Time filter

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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 | Benaissa A.,of Settat Hassan 1 University | Bennis H.,of Settat Hassan 1ST University | And 2 more authors.
International Journal on Communications Antenna and Propagation | Year: 2015

This paper presents a novel structure of low pass filter designed by using microstrip technology. The proposed filter consists of a modified ring resonator with open stubs and two input/output feed lines. Based on series of optimization and a specific design method, a compact low pass filter with good electrical performances is obtained. In order to characterize the frequency response of the proposed filter, the simulations are carried out using two different solvers (ADS Agilent and CST-MWS). Furthermore, to validate the conception approach the circuit is manufactured and measured. The experimental results shows a wide attenuation band with a good rejection level up to 6 GHz, a cutoff frequency of 2.66 GHz and a reduced insertion loss level. In addition, a good agreement between the simulation and the measured results is achieved. © 2015 Praise Worthy Prize S.r.l. - All rights reserved.


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.


Al-Koukh A.,of Settat Hassan 1st University | Zbitou J.,of Settat Hassan 1st University | El Abdellaoui L.,of Settat Hassan 1st University | Ababssi N.,of Settat Hassan 1st University | And 3 more authors.
International Conference on Multimedia Computing and Systems -Proceedings | Year: 2014

In this paper a novel Multi-band planar antenna structure is presented for GSM 900, DCS 1800, 3G (UMTS 2000) and 4G (LTE Advanced) applications. The antenna is optimized and simulated by using CST Microwave studio, 3-dimentional full wave electromagnetic simulation software. This antenna structure has a partial ground that was optimized into simulation. After the achievement, we have tested and validated this multi-band antenna by using R&S VNA. © 2014 IEEE.


Yechou L.,INPT Institute National of Post and Telecommunications | Tribak A.,INPT Institute National of Post and Telecommunications | Kacim M.,INPT Institute National of Post and Telecommunications | Zbitou J.,of Settat Hassan 1ST University | Sanchez A.M.,University of Cantabria
Progress In Electromagnetics Research C | Year: 2016

This paper presents the design, simulation, fabrication and measurement of a wideband bandpass filter with wide stopband performance operating at 3.5GHz. The proposed filter consists of two parallel coupled lines (T-PCL) centred by T-inverted shape. The location of transmission zeros can be adjusted by varying the physical lengths of T-inverted shape to improve the filter selectivity. The wide bandwidth is achieved through enhanced coupling between the input and the parallel coupled lines. Due to the transmission zeros in the lower and upper stopbands, the filter exhibits good performance including an extremely wide stopband and sharp attenuations near the passband together with low insertion and good return losses in the passband. The filter performance is investigated numerically by using CST-MWS. Finally, the microstrip wideband BPF with minimum insertion losses 0.3 dB, centred at 3.5GHz with a 3-dB fraction bandwidth of 70% and four transmission zeros is implemented and verified experimentally. In addition, good agreement between the simulated and measured results is achieved. © 2011 EMW Publishing. All Rights Reserved.


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.


Yechou L.,Institute National of Post and Telecommunications INPT | Tribak A.,Institute National of Post and Telecommunications INPT | Mohamed K.,Institute National of Post and Telecommunications INPT | Zbitou J.,of Settat Hassan 1ST University | And 2 more authors.
International Journal of Microwave and Wireless Technologies | Year: 2016

This paper presents a wideband band-stop filter (BSF) structure designed by using planar technology. The proposed filter consists of a modified conventional band-stop structure with open stubs, inner T-inverted shape, and two input/output feed lines. Based on series of optimization and a specific design method, two compact filters with good electrical performance are obtained. In order to characterize the frequency response of the proposed filters, the performance is carried out numerically using two different solvers (Advanced Design System -Momentum and CST-MWS). Furthermore, in order to validate the conception approach, two circuits are designed, fabricated, and tested. Additionally, an equivalent circuit of the wideband BSF is built to estimate the electromagnetic simulation results for practical realization. The features of the design have a reduced size, wideband rejection, and higher insertion losses, which can be performed by adjusting the L-shaped stubs (23.25 × 2.2 mm2) toward the 50 Ω input and output ports. Two filters are designed, fabricated, and tested; one can be operated between an fractional bandwidth (FBW) of about 50% at a center frequency of 1.8 GHz, and the other can be switched from an FBW of 43.38% at a center frequency of 1.82 GHz. In addition, good agreement between the simulation and the measured results is achieved. The overall size of each filter is 43.4 × 34.5 mm2. Copyright © Cambridge University Press and the European Microwave Association 2016


Zahraoui I.,of Settat Hassan 1st University | Errkik A.,of Settat Hassan 1st University | Abdelmounim E.,of Settat Hassan 1st University | Bennis H.,of Settat Hassan 1st University | And 2 more authors.
International Journal on Communications Antenna and Propagation | Year: 2015

This article comes with a novel study on the design of a CPW-Fed multi bands planar antenna. This structure can be integrated easily with both passive and active elements and it is suitable to operate for GPS, UMTS and WiMAX bands. Its entire area is 70.4×45mm2 and it is printed on an FR-4 substrate and fed by a 50 Ohm coplanar line. Simulations show that the antenna has a good input impedance bandwidths for, S11<=-10 dB, covering the GPS, UMTS and WiMAX bands. The electrical performances of the antenna are investigated numerically by using Momentum integrated in ADS and CST Microwave Studio. A good agreement between simulation and measurement results was achieved. © 2015 Praise Worthy Prize S.r.l. - All rights reserved.


Sardi A.,of Settat Hassan 1st University | Zbitou J.,of Settat Hassan 1st University | Errkik A.,of Settat Hassan 1st University | Tajmouati A.,of Settat Hassan 1st University | And 2 more authors.
International Journal on Communications Antenna and Propagation | Year: 2015

This paper presents a novel dual band coupler design that can operate at two frequency bands. It is accomplished by modifying the length and impedance of the branch lines in the conventional structure. Open stubs are used to achieve dual band branch line coupler with compact size and improve the performances. The dimensions of a conventional BLC “Branch Line coupler” occupy large area, according to the length of the transmission line which is always g/4 of the operating frequency,  is so long at low frequencies. When we use open ended stubs the dimensions of the new BLC is reduced compared to the conventional design. The proposed model was shown to reduce the size of the dual-band BLC around 61% based on the proposed topology. It was designed and simulated using EM solver tools for both DCS and WIMAX systems. The final optimized microstrip coupler was fabricated and measured. The simulation and measurement results are in good agreements. © 2015 Praise Worthy Prize S.r.l. - All rights reserved.


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 | Mediavilla A.S.,University of Cantabria
International Journal of Microwave and Optical Technology | Year: 2016

In this paper, a star-shaped microstrip patch antenna with modified ground structure consisting of an F-shaped slot printed in the ground is presented. The purpose of this design is to achieve and validate this microstrip multiband antenna. The entire area of the proposed antenna is 50x50mm2 and is printed on an FR-4 substrate and fed by a 50 Ohm microstrip line. This antenna has been analyzed and simulated for the WLAN and WiMAX applications. Simulation results show that the antenna has a good matching input impedance bandwidths for, S11≤=-10 dB, covering the WLAN at 2.4/5.2 GHz and WiMAX at 3.5 GHz. Simulation has been done by using three different electromagnetic solvers for comparison CST-MW, Ansoft's HFSS and ADS. After the realization, we have tested and validated this antenna. The measurement results of the antenna present a good agreement with the numerical results. © 2016 IAMOT.

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