Browsing by Author "Mouhouche, Faiza"

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Analysis of a printed X-Shaped monopole antenna
(IEEE, 2017) Dehmas, Mokrane; Hamza, A. A.; Challal, Mouloud; Benmahdjoub, I.; Azrar, A.; Djafri, K.; Mouhouche, Faiza
This paper presents a study of a printed X-shaped monopole antenna. The analysis has started from considering a strip fed conventional single band Rectangular Microstrip Antenna (RMSA) resonating at 2.45 GHz commonly used in WLAN applications. The antenna has been transformed to a monopole structure that has yielded a larger bandwidth. In the second part, triangular slots were introduced to the RMSA to obtain an X-shaped antenna and their effects were investigated. An X-shaped monopole structure presenting a bandwidth of 3.39 GHz (1.96-5.35 GHz) has been obtained. The analysis suggested a possibility of performing size reduction. This part resulted in a final X-shaped monopole printed structure with an enhanced bandwidth of 6.2 GHz (1.8-8.0 GHz) and a significant external size reduction of 55.48 %. The final antenna which can be used in various applications (WLAN, Wi-Fi, Wi-Max, LTE 4G, surveillance systems, medical imaging, etc.) has been fabricated and its reflection coefficient measured. Good agreement was noticed between the simulated and measured results.
Analysis of small microstrip patch antennas for mobile communication
(2010) Mouhouche, Faiza
This work presents the analysis and design of small microstrip patch antennas that can be used in mobile communication using Finite Difference Time Domain (FDTD) method. The formulation of the FDTD algorithm is described along with its fundamental properties. At the beginning, the method is applied to the arbitrary shaped patch; and the radio-electric properties of the considered microstrip patch antennas are formulated. The method is then applied to some known structure shapes working in high microwave frequency bands; the shapes include rectangular (dipole), annular-ring and semi-ring patches. Different feeding methods (Microstrip line feed and coaxial line feed) are used to energize the considered antennas. The input impedance (VSWR), the return loss, and the far field radiation patterns calculated with the aid of FDTD method and compared with the results obtained with the HFSS simulator. Due to the nature of the chosen method, a new shape of patch is designed and analyzed. The new structure is named Berber-Z patch antenna taken from “TIFINAGH” Berber alphabet. The obtained results are Validated the HFSS simulator
A compact ACS-fed tri-band microstrip monopole antenna for WLAN/WiMAX applications
(Advanced Electromagnetics, 2018) Djafri, Kahina; Challal, Mouloud; Dehmas, Mokrane; Mouhouche, Faiza; Aksas, Rabia
This paper proposes a novel small asymmetric coplanar strip (ACS) fed tri-band monopole antenna for WLAN and WiMAX applications. To tune and create multiple resonant frequencies, the exciting strip of monopole antenna is connected to two different arms which are a J-shaped directed toward the asymmetric ground plane and an open stub. The proposed monopole antenna with a total size of 14.6 x17.5 mm2 is fabricated and tested. The measured results indicate that the antenna has impedance bandwidths for 10-dB return loss reach about 500 MHz (2.01-2.52 GHz), 230 MHz (3.48-3.71 GHz) and 1.2GHz (5.59-6.72 GHz) which cover widely the 2.4/5.8 GHz WLAN bands and the 3.5GHz WiMAX band. The simulated radiation patterns of the proposed antenna at the three resonant frequencies have a dipole-like radiation pattern in both E-and H-Planes. The compact size, the simple structure and good radiation performances of the proposed antenna makes it well-suited forthe intended applications
A compact double-inverted Ω-shaped dual-band patch antenna for WLAN/WiMAX applications
(Frequenz : journal of RF-engineering and telecommunications, 2022) Djafri, Kahina; Mouhouche, Faiza; Dehmas, Mokrane; Challal, Mouloud
In this study, a new compact dual-band antenna with overall size of 11 × 14.46 × 1.6 mm3 has been designed, fabricated and tested. The proposed antenna consists of two inverted Ω-shaped strips loaded with two different comb structures. The fist comb of six elements connected to the first Ω-shaped radiating branch is used to decrease the second band lower cut-off frequency and cover the intended WLAN and WiMAX applications. In order to cover the 2.45 GHz WLAN band and further reduce the antenna dimensions, a second comb structure of 14 elements is attached to the upper radiating branch. The fabricated antenna covers the frequency bands from 2.42 to 2.6 GHz and from 4.25 to 6.77 GHz with a reflection coefficient of |S 11| ≤ −10 dB. The antenna shows an omnidirectional radiation pattern in the H-plane and a monopole-like radiation pattern in the E-plane. The measured results agree well with the simulated ones which indicate that the proposed antenna is suitable to be used in the WLAN/WiMAX applications
Compact dual band slotted triangular monopole antenna for RFID applications
(Wiley, 2017) Dehmas, Mokrane; Azrar, A.; Mouhouche, Faiza; Djafri, K.; Challal, Mouloud
Compact dual-band reject UWB monopole antenna using EBG structures
(IEEE, 2017) Mouhouche, Faiza; Azrar, A.; Dehmas, Mokrane; Djafri, K.
