Microwave group

Rabat, Morocco

Microwave group

Rabat, Morocco

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Ihamji M.,Hassan 1 University | Abdelmounim E.,Hassan 1 University | Zbitou J.,Hassan 1 University Settat | Bennis H.,Hassan 1 University Settat | Latrach M.,Microwave Group
SITA 2016 - 11th International Conference on Intelligent Systems: Theories and Applications | Year: 2016

This work presents the miniaturization of a single rectangular microstrip antenna at 2.45 GHz in the ISM 'Industrial Scientific and Medical' band by using the slots technique. This microstrip antenna has a CPW fed and designed for RFID reader system on FR4 substrate with dielectric constant of 4.4, and simulated performing CST Microwave Studio. The total area of the final circuit is 19 × 31 mm2. The validated antenna has a good matching input impedance range from 2.338 GHz to 2.573 GHz with a stable radiation pattern, a loss return of -40 dB, and a gain of 1.78 dBi. © 2016 IEEE.


Ihamji M.,Hassan 1St University | Abdelmounim E.,Hassan 1St University | Zbitou J.,Hassan 1St University | Bennis H.,Hassan 1St University | Latrach M.,Microwave Group
Proceedings - 2016 International Conference on Wireless Networks and Mobile Communications, WINCOM 2016: Green Communications and Networking | Year: 2016

This work presents the miniaturization of a single rectangular microstrip antenna at 2.45 GHz in the ISM 'Industrial Scientific and Medical' band by using the fractal technique. This microstrip antenna has A CPW fed and designed for RFID reader system on FR4 substrate with dielectric constant of 4.4, and simulated performing CST Microwave Studio. The total area of the final circuit is 21.22 × 32.05 mm2.The validated antenna has a good matching input impedance range from 2.304 GHz to 2.625 GHz with a stable radiation pattern, a loss return equal to-35.9 dB, and a gain of 2.2 dBi. © 2016 IEEE.


Hamraoui A.E.,Hassan 1st University | Abdelmounim E.H.,Hassan 1st University | Zbitou J.,Hassan 1st University | Bennis H.,Hassan 1st University | Latrach M.,Microwave Group
SITA 2016 - 11th International Conference on Intelligent Systems: Theories and Applications | Year: 2016

This paper presents a new dual-band microstrip slot antenna using two inverted L-shaped slots embedded on the radiating patch, suitable for Radio Frequency Identification (RFID) applications especially designed for RFID readers and it operates at 910 MHz and 2.45 GHz. This antenna is designed with a reasonable gain, low profile and low cost achievement. The simulation results carried out by ADS 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 48×47 mm2 and mounted on an FR4 substrate with dielectric permittivity constant 4.4, thickness of 1.6 mm and loss tangent of 0.025. All simulation results of the resonant frequency, return loss, radiation patterns and fields distributions are presented. © 2016 IEEE.


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.


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.

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