Rabat, Morocco
Rabat, Morocco

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Zahraoui I.,of Settat Hassan 1st University | Zbitou J.,of Settat Hassan 1st University | Errkik A.,of Settat Hassan 1st University | Abdelmounim E.,Laboratory of Settat Hassan 1st University | And 2 more authors.
Proceedings - 2015 3rd International Workshop on RFID and Adaptive Wireless Sensor Networks, RAWSN 2015 - In conjunction with the International Conference on NETworked sYStems, NETYS 2015 | Year: 2015

In this paper, a novel study on the design and analysis of a compact printed antenna for multi-band applications are presented. The structure of the entire area is 45×45.5 mm2 and is printed on an FR-4 epoxy substrate. It is suitable for GSM/GPS/PCS applications by using an M-shaped antenna which is formed of different arms and an L-shaped shorted strip connected between the feeding line and the ground plane. Simulation results of the antenna input impedance bandwidths for, S11 ≤ (-10) dB, show that it covers the GSM, GPS and PCS bands. Also, a stable radiation pattern and an average antenna directivity of 2.18 dBi across the operating bands have been obtained by using ADS" Advanced Design System". Also, we have conducted another study by using CST-MW to compare the results obtained with ADS which give good agreement between the both EM solvers. © 2015 IEEE.


Benriad F.,of Settat Hassan 1 University | Zbitou J.,of Settat Hassan 1ST University | Abboud B.,of Settat Hassan 1 University | Bennis H.,of Settat Hassan 1ST University | And 2 more authors.
International Journal of Microwave and Optical Technology | Year: 2016

In this paper, we will present the design and the fabrication of a new configuration of a microstrip low pass filter. The originality of this work is that the final proposed filter is miniature and presents good performances in term of insertion loss around -0.15dB and it has a wide stopband until 7 GHz. The design of such filter is based on the use of optimization and tuning methods integrated into two electromagnetic solvers ADS and CST-MWS. After the fabrication, the final LPF structure is tested which give a good agreement between simulation results for the both solvers and measurement responses. The proposed filter has a cutoff frequency of 2.33 GHz which makes it suitable for many standards like DCS Digital communication system, and UMTS Universal Mobile Telecommunications System bands. The final circuit presents an area of 20×20mm2. © 2016 IAMOT.


Chinig A.,of Settat Hassan 1st University Morocco | Errkik A.,of Settat Hassan 1st University Morocco | El Abdellaoui L.,of Settat Hassan 1st University Morocco | Tajmouati A.,of Settat Hassan 1st University Morocco | And 2 more authors.
Journal of Microwaves, Optoelectronics and Electromagnetic Applications | Year: 2016

In this paper a novel design of microstrip diplexer and triplexer using open loop resonators is presented. The proposed diplexer if formed by two band-pass filters for the Industrial Scientific Medical (ISM) applications at 5.8 GHz and the WIMAX applications (IEEE 802.16 WiMAX at 3.17 GHz to 4.2 GHz bands). The microstrip triplexer is designed for the Digital Communication System (DCS) at 1.8 GHz, WIMAX at 3.2 GHz and for the C-band at 4.4 GHz. Each device is formed by a set of filters with a matching network by using open loop resonators and a good arrangement of the transmission feed lines. Several parametric studies were achieved to study the influence of some critical parameters on the performances of the proposed circuits. The LC equivalent circuit of the band pass filter is examined and the values of its components are calculated. ADS Agilent and CST-MWS solvers are used to predict the electrical performances of the proposed circuits. The simulated frequency responses of these structures show good results with insertion losses around 2 dB, return losses better than 20 dB for all channels, and an isolation between all bands better than 20 dB. Besides, several transmission zeros are observed near the pass bands which enhance the selectivity and the isolation of the proposed devices. © 2016 SBMO/SBMag.


Benyetho T.,Hassan 1st University | Abdellaoui L.E.,Hassan 1st University | Tribak A.,Microwave Team | Zbitou J.,Hassan 1 University Settat | And 2 more authors.
Proceedings of 2015 IEEE International Renewable and Sustainable Energy Conference, IRSEC 2015 | Year: 2015

This paper presents a new multiband planar antenna array based on fractal geometry. This structure is validated in ISM band at 2.4 GHz and 5.8 GHz which makes it suitable for wireless power transmission applications. The return loss at the validated bands is around -18 dB. The radiation pattern shows wide aperture angles characteristics of 75° with a gain of 8 dBi at both bands. The antenna is designed on an FR4 substrate with 120 × 63 mm2 as dimensions, 4.4 as relative permittivity, 1.6 mm as height and 0.025 as loss tangent. © 2015 IEEE.


