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Hedi Sakli
Gabès University

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Short Biography

Hedi Sakli wasborn in Tunisia in 1966. He received the M.S. degree in High Frequency Communication Systems from Marne-La-Valley University, France, in 2002, a PhD degree in 2009 and an HDR degree in 2014 in telecommunications from the National Engineering School of Tunis, Tunis El Manar University, Tunisia. Since 2010 he has been assistant professor at the University of Gabes. In 2016 he was made Associate Professor at the same university. He is the author of more than 60 papers. His research interests include propagation in anisotropic media, ferrite and metamaterials, numerical methods in electromagnetics, FSS, antennas, 5G, connected objects, IA and sensor networks.

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Journal article
Published: 01 August 2021 in International Journal of Electrical and Computer Engineering (IJECE)
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This paper proposes a method for designing a new ultra wide band (UWB) multiple-input multiple-output (MIMO) antenna with two and four elements. First we presented an ultra-wide band antenna we studied these performances. Then, we studied the application of metamaterials to the design of MIMO antennas for miniaturization and the performance of antennas, in order to guarantee the proper functioning of the MIMO system with a much reduced separation distance between the radiating elements (λ/12), where the coupling can be very weak. The application of these circular double ring SRRs materials on the front plan of the antenna has contributed to the increasing of the antenna performance is studied in terms of S-Parameters, efficiency, diversity gain (DG), radiation properties and envelop correlation coefficient (ECC). It offers advantages such as the reduction of weight and congestion that is beneficial for their integration into satellite communications systems.

ACS Style

Chafai Abdelhamid; Hedi Sakli; Nizar Sakli. A four-element UWB MIMO antenna using SRRs for application in satellite communications. International Journal of Electrical and Computer Engineering (IJECE) 2021, 11, 3154 -3167.

AMA Style

Chafai Abdelhamid, Hedi Sakli, Nizar Sakli. A four-element UWB MIMO antenna using SRRs for application in satellite communications. International Journal of Electrical and Computer Engineering (IJECE). 2021; 11 (4):3154-3167.

Chicago/Turabian Style

Chafai Abdelhamid; Hedi Sakli; Nizar Sakli. 2021. "A four-element UWB MIMO antenna using SRRs for application in satellite communications." International Journal of Electrical and Computer Engineering (IJECE) 11, no. 4: 3154-3167.

Research article
Published: 15 July 2021 in Wireless Communications and Mobile Computing
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The emergence of new IoT applications in regional and remote areas has increased the need for a global IoT connectivity beyond existing terrestrial network coverage. However, in many cases, it is not economically viable to build a dedicated terrestrial network to cover these remote areas due to population sparsity and the lack of business case. In this paper, we propose a framework for designing a solar rectenna for IoT-over-satellite applications using nanosatellites. Utilizing such a framework will allow valuable radio spectrum resources to be shared between satellite and terrestrial users. Thus, the autonomous power supply of these objects becomes a big challenge. Indeed, the harvest of solar energy and the conversion of RF energy into electric voltage are a hot topic. Our contribution consists in offering a solar rectenna system to collect solar and RF energy as well as the radio frequency transmission. A parametric study is carried out to follow the influence on the performance of this system. A topology of rectifying circuits is proposed in the present work. The parametric study has shown that the efficiency RF/DC conversion can reach 23.2% for an input power of 5 dBm and a load resistance of 2 k Ω . To ensure the satellite communication of IoT-connected autonomous objects, this system is operated in the X or Ku band.

ACS Style

Chokri Baccouch; Chayma Bahhar; Hedi Sakli; Taoufik Aguili. Adaptive Ku-Band Solar Rectenna for Internet-of-Things- (IoT)-over-Satellite Applications. Wireless Communications and Mobile Computing 2021, 2021, 1 -12.

AMA Style

Chokri Baccouch, Chayma Bahhar, Hedi Sakli, Taoufik Aguili. Adaptive Ku-Band Solar Rectenna for Internet-of-Things- (IoT)-over-Satellite Applications. Wireless Communications and Mobile Computing. 2021; 2021 ():1-12.

Chicago/Turabian Style

Chokri Baccouch; Chayma Bahhar; Hedi Sakli; Taoufik Aguili. 2021. "Adaptive Ku-Band Solar Rectenna for Internet-of-Things- (IoT)-over-Satellite Applications." Wireless Communications and Mobile Computing 2021, no. : 1-12.

