December 2012 - March 2013
Laval University
Position
  • Research Assistant
September 2010 - September 2014
University of Gafsa
Position
  • Research Assistant

Publications

Publications (49)
Preprint
Full-text available
FPGA is a hardware architecture based on a matrix of programmable and configurable logic circuits thanks to which a large number of functionalities inside the device can be modified using a hardware description language. These functionalities must often be secured especially when the context is sensitive (military, banking, medical, legal, etc.). I...
Article
Full-text available
LiDAR is a technology that uses lasers to measure the position of elements. Measuring the laser travel time and calculating the distance between the LiDAR and the surface requires the calculation of eigenvalues and eigenvectors of the convergence matrix. SVD algorithms have been proposed to solve an eigenvalue problem, which is computationally expe...
Article
Full-text available
Microwave (MW) ablation is a strong tool that has been used in clinical therapy for numerous cancer tumors. This method takes advantage of the heat from MW energy produced by an antenna to destroy cancer cells without causing damage to the healthy tissue. This technique's efficiency is correlated to the temperature reached during the MW process. Th...
Article
Full-text available
The design of a wideband circular-slot antenna for RF signal harvesting is reported in this work. The proposed design frequency range accommodates the leading contributors to the available RF signals accessible by the RFEH node. These widely utilized frequency bands comprise GSM1800, UMTS2100, Wi-Fi2.450, and LTE2600. The antenna geometry comprises...
Conference Paper
Full-text available
FPGA is a hardware architecture based on a matrix of programmable and configurable logic circuits thanks to which a large number of functionalities inside the device can be modified using a hardware description language. These functionalities must often be secured especially when the context is sensitive (military, banking, medical, legal, etc.). I...
Article
Full-text available
Installing and developing a sophisticated control system to optimize left ventricular assist device (LVAD) pump speed to meet changes in metabolic demand is essential for advancing LVAD technology. This paper aims to design and implement a physiological control method for LVAD pumps to provide optimal cardiac output. The method is designed to adjus...
Article
In this paper, a broadband RF-rectifier with a wide scale of RF input power levels, using FR-4 substrate, is proposed. A wideband resistance compression network (RCN) is applied to achieve the unique RF-rectifier design approach. The method improves the matching performance of the circuit over a broader range of the available input RF signals and f...
Article
Full-text available
The RFEH design challenges can be broadly classified into overall radio frequency direct current (RF-to-DC) power conversion efficiency (PCE), form factor, operational bandwidth (BW), and compactness. A detailed overview of the essential components of an RFEH system is presented in this paper. Various design approaches have been proposed for the re...
Article
Full-text available
High gain antennas are highly desirable for long-range wireless communication systems. In this paper, a compact, low profile, and high gain dielectric resonator antenna is proposed, fabricated, experimentally tested, and verified. The proposed antenna system has a cylindrical dielectric resonator antenna with a height of 9 mm and a radius of 6.35 m...
Article
This work presents a compact quad-band rectifier implemented using a multi-stub impedance matching network (IMN). The IMN comprises three blocks of multiple stub tuning connected via a meandered line (MDL) to achieve multiple frequency susceptance blocks. The proposed rectifier is designed to operate at (1.82 GHz, 2.1 GHz, 2.4 GHz, and 2.67 GHz) fo...
Article
Full-text available
In this paper, a long-range dual-band rectenna for harvesting ambient radio frequency (RF) energy from GSM/900 and GSM/1800 is presented. Theoretical analysis of the proposed dual-band impedance matching network (IMN) is conducted using a modified �–section matching network (MN). The RF-rectifier is integrated with a dual-band inverted-F monopole a...
Article
Full-text available
Abstract This study presents a simple and low‐profile cylindrical dielectric resonator antenna (CDRA) for the fifth‐generation (5G) band (3.5 GHz) with switchable polarization. The antenna can operate with linear or circular polarization (right‐handed circular polarization [RHCP] or left‐handed circular polarization [LHCP]) by changing the states o...
Article
Full-text available
This paper presents the design of a highly-tunable single-ended and balanced filter with improved upper stopband performance. The proposed filters are designed using a spurline and a U-shaped stepped impedance resonator (SIR) with a varactor diode connected to the open-circuited end. A spurline is introduced in both designs to achieve wide stopband...