In this paper, a compact dual band notched UWB monopole antenna is presented for WiMAX and X-band satellite applications. Dual band rejection characteristics are achieved by engraving the complementary hexagonal spit ring metamaterial on the radiating element and two modified mushrooms-like EBG structure above the ground plane on the vicinity of feed line. The antenna prototype is fabricated and tested. A good agreement between the simulated and measured results. The radiation pattern and time domain of the proposed design are relatively stable
A compact superformula based ultra-wideband antenna shape with two notched bands
(wiley, 2018) Mouhouche, Faiza; Azrar, A.; Dehmas, Mokrane; Djafri, Kahina
In this paper, a compact superformula ultra‐wideband (UWB) monopole antenna with dual band notches is proposed. The developed structure achieves UWB performance as well as a compact size of 20 × 26 × 1.62 mm3. Furthermore, to avoid interferences with WiMAX and satellite communication systems, dual notched band is obtained by engraving two co‐directional triangular split ring defects on the radiating element. The simulated and measured results show that the proposed antenna has an impedance bandwidth extending from 3.05 to 20 GHz with dual notched bands at [5.15‐5.68 GHz], and [7.15‐7.65 GHz] used in WiMAX and satellite communication, respectively. The proposed design realizes omnidirectional radiation pattern in H‐plane, and a dipole‐like pattern in E‐plane. The antenna exhibits an acceptable gain in the whole UWB range except at notched bands.
Design a Compact UWB Monopole Antenna with Triple Band-Notched Characteristics Using EBG Structures
(2018) Mouhouche, Faiza; Azrar, A.; Dehmas, Mokrane; Djafri, K.
in this paper, a compact ultra-wideband (UWB)monopole antenna with triple band-notched characteris-tics is presented. These triple band rejections are pro-duced by inserting the Complementary Co-directionalSplit-Ring Resonator (CC.SRR) on the radiating elementfor WiMAX/WLAN (3.4–3.95 GHz/5.35–5.9 GHz) andElectromagnetic Band Gap (EBG) structure in the vicinityof transmission line for X-band satellite communications(6.7–7.7 GHz). The proposed antenna with a total size of18 × 20.9 × 1.63 mm3has been constructed and tested. Anequivalent RLC circuit model is proposed and investi-gated. The simulated and measured results show thatthe proposed antenna has an impedance bandwidth(VSWR < 2) extanding from 3.05 GHz to 14 GHz with triplenotched bands of [3.3–3.9 GHz], [5.25–5.86 GHz] and [6.7–7.7 GHz]. The triple band notched characteristics and thegood radiation patterns make the proposed antenna agood candidate for the UWB applications
Design and fabrication of a novel quadruple-Band monopole antenna using a U-DGS and open-Loop-Ring resonators
(2017) Boutejdar, Ahmed; Challal, Mouloud; Bennani, Saad Dosse; Mouhouche, Faiza; Djafri, Kahina
In this Article, a novel quadruple-band microstrip patch antenna is proposed for the systems operating at quad-band applications. The antenna structure is composed of modified rectangular patch antenna with a U-shaped defected ground structure (DGS) unit and two parasitic elements (open-loop-ring resonators) to serve as a coupling-bridge. The proposed antenna with a total size of 31×33 mm2 is fabricated and tested. The measured result indicates that the designed antenna has impedance bandwidths for 10 dB return loss reach about 180 MHz (4.4–4.58 GHz), 200 MHz (5.4–5.6 GHz), 1100 MHz (7.2–8.3 GHz), and 700 MHz (9.6–10.3 GHz), which meet the requirements of the wireless local area network (WLAN), worldwide interoperability for microwave access (WiMAX), C and X bands applications. Good agreement is obtained between measurement and simulation results
Dual band monopole antenna using metamaterials
(IEEE, 2017) Mouhouche, Faiza; Azrar, A.; Djafri, K.
