H. Bennis

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echchakhaoui khalifa

Faculté des sciences et techniques settat

Abdelmou Hassan

International Journal of Electrical and Computer Engineering (IJECE)

Avago Technologies

Anna University

American International University-Bangladesh

Charles Akwuruoha

Michael Okpara University of Agriculture, Umudike, Abia State, Nigeria

Melad Olaimat

University of Waterloo

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Papers by H. Bennis

New Design Of A Broadband Microwave Zero Bias Power Limiter

In this paper a new design of a broadband microwave power limiter is presented and vali... more In this paper a new design of a broadband microwave power limiter is presented and validated into simulation by using ADS software (Advanced Design System) from Agilent technologies. The final circuit is built on microstrip lines by using identical Zero Bias Schottky diodes. The power limiter is designed by Associating 3 stages Schottky diodes. The obtained simulation results permit to validate this circuit with a threshold input power level of 0 dBm until a maximum input power of 30 dBm.

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A Novel Design of an H-shaped Microstrip Diplexer

Journal of Microwaves, Optoelectronics and Electromagnetic Applications, Dec 1, 2017

In this paper, a new microstrip diplexer using modified H-shaped resonators with a compact size a... more In this paper, a new microstrip diplexer using modified H-shaped resonators with a compact size and high isolation is presented. This circuit is designed for the ISM band at 2.4 GHz and GPS at 1.575 GHz. The proposed diplexer is formed by connecting two band-pass filters designed by using the modified H-shaped resonator and tapped microstrip Input/output (I/O) lines. An analytic study of the H-shaped resonator and an equivalent LC model of the proposed H-shaped band-pass filter were introduced. Two cross-slots are etched in the ground plane of the proposed microstrip diplexer in order to enhance its electrical performances and to set the pass bands at low frequencies. The circuit with defected ground structure is able to operate at the GPS L1 and L2 bands. The electrical performances of the diplexer are investigated numerically by using Momentum integrated in ADS from Agilent technologies and verified with another electromagnetic software CST microwave Studio.

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Fibre width measurement and quantification of filler size distribution in paper-based materials by SEM and image analysis

Journal of Electron Microscopy, 2009

In this paper the development of image processing and analysis routines for acquiring information... more In this paper the development of image processing and analysis routines for acquiring information about the paper structure from images obtained by scanning electron microscopy (SEM) is described. A new method to measure the fibre width based on the processing of superficial SEM observation is herein proposed and successfully applied to some commercial paper-based materials. The quantification of fillers in the Z-direction of paper was based on paper cross-sectional SEM images. The results obtained by image processing demonstrated the excellent performance and suitability of the proposed method to quantify exactly information concerning fraction and size distribution of digital fillers. The fraction of digital fillers was correlated with the surface roughness of a given paper grade.

Design Of A Novel Fractal Multiband Planar Antenna With A Cpw-Feed

This work presents a new planar multiband antenna based on fractal geometry. This struc... more This work presents a new planar multiband antenna based on fractal geometry. This structure is optimized and validated into simulation by using CST-MW Studio. To feed this antenna we have used a CPW line which makes it easy to be incorporated with integrated circuits. The simulation results presents a good matching input impedance and radiation pattern in the GSM band at 900 MHz and ISM band at 2.4 GHz. The final structure is a dual band fractal antenna with 70 x 70 mm² as a total area by using an FR4 substrate.

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A New Design of A Miniature RFID Tag Antenna for Metallic Objects

This paper presents a new design of passive UHF RFID tag antenna suitable for metallic objects. T... more This paper presents a new design of passive UHF RFID tag antenna suitable for metallic objects. The proposed antenna tag is based on a suspended patch with inserted slots in order to miniaturize the antenna size combined with a shorting strip inserted in parallel with the feeding port which permits to achieve the impedance matching. The performances of the proposed tag antenna are evaluated and analyzed based on gain, return loss, matching input impedance and read range and carried out by ADS from Agilent technologies and CST Microwave Studio electromagnetic solvers. This antenna has a total area of 74x28mm2 and mounted on a FR4 substrate with a constant dielectric permittivity, equal to 4.4, a thickness of 0.5mm and a loss tangent of 0.025.The simulated bandwidth at the UHF RFID band is about 28MHz, which covers the North and South American UHF RFID band (902-928MHz). The gain obtained into simulation of this antenna is 1.6 dB at 915MHz and the simulated read range is 5.7m.