Article
Full-text available
This paper presents a compact multi-band rectifier with an improved impedance matching bandwidth. It uses a combination of-matching network (MN) at Port-1, with a parallel connection of three cell branch MN at Port-2. The proposed impedance matching network (IMN) is adopted to reduce circuit complexity, to improve circuit performance, and power con...
Article
Full-text available
The purpose of this paper is to analyze the dielectric properties of La0.7Sr0.25K0.05MnO3 (LSKM) using impedance spectroscopy over the frequency range of 100 Hz to 1 MHz at different temperatures from 260 to 380 K. In fact, the dielectric analyses of the sample showed two relaxation processes at different relaxation times related to the effect of m...
Article
Full-text available
A microstrip feed line-based continuous frequency-tunable dual-band multiple-input multiple-output (MIMO) antenna is proposed in this article. The proposed antenna comprises four hook-shaped radiators placed orthogonally to one another. The overall dimensions of the antenna are 45 × 45 × 1.6 mm 3 (0.77λ g × 0.77λ g × 0.027λ g [where λ g is the guid...
Article
Full-text available
Introduction: Saudi Arabia has successfully reduced malaria cases to be constrained largely in the western regions. This study aimed to determine the epidemiological trends of malaria infection in five western regions of Saudi Arabia. Methodology: A retrospective analysis was conducted to investigate the epidemiological trends of malaria infecti...
Article
Full-text available
Multiple-input multiple-output (MIMO) scheme refers to the technology where more than one antenna is used for transmitting and receiving the information packets. It enhances the channel capacity without more power. The available space in the modern compact devices is limited and MIMO antenna elements need to be placed closely. The closely spaced an...
Article
Full-text available
This paper presents a miniaturized circularly polarized multiple-input multiple-output (MIMO) antenna for wearable biotelemetric devices. The proposed MIMO antenna consists of four elements, which are placed orthogonally to the adjacent elements. The proposed antenna has a wideband response 10-dB bandwidth of 2210 MHz (fractional bandwidth (FBW) =...
Article
Full-text available
This paper presents a wideband, low-profile and semi-flexible antenna for wearable biomedical telemetry applications. The antenna is designed on a semi-flexible material of RT/duroid 5880 (r = 2.2, tanδ = 0.0004) with an overall dimensions of 17 mm × 25 mm × 0.787 mm (0.2λ∘×0.29λ∘×0.009λ∘). A conventional rectangular patch is modified by adding rec...
Article
—A low-profile and efficient substrate integrated waveguide (SIW) based self-triplexing antenna for Worldwide InteroperabilityforMicrowaveAccess(WiMAX),fifth-generation (5G) and wireless LAN (WLAN) applications is proposed in this paper. The antenna consists of two SIW cavities, out of which one is embedded in the other. The outer SIW cavity is excite...
Article
Full-text available
In this paper, a dual-band pattern reconfigurable monopole antenna is designed and experimentally validated for C-band satellite communication systems and sensing UWB-radar applications. The proposed antenna has three resonances at 3 GHz, 7 GHz and, 8.5 GHz. In order to incorporate the reconfigurability, two switches are applied in the ground plane...
Article
Full-text available
A low-profile (0.21λ g × 0.35λ g × 0.02λ g) and a simply-structured frequency-switchable antenna with eight frequency choices is presented in this paper. The radiating structure (monopole) is printed on a 1.6-mm thicker, commercially-available substrate of FR-4 (r = 4.4, tanδ = 0.020). Specifically, it uses three PIN diodes in the designated places...
Article
Full-text available
This work propose the design and measurement of tunable, highly selective and wide-stopband microwave filters using substrate integrated waveguide (SIW) technology. A two pole filter is designed using optimized cavity parameters. Two higher order (4-pole) filters are designed by connecting two cavities vertically and horizontally through coupling s...
Article
Full-text available
A millimeter-wave (mm-Wave) multiple input multiple output (MIMO) antenna operating at 24 GHz (ISM band), suitable for wearable applications, is proposed in this paper. The proposed MIMO antenna consists of two elements, designed with an edge-to-edge distance of 5.14 mm, backed by a 5×5 cell electromagnetic bandgap (EBG) structure. The antenna is f...