Research article
Published: 08 June 2021 in Wireless Communications and Mobile Computing
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In this paper, we propose a compact Multiple Input Multiple Output (MIMO) antenna system with high isolation for wireless applications in 5G connected devices. This MIMO antenna system with the size of 92 × 88 m m 2 consists of two elliptical antennas symmetrically arranged next to each other. Two decoupling methods which are neutralization and Defected Ground Structure (DGS) are applied to ensure diversity of the proposed MIMO antenna. The single and MIMO antennas are simulated and analyzed then fabricated and measured. A good agreement between measurements and simulations is obtained. These configurations, dedicated to covering the 3.4 GHz band -3.8 GHz, have shown very satisfactory performances more than -30 dB in terms of reduction of mutual coupling between the antennas constituting our system. MIMO diversity parameters, such as Envelope Correlation (ECC), Diversity Gain (DG), and total efficiency, are also studied for each proposed MIMO system. Thus, results demonstrate that our two proposed antenna configurations are very suitable for 5G MIMO applications.

ACS Style

Marwa Daghari; Chaker Essid; Hedi Sakli. Muli-UWB Antenna System Design for 5G Wireless Applications with Diversity. Wireless Communications and Mobile Computing 2021, 2021, 1 -18.

AMA Style

Marwa Daghari, Chaker Essid, Hedi Sakli. Muli-UWB Antenna System Design for 5G Wireless Applications with Diversity. Wireless Communications and Mobile Computing. 2021; 2021 ():1-18.

Chicago/Turabian Style

Marwa Daghari; Chaker Essid; Hedi Sakli. 2021. "Muli-UWB Antenna System Design for 5G Wireless Applications with Diversity." Wireless Communications and Mobile Computing 2021, no. : 1-18.

Journal article
Published: 24 May 2021 in Sustainability
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When integrating the Internet of Things (IoT) with Unmanned Aerial Vehicles (UAVs) occurred, tens of applications including smart agriculture have emerged to offer innovative solutions to modernize the farming sector. This paper aims to present a low-cost platform for comprehensive environmental parameter monitoring using flying IoT. This platform is deployed and tested in a real scenario on a farm in Medenine, Tunisia, in the period of March 2020 to March 2021. The experimental work fulfills the requirements of automated and real-time monitoring of the environmental parameters using both under- and aboveground sensors. These IoT sensors are on a farm collecting vast amounts of environmental data, where it is sent to ground gateways every 1 h, after which the obtained data is collected and transmitted by a drone to the cloud for storage and analysis every 12 h. This low-cost platform can help farmers, governmental, or manufacturers to predict environmental data over the geographically large farm field, which leads to enhancement in crop productivity and farm management in a cost-effective, and timely manner. Obtained experimental results infer that automated and human-made sets of actions can be applied and/or suggested, due to the innovative integration between IoT sensors with the drone. These smart actions help in precision agriculture, which, in turn, intensely boost crop productivity, saving natural resources.

ACS Style

Faris Almalki; Ben Soufiene; Saeed Alsamhi; Hedi Sakli. A Low-Cost Platform for Environmental Smart Farming Monitoring System Based on IoT and UAVs. Sustainability 2021, 13, 5908 .

AMA Style

Faris Almalki, Ben Soufiene, Saeed Alsamhi, Hedi Sakli. A Low-Cost Platform for Environmental Smart Farming Monitoring System Based on IoT and UAVs. Sustainability. 2021; 13 (11):5908.

Chicago/Turabian Style

Faris Almalki; Ben Soufiene; Saeed Alsamhi; Hedi Sakli. 2021. "A Low-Cost Platform for Environmental Smart Farming Monitoring System Based on IoT and UAVs." Sustainability 13, no. 11: 5908.