Aytouna F.,Abdelmalek Essaadi University | Zbitou J.,Hassan 1st University | Aghoutane M.,Abdelmalek Essaadi University | Touhami N.A.,Abdelmalek Essaadi University | And 2 more authors.
International Journal of Electrical and Computer Engineering | Year: 2016

In this work, we propose a novel design of a planar CPW lowpass "LPF" filter based on the use of periodic structures. The periodic cells are formed from a rectangular slot repeated periodically. The originality of this work is to develop a new LPF structure which is simple, low cost for fabrication and easy to associate with others microwave planar circuits. The proposed and validated LPF is a compact planar filter structure. The final circuit is simulated and optimized by using two electromagnetic solvers, advanced design system (ADS) and high frequency structural simulator (HFSS). After many series of optimization we have validated the final circuit into simulation by using optimization methods integrated into the both solvers, taking into account a high density of meshing in order to cover the whole circuit. The fabricated LPF circuit shows good agreement between simulation and measurement results in term of matching input impedance and insertion loss with a cut-off frequency of 1.25GHz. The entire area of the proposed LPF is 35x31 mm2. Copyright © 2016 Institute of Advanced Engineering and Science. All rights reserved.


Benyetho T.,Hassan 1st University | Zbitou J.,Hassan 1st University | El Abdellaoui L.,Hassan 1st University | Bennis H.,Hassan 1st University | And 2 more authors.
2015 1st URSI Atlantic Radio Science Conference, URSI AT-RASC 2015 | Year: 2015

The mobile phone applications had known an increase through the last years. Starting with GSM-900 on 1992, a mobile phone can today support the quad bands (850, 900, 1800 and 1900 MHz), Bluetooth, IMT-2000 (International Mobile Telecommunications), Wi-Fi (2.4 and 5 GHz), GPS, LTE (Long Term Evolution), ISM (Industrial, Scientific & Medical) bands (2.4 and 5.8 GHz) and NFC (Near Field Communication). These developments need antennas with a multiband behavior, small size and low cost of fabrication. © 2015 International Union of Radio Science (URSI).


Setti H.,Electronics and Instrumentation Group | Tribak A.,Microwave Group | El Hamichi A.,Electronics and Instrumentation Group | Zbitou J.,Laboratory FST of Settat Hassan 1st University Morocco
International Conference on Multimedia Computing and Systems -Proceedings | Year: 2014

A new microstrip diplexer for ISM and DCS Bands is presented in this paper. The proposed structure a microstrip diplexer using two hairpins filters, The first for the DCS-Band receiver, and the second for the ISM-Band transmitter, these types of filters are suitable for diplexers with two near frequencies. The two filters are connected to the same T-junction to form a multi-frequency diplexer operating in the frequency bands [1,74 GHz-2 GHz] and [2,3 GHz-2,55 GHz]. The small size compact designed diplexer exhibits very good performances with return losses better than 15dB, insertion losses in order of 0.2 dB as well as with a high level of isolation which is about 25 dB in Rx-band and higher than 25 dB in the Tx-band. © 2014 IEEE.


Hamraoui A.E.,Hassan 1st University | Abdelmounim E.H.,Hassan 1st University | Zbitou J.,Microwave Group | Bennis H.,Hassan 1st University | Latrach M.,Hassan 1st University
International Conference on Wireless Networks and Mobile Communications, WINCOM 2015 | Year: 2015

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. © 2015 IEEE.


Zahraoui I.,of Settat Hassan 1st University | Zbitou J.,of Settat Hassan 1st University | Errkik A.,of Settat Hassan 1st University | Abdelmounim E.,of Settat Hassan 1st University | And 3 more authors.
Lecture Notes in Electrical Engineering | Year: 2016

This work comes with a novel study on the design of a CPW-Fed multi band planar antenna. This structure can be integrated easily with passive and active elements. The antenna validated is suitable for GPS, UMTS and WiMAX bands. Its entire area is 70.4 × 45 mm2 and is printed on an FR-4 substrate. Simulation results show that the antenna has a good input impedance bandwidths for S11 ≤ −10 dB, covering the GPS, UMTS and WiMAX bands. This antenna is optimized, miniaturized and simulated by using ADS “Advanced Design System”, with a comparison with another software CST Microwave Studio. © Springer International Publishing Switzerland 2016.


Aytouna F.,Abdelmalek Essaadi University | Zbitou J.,Hassan 1st University | Aghoutane M.,Abdelmalek Essaadi University | Touhami N.A.,Abdelmalek Essaadi University | And 2 more authors.
Journal of Engineering Science and Technology Review | Year: 2015

In this paper, we introduce the design and the achievement of a Bandpass filter structure based on the use of rectangular slot cell. The originality of this work is to achieve a coplanar filter easy to integrate with microwave planar circuits and having a wide frequency bandwidth. The proposed bandpass filter is a low cost and compact planar filter structure. The final circuit is simulated by using two electromagnetic solvers, ADS and HFSS. The validation into simulation is based on using optimization methods integrated into the both solvers. Simulations have taken into account a high meshing density to cover the whole circuit. The fabricated bandpass filter has an area of 35X31mm2 and having a good insertion loss around -0.75dB in the bandwidth. The comparison between simulation and measurement results presents a good agreement. © 2015 Kavala Institute of Technology.

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