Article
Full-text available
A printed and minimal size antenna having the functionality of frequency shifting as well as pattern reconfigurability is presented in this work. The antenna proposed in this work consists of three switches. Switch 1 is a lumped switch that controls the operating bands of the antenna. Switch 2 and Switch 3 controls the beam switching of the antenna...
Article
Full-text available
A minimally-sized, triple-notched band ultra-wideband (UWB) antenna, useful for many applications, is designed, analyzed, and experimentally validated in this paper. A modified maple leaf-shaped main radiating element with partial ground is used in the proposed design. An E-shaped resonator, meandered slot, and U-shaped slot are implemented in the...
Article
Full-text available
A compact, cylindrical dielectric resonator antenna (CDRA), using radio frequency signals to identify different liquids is proposed in this paper. The proposed CDRA sensor is excited by a rectangular slot through a 3-mm-wide microstrip line. The rectangular slot has been used to excite the CDRA for HEM 11 mode at 5.25 GHz. Circuit model values (cap...
Article
Full-text available
The RC4 (for Rivest Cipher 4) encryption algorithm appeared in 1987. Its designer is none other than Ronald Rivest, one of the three inventors of the RSA algorithm. This algorithm is distinguished by its great simplicity and speed of encryption. The details of the algorithm were kept secret until a description, probably obtained by reverse engineer...
Conference Paper
Full-text available
Microwave imaging for breast cancer detection is based on the contrast in the electrical properties of healthy fatty breast tissues. This paper presents an industrial, scientific and medical (ISM) bands comparative study of five microstrip patch antennas for microwave imaging at a frequency of 2.45 GHz. The choice of one antenna is made for an ante...
Conference Paper
In this paper, we study an electromagnetic optimization technique using Taguchi’s method and apply it to circular antenna array (CAA) design. Taguchi’s method was developed on the basis of the orthogonal array (OA) concept, which offers systematic and efficient characteristics. The newly proposed idea is the implementation of Taguchi optimization m...
Conference Paper
Full-text available
In this paper, we study an electromagnetic optimization technique using Taguchi’s method and apply it to concentric ring antenna array design. Taguchi’s method was developed on the basis of the orthogonal array (OA) concept, which offers systematic and efficient characteristics. The newly proposed idea is the implementation of Taguchi optimization...
Article
Full-text available
In this paper, an efficient method is presented to synthesize directive beam and multi-beam patterns. An optimal radiation pattern is obtained for a linear antenna array using Taguchi's Optimization method. A set of phase shift weights are generated in order to steer the beamforming towards any desired direction The results of Taguchi's method are...
Article
Full-text available
SUMMARY Phased antenna array design is one of the most important electromagnetic optimization problems. This research combined the Taguchi method and artificial intelligence methods, used them as the prediction tool in designing parameters for the communication system, and then constructed a set of the optimal parameter analysis flow and steps. In...
Article
Full-text available
This paper presents practical design of a smart antenna system based on direction-of-arrival estimation and Dolph–Chebyshev beam forming. Direction-of-arrival estimation is based on the multiple signal classification algorithm for identifying the directions of the source signals incident on the sensor array comprising the smart antenna system. The...
Conference Paper
Full-text available
In this paper we look to assess the efficiency of the control strategy of phase only, based onTaguchìs method when applied to Uniform Linear Array (ULA).The aim of this paper is to useTaguchìs method in the contribution of the main lobe optimization. Whith this method we settle phase excitations for each element of linear antenna array to move the...
Conference Paper
Full-text available
This paper presents a new approach to synthesize conformal cylindrical antenna arrays by controlling the phase excitation, to create a directive lobe usingtaguchìs method. The aim of our proposed method consists on the minimization of the fitness function between obtained and desired results. The results found, with the application of this method t...
Conference Paper
Full-text available
A 4 bits digital phase shifter is designed and simulated. It is based on 3-db hybrid coupler and totally twelve switches are used. The simulation results indicate an insertion loss better than -4dB, a return loss less than -20 dB and an error phase varied between 0.01° and 0.6° at 2.45 GHz. to achieve a 6 bits phase shifter, we increased the number...