Research article
Published: 06 May 2021 in Journal of Healthcare Engineering
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Healthcare is one of the most promising domains for the application of Internet of Things- (IoT-) based technologies, where patients can use wearable or implanted medical sensors to measure medical parameters anywhere and anytime. The information collected by IoT devices can then be sent to the health care professionals, and physicians allow having a real-time access to patients’ data. However, besides limited batteries lifetime and computational power, there is spatio-temporal correlation, where unnecessary transmission of these redundant data has a significant impact on reducing energy consumption and reducing battery lifetime. Thus, this paper aims to propose a routing protocol to enhance energy-efficiency, which in turn prolongs the sensor lifetime. The proposed work is based on Energy Efficient Routing Protocol using Dual Prediction Model (EERP-DPM) for Healthcare using IoT, where Dual-Prediction Mechanism is used to reduce data transmission between sensor nodes and medical server if predictions match the readings or if the data are considered critical if it goes beyond the upper/lower limits of defined thresholds. The proposed system was developed and tested using MATLAB software and a hardware platform called “MySignals HW V2.” Both simulation and experimental results confirm that the proposed EERP-DPM protocol has been observed to be extremely successful compared to other existing routing protocols not only in terms of energy consumption and network lifetime but also in terms of guaranteeing reliability, throughput, and end-to-end delay.

ACS Style

Faris A. Almalki; Soufiene Ben Othman; Fahad A. Almalki; Hedi Sakli. EERP-DPM: Energy Efficient Routing Protocol Using Dual Prediction Model for Healthcare Using IoT. Journal of Healthcare Engineering 2021, 2021, 1 -15.

AMA Style

Faris A. Almalki, Soufiene Ben Othman, Fahad A. Almalki, Hedi Sakli. EERP-DPM: Energy Efficient Routing Protocol Using Dual Prediction Model for Healthcare Using IoT. Journal of Healthcare Engineering. 2021; 2021 ():1-15.

Chicago/Turabian Style

Faris A. Almalki; Soufiene Ben Othman; Fahad A. Almalki; Hedi Sakli. 2021. "EERP-DPM: Energy Efficient Routing Protocol Using Dual Prediction Model for Healthcare Using IoT." Journal of Healthcare Engineering 2021, no. : 1-15.

Journal article
Published: 18 March 2021 in Applied Sciences
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Featured Application: The method presented in this paper can be applied in medical computer systems for supporting medical diagnosis. Thoracic radiography (chest X-ray) is an inexpensive but effective and widely used medical imaging procedure. However, a lack of qualified radiologists severely limits the applicability of the technique. Even current Deep Learning-based approaches often require strong supervision, e.g., annotated bounding boxes, to train such systems, which is impossible to harvest on a large scale. In this work, we proposed the classification and prediction of lung pathologies of frontal thoracic X-rays using a modified model MobileNet V2. We considered using transfer learning with metadata leverage. We used the NIH Chest-Xray-14 database, and we did a comparison of performance of our approach to other state-of-the-art methods for pathology classification. The main comparison was by Area under the Receiver Operating Characteristic Curve (AUC) statistics and analyzed the differences between classifiers. Overall, we notice a considerable spread in the achieved result with an average AUC of 0.811 and an accuracy above 90%. We conclude that resampling the dataset gives a huge improvement to the model performance. In this work, we intended to create a model that is capable of being trained, and modified devices with low computing power because they can be implemented into smaller IoT devices.

ACS Style

Abdelbaki Souid; Nizar Sakli; Hedi Sakli. Classification and Predictions of Lung Diseases from Chest X-rays Using MobileNet V2. Applied Sciences 2021, 11, 2751 .

AMA Style

Abdelbaki Souid, Nizar Sakli, Hedi Sakli. Classification and Predictions of Lung Diseases from Chest X-rays Using MobileNet V2. Applied Sciences. 2021; 11 (6):2751.

Chicago/Turabian Style

Abdelbaki Souid; Nizar Sakli; Hedi Sakli. 2021. "Classification and Predictions of Lung Diseases from Chest X-rays Using MobileNet V2." Applied Sciences 11, no. 6: 2751.

Journal article
Published: 02 March 2021 in IEEE Access
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This paper presents a method for designing a new two-element ultra-wideband (UWB) multiple-input-multiple-output (MIMO) antenna. We propose the design of an ultra-wideband antenna has been proposed with a study of its properties. An isolation technique using well-designed metamaterials is presented to achieve the miniaturization and performance of the two antennas and ensure proper operation of the MIMO system with a very small spacing between radiating elements ( $\lambda $ /12) where $\lambda $ is the length waves in a vacuum. The metamaterials used considerably reduce the coupling of multi-antennas. The application of these materials called split-ring resonator (SRR) on the antenna patch plane has contributed to the increase in the performance of the antenna studied in terms of S parameters, multiplexing efficiency, diversity gain (DG), radiation properties and envelope correlation coefficient (ECC). This increases the transmission rate. This antenna system offers advantages such as reduction in weight and bulk, which facilitates its integration into a receiver, dedicated to 5G and connected objects.