$Research paper thumbnail of Multiband fractal CPW antenna for GPS, WiMAX and IMT applications$

Multiband fractal CPW antenna for GPS, WiMAX and IMT applications

This paper presents a new design of a fractal multiband antenna structure fed by coplanar wavegui... more This paper presents a new design of a fractal multiband antenna structure fed by coplanar waveguide (CPW) transmission line. The proposed antenna is optimized by using CST-MW studio. The final validated circuit is designed to operate in the Global Positioning System (GPS 1.57), Worldwide Interoperability for Microwave Access (WiMAX 2.5 – 2.69 / 3.30 – 3.80), and Advanced System of forth generation mobile communication (IMT 3.40 – 4.20 GHZ). Manifestly, it has been found that the radiation patterns of the presented antenna are still similarly to the bidirectional radiation pattern. The properties of the antennas, for instance, return losses and radiation patterns are validated into simulation by using two electromagnetic simulators HFSS and CST-MW Studio.

A New Design of a Miniature L-slot Microstrip Antenna for RFID Tag

This paper presents the miniaturization of a single microstrip antenna at 2.45 GHz in the ISM &qu... more This paper presents the miniaturization of a single microstrip antenna at 2.45 GHz in the ISM "Industrial Scientific and Medical". This microstrip antenna, using the slot technique, is designed for RFID tag system on FR4 substrate with dielectric constant of 4.4, and simulated performing CST Microwave Studio. The total area of the final circuit is 23 x 37.83 mm2. The validated antenna has a good matching input impedance range from 2.428 GHz to 2.472 GHz with a stable radiation pattern, a loss return of -36.45 dB, a directivity of 1.89 dB, and a gain of 1.02 dBi.

A New Compact Rectangular Planar Antenna for THz Applications

In this paper, we have proposed a new compact and miniaturized Coplanar Waveguide Microstrip Rect... more In this paper, we have proposed a new compact and miniaturized Coplanar Waveguide Microstrip Rectangular Patch Antenna for THz applications. The proposed antenna is implemented on a high dielectric constant substrate which is based on GaAs composed of two different layers and was optimized, studied and miniaturized by using the software ADS "Advanced Design System". The design of this antenna as part of the development of methods for the detection of broadband THz radiation pulses that can be contained in portable systems used in the detection of cancers.

$Research paper thumbnail of A low cost fractal CPW fed antenna for UWB applications with a circular radiating patch$

A low cost fractal CPW fed antenna for UWB applications with a circular radiating patch

TELKOMNIKA (Telecommunication Computing Electronics and Control)

In this study a validated antenna into simulation and through measurement has been described and ... more In this study a validated antenna into simulation and through measurement has been described and analyzed. The coplanar waveguide (CPW) technique has been chosen to feed the radiating patch while the two ground planes have been partially designed in the top side of the substrate. The fractal geometry, applied to the circular radiator, has been obtained by merging the circular and rectangular shapes. The fiberglass FR-4, with a single side of 35μm copper thickness, has been used to achieve the antenna material with a permittivity of 4.4, a thickness of 1.6 mm, a loss tangent of 0.025 and an overall dimension of 34x43 mm 2 . The proposed CPW fractal antenna has been configured to operate in the frequency range 3.1-10.6 GHz published by the federal communications commission (FCC) as an ultra-wide band (UWB). To calculate the return loss, the gain, the current density and the radiation pattern of the simulated antenna, two electromagnetic solvers have been involved which are the CST microwave studio and ADS. The series of measurement have been performed by using the network analyzer and the anechoic chamber in order to confirm the computed antenna.

A new compact CPW-fed dual-band monopole antenna for RFID applications

2016 5th International Conference on Multimedia Computing and Systems (ICMCS), 2016

This paper presents a study of a new dual-band monopole antenna fed by a Coplanar Waveguide (CPW)... more This paper presents a study of a new dual-band monopole antenna fed by a Coplanar Waveguide (CPW) line suitable for Radio Frequency Identification (RFID) applications especially designed for RFID readers and covering free ISM bands of 2.45GHz and 5.8GHz. The proposed antenna benefits from the advantages of the CPW line to simplify the structure of the antenna into a single metallic level, by consequent making it easier for integration with microwave integrated circuits. The simulation of the antenna was carried out using ADS from Agilent technologies and CST Microwave Studio electromagnetic solvers. A good impedance bandwidth of 500MHz is achieved in measurement (from 2.1GHz to 2.6GHz for the lower band), while the upper band covers 800MHz (from 5.2GHz to 6GHz). Details of the proposed antenna design and both simulated and experimental results are described and discussed.