Gain Enhancement of Monopole Antenna using AMC Surface
(Advanced Electromagnetics, 2018) Mouhouche, Faiza; Azrar, Arab; Dehmas, Mokrane; Djafer, Kahina
A CPW rectangular-ring antenna over an Artificial Magnetic Conductor (AMC) is presented in this work. The AMC is a designed as a dual-band structure having an array of unit cells and operates at 2.45GHz and 5.20 GHz. A CPW antenna uses this dual-band AMC structures as a back-plane. Performance comparison is carried out with and without incorporation of AMC. The simulated and measured results show that the combination of the AMC reflector and the antenna provide directional properties at both frequency bands. It has been found that the antenna gain increases by about 5 dB
Gain improvement of CPW-Fed monopole antenna over dual-band AMC structure
(IEEE, 2017) Mouhouche, Faiza; Azrar, A.; Dehmas, M.; Djafri, K.
A CPW rectangular-ring antenna over an Artificial Magnetic Conductor (AMC) is presented in this work. The AMC is designed as a dual-band structure having an array of unit cells and operates at 2.45GHz and 5.20 GHz. A CPW antenna uses this dual-band AMC structures as a back-plane. Performance comparison is carried out with and without the incorporation of AMC. The simulated and measured results show that the combination of the AMC reflector and the antenna provide directional properties at both frequency bands. It has been found that the antenna gain increases by about 5 dB
Insecticidal and Histological Effects of Extracts from Leaves of Juglans regia L. Against Sitophilus oryzae (Coleoptera: Curculionidae) Isolated from Soft Wheat in Post-harvest
(Springer Science and Business Media Deutschland GmbH, 2025) Bennacer, Amel; Sahir-Halouane, Fatma; Smaili, Oussama; Oukali, Zahia; Mouhouche, Faiza; Bennacer, Nour El Houda; Chaib, Ratiba; Kumar, Ramar Muhan
In Algeria, the cultivation of soft wheat (Triticum aestivum Linn.) plays a crucial role in the food chain. However, the crop faces a threat from Sitophilus oryzae (Coleoptera: Curculionidae), which causes substantial economic losses. This study aims to discover novel bioactive compounds derived from Juglans regia Linn., a walnut tree grown in Algeria, to combat S. oryzae. This study focuses on extraction, phytochemical characterization, insecticidal effect against S. oryzae adults, and histological impact. GCMS analysis of the petroleum ether (EPJ) and chloroform (CHJ) fractions indicated the presence of a diverse range of bioactive molecules, including myrtenal (1.17%), eugenol (46.17%), methyl ester (25.84%), lycophyll (5.16%), and hexadecane (1.22%), which are derived from terpenoids, phenols, and fatty acids. LCMS/MS analysis of the ethyl acetate (AEJ) and butanolic (BTJ) fractions identified compounds mainly associated with hydrocinnamic acids, flavonols, flavones, and naphtoquinones, such as 3-caffeoylquinic acid, epi-catechin isomer, kaempferol-3-glucoside, and hydro-juglone derivative. Furthermore, the efficacy of the five extracts (hydromethanolic extract and the four fractions) against S. oryzae adults was evaluated at 625, 315, and 75 µg/mL concentrations over 7 days. EPJ and BTJ demonstrated the highest effectiveness among these extracts, as indicated by their relatively low LC50, LC90, LT50, and LT90 values. These results highlight the potential of EPJ and BTJ, derived from walnut leaves, as biocontrol agents against S. oryzae. Histological analysis of the treated insects revealed significant alterations in various tissues compared to untreated adults. This research gives the first evidence that J. regia grown in Algeria is a promising biocontrol agent against pest beetles in stored soft wheat.