ACS Style

Hedi Sakli; C. Abdelhamid; C. Essid; N. Sakli. Metamaterial-Based Antenna Performance Enhancement for MIMO System Applications. IEEE Access 2021, 9, 38546 -38556.

AMA Style

Hedi Sakli, C. Abdelhamid, C. Essid, N. Sakli. Metamaterial-Based Antenna Performance Enhancement for MIMO System Applications. IEEE Access. 2021; 9 ():38546-38556.

Chicago/Turabian Style

Hedi Sakli; C. Abdelhamid; C. Essid; N. Sakli. 2021. "Metamaterial-Based Antenna Performance Enhancement for MIMO System Applications." IEEE Access 9, no. : 38546-38556.

Journal article
Published: 17 February 2021 in Electronics
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This paper presents an extension of the formulation of wave propagation in transverse electric (TE) and transverse magnetic (TM) modes for the case of metallic cylindrical waveguides filled with longitudinally magnetized ferrite. The higher order modes were exploited. We externally controlled the cut-off frequency through the application of DC magnetic fields. The numerical results of dispersion diagrams for TE and TM modes were obtained and analyzed. We analyzed a waveguide antenna filled with partially magnetized ferrite using the mode matching (MM) technique based on the TE and TM modes. By using modal analysis, our approach considerably reduced the computation time compared to HFSS. Ferrites are important for various industrial applications, such as circulators, isolators, antennas and filters.

ACS Style

Hedi Sakli. Cylindrical Waveguide on Ferrite Substrate Controlled by Externally Applied Magnetic Field. Electronics 2021, 10, 474 .

AMA Style

Hedi Sakli. Cylindrical Waveguide on Ferrite Substrate Controlled by Externally Applied Magnetic Field. Electronics. 2021; 10 (4):474.

Chicago/Turabian Style

Hedi Sakli. 2021. "Cylindrical Waveguide on Ferrite Substrate Controlled by Externally Applied Magnetic Field." Electronics 10, no. 4: 474.

Book chapter
Published: 11 March 2020 in Waveguide Technologies in Photonics and Microwave Engineering [Working Title]
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In this chapter, we present an extension of the rigorous analysis of the propagation of electromagnetic waves in magnetic transverse (TM) and transverse electric (TE) modes in a metallic circular waveguide partially filled with anisotropic metamaterial. In our analysis, the design of waveguide filters with uniaxial discontinuities is based on the determination of the higher-order modes, which have been analyzed and exploited. Below the cutoff frequency, the back backward waves can propagate in an anisotropic material. The numerical results with our MATLAB code for TM and TE modes were compared to theoretical predictions. Good agreements have been obtained. We analyzed a waveguide filters filled with partially anisotropic metamaterial using the mode matching (MM) technique based on the Scattering Matrix Approach (SMA), which, from the decomposition of the modal fields (TE and TM modes), are used to determine the dispersion matrix and thus the characterization of a discontinuity in waveguide. We extended the application of MM technique to the anisotropic material. By using modal analysis, our approach has considerably reduced the computation time compared to High Frequency Structure Simulator (HFSS) software.

ACS Style

Hedi Sakli; Wyssem Fathallah. Rigorous Analysis of the Propagation in Metallic Circular Waveguide with Discontinuities Filled with Anisotropic Metamaterial. Waveguide Technologies in Photonics and Microwave Engineering [Working Title] 2020, 1 .

AMA Style

Hedi Sakli, Wyssem Fathallah. Rigorous Analysis of the Propagation in Metallic Circular Waveguide with Discontinuities Filled with Anisotropic Metamaterial. Waveguide Technologies in Photonics and Microwave Engineering [Working Title]. 2020; ():1.

Chicago/Turabian Style

Hedi Sakli; Wyssem Fathallah. 2020. "Rigorous Analysis of the Propagation in Metallic Circular Waveguide with Discontinuities Filled with Anisotropic Metamaterial." Waveguide Technologies in Photonics and Microwave Engineering [Working Title] , no. : 1.