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A new design of a compact CPW-Fed dual-band printed antenna for RFID applications

2015 International Conference on Wireless Networks and Mobile Communications (WINCOM), 2015

This paper presents a novel dual-band monopole antenna fed by a Coplanar Waveguide (CPW) line sui... more This paper presents a novel dual-band monopole antenna fed by a Coplanar Waveguide (CPW) line suitable for Radio Frequency Identification (RFID) applications especially designed for RFID readers and it operates at 2.45 GHz and 5.8 GHz. This antenna is designed with a reasonable gain, low profile and low cost achievement. The proposed antenna benefits from the advantages of the CPW line to simplify the structure of the antenna into a single metallic level, by consequent making it easier for integration with microwave integrated circuits. The simulation results carried out by ADS from Agilent technologies and CST Microwave Studio electromagnetic solvers, demonstrate that we have good performances in term of return loss, gain, radiation pattern and efficiency for the desired frequency bands. This antenna has a total area of 38×30.6mm2 and mounted on an FR4 substrate with dielectric permittivity constant 4.4, thickness of 1.6mm and loss tangent of 0.025. The gain obtained into simulation of this antenna is 1,9 dB at 2.45GHz and 4.7 dB at 5.8 GHz.

$Research paper thumbnail of A novel low cost fractal antenna structure for UWB applications$

A novel low cost fractal antenna structure for UWB applications

2015 1st URSI Atlantic Radio Science Conference (URSI AT-RASC), 2015

This study presents a new printed antenna designed by using the fractal geometry based on the ass... more This study presents a new printed antenna designed by using the fractal geometry based on the association between rectangular and circular shapes to obtain a new form iterated three times with reduced size. The CPW line (Coplanar Waveguide) has been used as feed line technique. The operation frequency range of the proposed antenna is between 3.1 and 10.6 GHz which is the frequency band of UWB (Ultra wideband) released by FCC (Federal Communication Commission).

Quantification of pore size distribution in the Z-direction of paper by using image analysis: Characterization of paper structure by image analysis

2010 5th International Symposium On I/V Communications and Mobile Network, 2010

In this work, image analysis techniques and scanning electron microscope are shown to be appropri... more In this work, image analysis techniques and scanning electron microscope are shown to be appropriated for the development of new reference approaches for analyzing fibrous materials such as paper. These techniques allow a non destructive characterization of analyzed artefacts by using images acquired by scanning electron microscopy (SEM). Particularly, a new method for quantifying pores in the Z-direction of paper is presented. The quantification is based on paper cross-sectional SEM images. The fraction and Z-distribution of pores were measured and related to optical and physical properties of paper. The fraction of pores was correlated with the surface roughness of some commercial paper based materials. The proposed method appears effective and gives reasonable results with respect to the quantification of pores in the paper structure. This method is expected to aid the efforts of papermakers to produce a paper structure for various end uses.

$Research paper thumbnail of A novel design of elliptic fractal multiband planar antenna for wireless applications$

A novel design of elliptic fractal multiband planar antenna for wireless applications

2015 1st URSI Atlantic Radio Science Conference (URSI AT-RASC), 2015

Microstrip Triangular Loop Resonator Duplexer

International Journal of Computer and Communication Engineering, 2013

In this paper, a new microstrip duplexer topology is presented for Digital Communication System (... more In this paper, a new microstrip duplexer topology is presented for Digital Communication System (DCS) at 1.8 GHz and for ISM Band at 2.45 GHz. A new approach for the design and the conception of the compact planar duplexer in microstrip technology is proposed. The suggested duplexer is based on two band pass filters (BPFs) using coupled microstrip triangular loop resonators. In this work Electromagnetic (EM) simulation with high meshing density and circuit modeling are achieved to meet some stringent performances concerning isolation, size, insertion loss and return loss.

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Microstrip Triangular Loop Resonator Duplexer

by A. Tribak, A. Chinig, and H. Bennis

International Journal of Computer and Communication Engineering, 2013

New Design of a Broadband Microwave Zero Bias Power

by Abdelmou Hassan, H. Bennis, and echchakhaoui khalifa

In this paper a new design of a broadband microwave power limiter is presented and validated into... more In this paper a new design of a broadband microwave power limiter is presented and validated into simulation by using ADS software (Advanced Design System) from Agilent technologies. The final circuit is built on microstrip lines by using identical Zero Bias Schottky diodes. The power limiter is designed by Associating 3 stages Schottky diodes. The obtained simulation results permit to validate this circuit with a threshold input power level of 0 dBm until a maximum input power of 30 dBm.