Miniaturized Concentric Hexagonal Fractal Rings Based Monopole Antenna for WLAN/WiMAX Application
(Scimago Journal & Country Rank, 2019) Djafri, Kahina; Challal, Mouloud; AKSAS, Rabia; Mouhouche, Faiza; Dehmas, Mokrane
In this paper a new antenna design technique is introduced in order to achieve tri-band operation as well as antenna miniaturization. The technique consists of using two concentric first-iterative hexagonal rings connected to each other as a radiating patch fed with a Y-shaped micro-strip line. The proposed antenna operates at three fre-quency bands to cover 2.4/5.8 GHz WLAN bands and 3.5/5.5 GHz WiMAX bands applications. The numerical analysis and simulation are carried out with CST MWS. The measured return losses of the proposed antenna show good performance and good agreement with the simulated ones. Consequently the proposed antenna with compact size of 9.7 mm x 17 mm x 1.63 mm is well suited for wire-less applications.
A miniaturized quad band hexagon patch antenna for GSM1800, C band and WiMAX applications
(2022) Mouhouche, Faiza; Djaf, Kahina; Dehmas, Mokrane; Chibane, Kahina; Ksentini, Safa
In this article, a miniaturized patch antenna using fractal DGS and SRR DMS for GSM1800, C band and WiMAX applications is presented and investigated. Antenna miniaturization and multiband are accomplished by employing a fractal loop on the DGS structure and a split ring resonator slot in the patch. The proposed radiator has a hexagonal shape that operates at 6.8 GHz. To achieve downsize of 20.58, 38.22, 55.14 and 72.75% an antenna is designed using DGS and DMS structures for quad-band application appearing at 1.85, 3.05, 4.2, and 5.4 GHz. Simulated and tested data are investigated. The prototype antenna has adequate advantages, with a simple structure, compact size, multiband, and uniform radiation patterns.
Quad-band microstrip patch antenna for WLAN/WIMAX/C/X applications
(IEEE, 2017) Challal, Mouloud; Mouhouche, Faiza; Djafri, Kahina; Boutejdar, Ahmed
This work proposes a novel quad-band microstrip patch antenna for wireless local area network (WLAN), worldwide interoperability for microwave access (WiMAX), C and X applications. It is composed of a modified rectangular patch antenna and two parasitic elements which are both printed on one side of a FR4 substrate, a ground plane on other side on which a U-shaped slot is etched. The proposed antenna, with a total size of 31×33 mm 2 , is fabricated and experimental results illustrate that the -10 dB impedance bandwidth can completely cover the 4.4-4.58 GHz, 5.4-5.6 GHz, 7.2-8.3 GHz and 9.6-10.3 GHz, applications. The simulation results are in good agreement with the measurement ones
Study and analysis of metamaterial antenna structures
(2019) Mouhouche, Faiza
This thesis is devoted to the design, study and implementation of metamaterial structures at microwave frequencies. The focus of this work is on investigating the possibility of using metamaterial structures to improve the performance of antennas operating at the microwave frequencies. Five types of metamaterial structures are presented. Initially, the parameters of the proposed metamaterial unit cell are extracted and then applied to the monopole antenna. The work is followed by designing a compact MIMO UWB antenna using Complementary metamaterial. After that, the design and implementation of periodic structures (EBG and AMC) on monopole antenna are investigated. At the end, the work deals with the application of Composite right/ left hand (CRLH) structures on monopole antenna for quad bands. All the designed structures are fabricated and the measurement results compare well with the simulated ones
Study of microstrip antenna using complimentary metamaterial etched in ground plane
(IEEE, 2015) Mouhouche, Faiza; Azrar, Arab; Djafri, Kahina