Conference paper
Published: 02 August 2019 in Blockchain Technology and Innovations in Business Processes
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In this paper, we present a new Ultra Wide Band (UWB) rectangular patch antenna conception method. Antenna impedance and pass band are studied depending on the dimensions of the notches introduction on developed patch and its presented ground. Obtained bandwidth is between 3.3 GHz and 17.8 GHz. The maximum gain is under 3.5 dBi and 8.7 dBi depending on operating frequency. The suggested UWB antenna is characterized by simplicity of design and power supply, a very low cost and a relatively stable radiation pattern over a very wide range. In addition, a network of two UWB-MIMO antennas with a DGS (Defected Ground Structure) decoupling structure, which consists in creating a slot in the ground plane of two antennas, is proposed. This isolation structure represents a notch filter to minimize the effect between adjacent antennas. Compared to the UWB-MIMO network without DGS, the proposed antenna array not only maintains the performance of each antenna, that reduces the coupling of 25 dB at 5.4 GHz and 14 dB at 9.8 GHz and provides total isolation more than 15 dB in the bandwidth spectrum [3.3–17.8] GHz. Therefore, it is suitable for satellite communications in the C, X, and Ku bands.

ACS Style

Chafai Abdelhamid; Marwa Daghari; Chafaa Hamrouni; Hedi Sakli. UWB-MIMO Array Antennas with DGS Decoupling Structure. Blockchain Technology and Innovations in Business Processes 2019, 148 -155.

AMA Style

Chafai Abdelhamid, Marwa Daghari, Chafaa Hamrouni, Hedi Sakli. UWB-MIMO Array Antennas with DGS Decoupling Structure. Blockchain Technology and Innovations in Business Processes. 2019; ():148-155.

Chicago/Turabian Style

Chafai Abdelhamid; Marwa Daghari; Chafaa Hamrouni; Hedi Sakli. 2019. "UWB-MIMO Array Antennas with DGS Decoupling Structure." Blockchain Technology and Innovations in Business Processes , no. : 148-155.

Conference paper
Published: 02 August 2019 in Blockchain Technology and Innovations in Business Processes
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In this paper, an elliptical multi-antennas working at 3.5 GHz for possible future fifth-generation (5G) MIMO (Multiple-Input Multiple-Output) mobile communication system is presented. Firstly, the antenna unit was designed and simulated to be operating at 3.5 GHz. Then, a neutralization line technique was used in designing multi antennas to allow good isolation and reduce the mutual coupling between this antennas. Simulated results show that, over the entire frequency band of interest, the proposed configuration could attain good isolation and low correlations between antennas with only neutralization line technique. Compared to multi-antennas without neutralization line, the proposed structure reduces the coupling with 24 dB at 3.5 GHz.

ACS Style

Marwa Daghari; Chafai Abdelhamid; Hedi Sakli; Kamel Nafkha. High Isolation with Neutralization Technique for 5G-MIMO Elliptical Multi-antennas. Blockchain Technology and Innovations in Business Processes 2019, 124 -133.

AMA Style

Marwa Daghari, Chafai Abdelhamid, Hedi Sakli, Kamel Nafkha. High Isolation with Neutralization Technique for 5G-MIMO Elliptical Multi-antennas. Blockchain Technology and Innovations in Business Processes. 2019; ():124-133.

Chicago/Turabian Style

Marwa Daghari; Chafai Abdelhamid; Hedi Sakli; Kamel Nafkha. 2019. "High Isolation with Neutralization Technique for 5G-MIMO Elliptical Multi-antennas." Blockchain Technology and Innovations in Business Processes , no. : 124-133.

Conference paper
Published: 01 June 2019 in 2019 15th International Wireless Communications & Mobile Computing Conference (IWCMC)
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The patch antenna is a basic component of a radio transmission channel that is specified among the best receiver transmitting structures, because of it's low cost of assembly. The use of metamaterial structures, which has proved to be attractive in the electromagnetic field has created a neutralization effect making it possible to improve the insulation. In this article, we propose to use a technique of reducing the coupling in a MIMO antenna network that is very close to each other. These antennas are spaced 0.24λ part. We propose a patch antenna with a modified ground plane on a FR4 substrate of dimension (25×30×1.6mm 3 ). The bandwidth ranges from 3 to 20 GHz with a bandwidth of about 16 GHz (84.9%). The simulations show that the addition of the metamaterial increases the isolation between the antennas. This greatly increases the transmission rate. To increase the efficiency of this type of network, the approach which is based on the use of a linear chain formed of 4 SRRs (split ring resonator) cells composed of suspended meta-surfaces, is proposed as a solution and represents a filter frequency band rejector between antennas in the near field making it possible to improve insulation and total efficiencies.