Article
Full-text available
Adaptive array antenna technology is useful for detecting the Direction of Arrival (DOA) of signal and delay for mobile communications, where the antenna beam will automatically directed to the signal source. One method to estimate DOA and delay effectively is by using MUSIC (Multiple Signal Classification) algorithm. When the signal arrive at the...
Article
Full-text available
Adaptive array antenna technology is useful for detecting the Direction of Arrival (DOA) of signal and delay for mobile communications, where the antenna beam will automatically directed to the signal source. One method to estimate DOA and delay effectively is by using MUSIC (Multiple Signal Classification) algorithm. When the signal arrive at the...
Article
Full-text available
The synthesis of planar antenna array has many practical applications. In this paper, we have used the Taguchi’s method to synthesize and optimize radiation patterns. Numerical examples of planar arrays were presented in order to show the high efficiency of accomplishing the desired radiation pattern with using only the synthesis on phase. The resu...
Conference Paper
Full-text available
The objective of this paper is to present a beam synthesis technique for circular antenna array antennas with efficient tapering. This paper describes a Taguchi to synthesize circular antenna arrays controlled by the phase and amplitude excitation, to synthesize directive lobe. The advantage of Taguchi's optimization technique is the ability of sol...
Article
Full-text available
A new and very speedy synthesis method for linear array antennas with periodic element spacing is described. This study presents an efficient method for the pattern synthesis based on Taguchi’s method. A number of representative examples are presented to demonstrate the various unique capabilities of the method. A set of phase shift weights are gen...
Conference Paper
Full-text available
In this paper, an optimal radiation pattern is obtained for a linear antenna array using Taguchi's Optimization method. A set of phase shift weights are generated in order to steer the beam towards any desired direction. The fitness function is used to calculate the phase shift weights. The results of Taguchi's method are validated by using array a...
Conference Paper
Full-text available
This paper introduces the developed hardware platforms of the smart antenna transmitter system and its implementation details and presents the novel concept of smart antenna system which requires digital beamforming based on Taguchi Method. This paper investigates how the implementation on STM8 of the signal processing in hardware affects the perfo...
Article
Full-text available
This paper, presents the Taguchi’s method for the synthesis and design of antenna arrays with periodic element spacing.The objectives of this work are to minimize the maximum side lobe level (SLL) and perform null steering for isotropic linear antenna arrays parameter by controlling only amplitude parameter of the array elements. The yagi antenna a...

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Projects (2)
Project
- To design multi-elements MIMO Antennas
Project
In recent years, wireless communication systems have progressed greatly and the market, especially for the cellular phone, has witnessed explosive growth. Moreover, as the demand for multimedia services increases, a wider bandwidth of information will be required for next generation wireless systems. These systems will be allocated at a higher frequency band because a number of useful frequency bands have already been allotted to and are occupied by existing systems. In order to accommodate a larger number of subscribers and to provide better quality services, it is necessary to increase the channel capacity. Further, the technologies required for power saving and efficient frequency reusability will be necessary for various multimedia services. The efficient use of the frequency resources is necessary to achieve higher data transmission throughput. Smart antenna systems are capable of automatically changing the directionality of their radiation patterns in response to their signal environment. This can noticeably improve the performance 3 characteristics, such as channel capacity and quality of a wireless system. Smart antenna systems, by using spatially separated antennas, referred to as antenna array, maximize the Signal-to-Interference-plus-Noise Ratio (SINR) of the received signals, and suppress interferences and noise power by digital signal processing after analog to digital conversion. Conventional antenna systems, which employ a single antenna, radiate and receive information equally in all directions. This omni-directional radiation leads to the distribution of energy in all directions. This wasted power becomes a potential source of interference for other users or for other base stations in other cells. Interference and noise reduce the Signal-to-Noise Ratio (SNR) used for detection and demodulation, resulting in poor signal quality. Today’s cellular systems usually introduce 120o sectorization of the coverage to enhance capacity. In my interest research, a novel design of phased antenna array based on digital beamforming is proposed. The goal of the design is to construct smart antenna beamforming systems with hardware-software implemented neural network and Taguchi method. A newly proposed synthesis method is used to design antenna arrays capable of delivering a much better radiation performance in terms of homogenous coverage and reduced interference with phased arrays and capable to beamforming and electronic steering by adjusting the relative phases of the signal received or transmitted by each antenna.