Publications Scientifiques

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Author: search.filters.author.Fertas, FouadHas files: Yes

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    A Bandpass Filter with Triple-Narrow Notch Bands Based on Metamaterials SRR Configurations for UWB Applications
    (nternational Academy of Microwave and Optical Technology (IAMOT), 2024) Aissioui, Mohamed; Kendil, Djamel; Fertas, Khelil; Fertas, Fouad
    This paper presents a bandpass filter (BPF) with three narrow notched bands designed for ultra-wideband (UWB) applications. Initially, a basic UWB BPF is designed using a microstrip multimode resonator (MMR) with an open stepped impedance stub loaded at its center. Following that, the Split-Ring Resonator (SRR) is used to generate a triple narrow notched band, allowing undesired signals to be rejected. The frequency range is 2.81 GHz to 10.2 GHz. Beyond this range, there is a strong rejection. Notably, three narrowly notched bands at 5.29, 5.83, and 7.99 GHz are used to achieve in-band interference cancellation, with - 3dB fractional bandwidths of 2.64%, 2.91%, and 1.77%, and rejection levels of -17.15 dB, -11.65 dB, and -11.56 dB, respectively. This filter simultaneously has three main advantages: it is simple, rejects unwanted signals within the bandwidth without affecting the adjacent signals, and achieved high selectivity, the simulation and measurement results show a good agreement, demonstrating effective filtering performance, with a compact dimension of 25.9 x 13.7 mm2.
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    Development of non-conventional super-UWB antenna based on genetic algorithm optimization
    (Institute of Electrical and Electronics Engineers Inc, 2023) Fertas, Khelil; Fertas, Fouad; Maamria, Tarek
    This paper presents, an improved applied approach using genetic algorithm optimization for super-ultra wide band antenna. The intended antenna is optimized to operate from 2.8 GHz to more than 40 GHz and suggested for UWB wireless communications include 5G applications. Improving the impedance bandwidth is achieved by optimizing appropriate non-conventional defected ground structure (DGS) filter. The optimized non-conventional filter consists of a matrix of rectangular shapes where each one is allocated by either conducting or non-conducting property. The process is based in a code developed using visual basic script of CST microwave studio. Additionally, the optimized form can be automatically achieved without designer intervention. The simulated results for reflexion coefficient, current distribution, radiation pattern and gain are presented and discussed
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    Reconfigurable UWB monopole antenna with WLAN Band-Notch characteristic
    (Institute of Electrical and Electronics Engineers Inc, 2023) Fertas, Khelil; Fertas, Fouad; Challal, Mouloud
    this paper presents a reconfigurable WLAN stopband UWB-monopole antenna with an inverted II-shaped slot embedded at the lower part of the ground plane, and a PIN diode. The proposed antenna has the capability to work in the frequency range of 3.1-10.6 GHz with and without notched-band. To achieve the reconfigurability of a rejected band, a PIN diode is inserted in the middle length of inverted II-shaped slot. The ON/OFF states of the PIN diode can change the antenna performance. The presented antenna is designed on Teflon substrate of dielectric constant 2.5 with loss tangent of 0.002. Good performance regarding reflection coefficient, gain and radiation patterns are presented and discussed
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    Multi-L slots antenna for multiband applications
    (IEEE, 2019) Fertas, Fouad; Challal, Mouloud; Fertas, Khelil
    This research paper present a multi-L shaped slots antenna (MLSSA) for multiband operation, the aim of this study is to design small and simple profile antenna that can operate in multiband frequency, the proposed antenna contain a rectangle microstrip patch with a small overall size of 27.4×24 mm 2 and a transmission line with 50 Ω coplanar waveguide (CPW), the bands characteristics are realized by introducing a six of L-shaped slots in radiating element, the prototype and proposed antenna have been constructed and experimentally studied. The measured S11 shows a good agreement with the simulated one, thereby the antenna respond at five frequency bands which are (2.36-2.58 GHz), (3.07-4.01 GHz), (4.25-5.27 GHz), (5.9-6.29 GHz) and (7.01-S.l GHz) to meet requirements for WILAN (5.15-5.S75 GHz), WIMAX (3.3-3.7 GHz), LTE band (3.2-3.3 GHz) applications
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    Design and implementation of a miniaturized CPW-Fed microstrip antenna for triple-band applications
    (IEEE, 2017) Fertas, Fouad; Challal, Mouloud; Fertas, Khelil
    In this paper, a novel and low profile CPW-Fed triple-band microstrip antenna for wireless applications is proposed. The proposed antenna is implemented on FR4-Epoxy dielectric substrate with dimensions of 24×40 mm 2 and generates three desired resonant frequencies at about 2.44 GHz, 3.56 GHz and 5-6 GHz for WLAN and WiMAX applications. Numerical results for the return loss and 2D radiation patterns of the antenna are presented. Good agreement between measured and simulated results is achieved. The obtained results represent that the proposed antenna with good performances can be suitable for various applications such as future developed technologies and handheld devices
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    A Compact Slot-Antenna with Tunable-Frequency for WLAN,WiMAX, LTE, and X-Band Applications
    (2020) Fertas, Fouad; Challal, Mouloud; Fertas, Khelil
    In this paper, a new monopole compact antenna with tunable frequency fed by a coplanarwaveguide (CPW) for WiMAX, WLAN, LTE bands, and X-band satellite communication system ispresented. This is achieved by adequate combination of a new radiating patch element along with slotsand switches. The simulation and measurement results show that depending on ON/OFF states, theproposed reconfigurable antenna, printed on an FR4 substrate, can operate in four applicable frequencybands, i.e., [2.37–2.75 GHz], [3.15–4.08 GHz], [4.48–5.92 GHz], and [6.69–8.31 GHz]. Very interestingresults for the reflection coefficient, current distribution, and radiation pattern of the antenna arepresented and discussed. The measured results are in good agreement with the simulated ones
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    Design and Implementation of a Multiband Quasi-Yagi Antenna
    (IEEE, 2019) Fertas, Fouad; Challal, Mouloud; FERTAS, Khelil
    In this paper, a coplanar waveguide-fed planar monopole antenna for multiband operations is presented. The antenna consisting of a multistrip Quasi-Yagi element and a coplanar waveguide to coplanar slot fed line, and the electric fields at the coplanar slot line can be excited through the CPW feed line. The proposed antenna can be used in multiband operations with directional radiation patterns. It generate four resonant frequency bands determined by -10dB reflection coefficient, it can cover number useful wireless communication systems; the structure plan of the antenna facilitates its integration with the other circuit components