ACS Style

Chafai Abdelhamid; Marwa Daghari; Hedi Sakli; Chafaa Hamrouni. A New UWB-MIMO Multi-Antennas With High Isolation For Satellite Communications. 2019 15th International Wireless Communications & Mobile Computing Conference (IWCMC) 2019, 152 -155.

AMA Style

Chafai Abdelhamid, Marwa Daghari, Hedi Sakli, Chafaa Hamrouni. A New UWB-MIMO Multi-Antennas With High Isolation For Satellite Communications. 2019 15th International Wireless Communications & Mobile Computing Conference (IWCMC). 2019; ():152-155.

Chicago/Turabian Style

Chafai Abdelhamid; Marwa Daghari; Hedi Sakli; Chafaa Hamrouni. 2019. "A New UWB-MIMO Multi-Antennas With High Isolation For Satellite Communications." 2019 15th International Wireless Communications & Mobile Computing Conference (IWCMC) , no. : 152-155.

Conference paper
Published: 01 June 2019 in 2019 15th International Wireless Communications & Mobile Computing Conference (IWCMC)
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In this paper, a miniaturized 2-D pass-band frequency selective surfaces (FSS) operating at 3.5 GHz resonant frequency has been presented. Compared to the operating wavelength in free space, the size of the proposed miniaturized element FSS (MEFSS) dimensions are <; λ 0 /8. Simulations results ensure that the designed array of 5×5 MEFSS can provide a first-order pass-band filter response with a wide bandwidth of 2.3 GHz. Moreover, this structure can demonstrate excellent resonance stability for both different polarization (Transverse Electric (TE), Transverse Magnetic (TM) mode) and different incident angles up to 45°.

ACS Style

Marwa Daghari; Chafai Abdelhamid; Hedi Sakli; Divitha Seetharamdoo. Design And Simulations Of Stable Pass-Band Filtering Response Using Miniaturized Element Frequency Selective Surface (MEFSS). 2019 15th International Wireless Communications & Mobile Computing Conference (IWCMC) 2019, 821 -825.

AMA Style

Marwa Daghari, Chafai Abdelhamid, Hedi Sakli, Divitha Seetharamdoo. Design And Simulations Of Stable Pass-Band Filtering Response Using Miniaturized Element Frequency Selective Surface (MEFSS). 2019 15th International Wireless Communications & Mobile Computing Conference (IWCMC). 2019; ():821-825.

Chicago/Turabian Style

Marwa Daghari; Chafai Abdelhamid; Hedi Sakli; Divitha Seetharamdoo. 2019. "Design And Simulations Of Stable Pass-Band Filtering Response Using Miniaturized Element Frequency Selective Surface (MEFSS)." 2019 15th International Wireless Communications & Mobile Computing Conference (IWCMC) , no. : 821-825.

Conference paper
Published: 01 July 2018 in 2018 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting
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Metamaterials are artificial materials tailored to mold the flow of waves. Selecting a metamaterial for practical application is dependent on its effective parameter which classifies it as being electric or magnetic. This paper presents a theory of characteristic modes based quantitative approach for classifying metamaterial unit cell by means of stored energy. The presented results are promising for systematic design approaches for association of metamaterial unit cell to antennas such as in the design of metamaterial-inspired antennas.

ACS Style

Chukwuka Ozuem; Divitha Seetharamdoo; M. Hassanein Rabah; Hedi Sakli. Methodology for Quantifying Metamaterial Stored Energy Using Theory of Characteristic Mode. 2018 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting 2018, 1121 -1122.

AMA Style

Chukwuka Ozuem, Divitha Seetharamdoo, M. Hassanein Rabah, Hedi Sakli. Methodology for Quantifying Metamaterial Stored Energy Using Theory of Characteristic Mode. 2018 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting. 2018; ():1121-1122.

Chicago/Turabian Style

Chukwuka Ozuem; Divitha Seetharamdoo; M. Hassanein Rabah; Hedi Sakli. 2018. "Methodology for Quantifying Metamaterial Stored Energy Using Theory of Characteristic Mode." 2018 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting , no. : 1121-1122.

Conference paper
Published: 01 January 2018 in 12th European Conference on Antennas and Propagation (EuCAP 2018)
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Inspec keywords: electromagnetic wave propagation; electromagnetic metamaterials; energy storage

ACS Style

C. Ozuem; D. Seetharamdoo; M.H. Rabah; Hedi Sakli. Stored Energy Evaluation of Metamaterials based on Theory of Characteristic Mode. 12th European Conference on Antennas and Propagation (EuCAP 2018) 2018, 1 .

AMA Style

C. Ozuem, D. Seetharamdoo, M.H. Rabah, Hedi Sakli. Stored Energy Evaluation of Metamaterials based on Theory of Characteristic Mode. 12th European Conference on Antennas and Propagation (EuCAP 2018). 2018; ():1.

Chicago/Turabian Style

C. Ozuem; D. Seetharamdoo; M.H. Rabah; Hedi Sakli. 2018. "Stored Energy Evaluation of Metamaterials based on Theory of Characteristic Mode." 12th European Conference on Antennas and Propagation (EuCAP 2018) , no. : 1.

Journal article
Published: 01 December 2017 in Advances in Science, Technology and Engineering Systems Journal
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ACS Style

Chokri Baccouch; Hedi Sakli; Dhaou Bouchouicha; Taoufik Aguili. Leaf-shaped solar cell antenna for Energy Harvesting and RF Transmission in ku-band. Advances in Science, Technology and Engineering Systems Journal 2017, 2, 130 -135.

AMA Style

Chokri Baccouch, Hedi Sakli, Dhaou Bouchouicha, Taoufik Aguili. Leaf-shaped solar cell antenna for Energy Harvesting and RF Transmission in ku-band. Advances in Science, Technology and Engineering Systems Journal. 2017; 2 (6):130-135.

Chicago/Turabian Style

Chokri Baccouch; Hedi Sakli; Dhaou Bouchouicha; Taoufik Aguili. 2017. "Leaf-shaped solar cell antenna for Energy Harvesting and RF Transmission in ku-band." Advances in Science, Technology and Engineering Systems Journal 2, no. 6: 130-135.

Conference paper
Published: 01 December 2017 in 2017 18th International Conference on Sciences and Techniques of Automatic Control and Computer Engineering (STA)
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This paper presents a Time Reversal (TR) algorithm, applied to localize multiple targets in Ultra Wide Band (UWB) using Finite Difference Time-Domain (FDTD) method. Based on some numerical simulations executed by the FDTD programs, it's shown the performance of the UWB-TR-FDTD proposed algorithm to detect multiple targets in homogeneous medium and also behind the wall. Among this research, the results illustrate and confirm the efficiency of the algorithm in radio-frequency sources detection both in the case of homogenous medium and through the wall.

ACS Style

Marwa Daghari; Kamel Nafkha; Hedi Sakli. Multiple ultra wide band sources localization with time reversal technique using FDTD. 2017 18th International Conference on Sciences and Techniques of Automatic Control and Computer Engineering (STA) 2017, 666 -669.

AMA Style

Marwa Daghari, Kamel Nafkha, Hedi Sakli. Multiple ultra wide band sources localization with time reversal technique using FDTD. 2017 18th International Conference on Sciences and Techniques of Automatic Control and Computer Engineering (STA). 2017; ():666-669.

Chicago/Turabian Style

Marwa Daghari; Kamel Nafkha; Hedi Sakli. 2017. "Multiple ultra wide band sources localization with time reversal technique using FDTD." 2017 18th International Conference on Sciences and Techniques of Automatic Control and Computer Engineering (STA) , no. : 666-669.

Proceedings article
Published: 01 May 2017 in 2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)
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With the increasing need for high through puts and the scarcity of available frequency, we propose in the research paper new solutions that meet these requirements. Ultra Wide Band (UWB) technology seems a very promising solution. we developed a new small circular modified Microstrip antenna design to lift the bandwidth lock while maintaining a valued performance properties quality. This new antenna consists of a circular microstrip antenna with ring slot inscribed in a patch resonator and a modified partial ground plane with slots to form a single wide bandwidth. Indeed, we studied the performance of a patch antenna made of FR4epoxy substrates (20 × 20 × 1.57). The bandwidths range from [3.6 GHz; 4.9 GHz] for a width of 1.3 GHz and a band of [9.7 GHz; 26.7 GHz] of 17 GHz and for frequencies above 27.9 GHz the bandwidth is of the order of 7.2 GHz. Antenna various simulations performance are carried out and obtained tests results are validated with requirements agreement.

ACS Style

Chafaa Hamrouni; Chafai Abdel Hamid; Hedi Sakli; Abdelnaceur Kachouri; Naceur Abdelkrim. Design of ring-shaped circular microstrip antenna for ULB application. 2017 Progress In Electromagnetics Research Symposium - Spring (PIERS) 2017, 180 -184.

AMA Style

Chafaa Hamrouni, Chafai Abdel Hamid, Hedi Sakli, Abdelnaceur Kachouri, Naceur Abdelkrim. Design of ring-shaped circular microstrip antenna for ULB application. 2017 Progress In Electromagnetics Research Symposium - Spring (PIERS). 2017; ():180-184.

Chicago/Turabian Style

Chafaa Hamrouni; Chafai Abdel Hamid; Hedi Sakli; Abdelnaceur Kachouri; Naceur Abdelkrim. 2017. "Design of ring-shaped circular microstrip antenna for ULB application." 2017 Progress In Electromagnetics Research Symposium - Spring (PIERS) , no. : 180-184.

Journal article
Published: 05 January 2017 in International Journal of Microwave and Wireless Technologies
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This paper presents an extension of the formulation of wave propagation in transverse electric (TE) and transverse magnetic (TM) modes in the case of metallic circular waveguides filled with anisotropic metamaterials. The determined higher-order modes have been analyzed and exploited to the design of filters. Among the particularities of anisotropic material, the backward waves can propagate below the cut-off frequency. The numerical results for TE and TM modes have been compared with theoretical predictions. Good agreements were obtained. We analyzed a periodic structure containing waveguides filled with anisotropic metamaterial using the mode-matching technique. By using modal analysis, our approach reduced considerably the computation time compared to HFSS.

ACS Style

Hedi Sakli; Mohamed Yahia; Wyssem Fathallah; Jun Wu Tao; Taoufik Aguili. Rigorous study of propagation in metallic circular waveguide filled with anisotropic metamaterial. International Journal of Microwave and Wireless Technologies 2017, 9, 805 -813.

AMA Style

Hedi Sakli, Mohamed Yahia, Wyssem Fathallah, Jun Wu Tao, Taoufik Aguili. Rigorous study of propagation in metallic circular waveguide filled with anisotropic metamaterial. International Journal of Microwave and Wireless Technologies. 2017; 9 (4):805-813.

Chicago/Turabian Style

Hedi Sakli; Mohamed Yahia; Wyssem Fathallah; Jun Wu Tao; Taoufik Aguili. 2017. "Rigorous study of propagation in metallic circular waveguide filled with anisotropic metamaterial." International Journal of Microwave and Wireless Technologies 9, no. 4: 805-813.

Journal article
Published: 31 December 2016 in International Journal on Communications Antenna and Propagation (IRECAP)
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ACS Style

Chokri Baccouch; Dhaou Bouchouicha; Hedi Sakli; Taoufik Aguili. Patch Antenna on a Solar Cell for Satellite Communications. International Journal on Communications Antenna and Propagation (IRECAP) 2016, 6, 348 .

AMA Style

Chokri Baccouch, Dhaou Bouchouicha, Hedi Sakli, Taoufik Aguili. Patch Antenna on a Solar Cell for Satellite Communications. International Journal on Communications Antenna and Propagation (IRECAP). 2016; 6 (6):348.

Chicago/Turabian Style

Chokri Baccouch; Dhaou Bouchouicha; Hedi Sakli; Taoufik Aguili. 2016. "Patch Antenna on a Solar Cell for Satellite Communications." International Journal on Communications Antenna and Propagation (IRECAP) 6, no. 6: 348.