Publications Internationales

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Author: search.filters.author.Boutejdar, A.

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    Design of compact low pass filter with large reject band using open circuit stubs and two cascaded DGS-Quasi-triangular resonators
    (2013) Challal, Mouloud; Boutejdar, A.; Azrar, A.; Vanhoenacker-Janvie, D.
    This article investigates a quasitriangular of defected ground structure (DGS) for low-pass filters (LPFs) application. An equivalent RLC circuit model is presented and its corresponding designed and fabricated. The proposed LPF presents the advantages of small size, low insertion loss and ultrawide stopband with 20 dB attenuation from 4 GHz to > 20 GHz. The simulated results obtained by equivalent circuit model and full-wave electromagnet show good agreement with the measured ones. V C 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:122–127, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27260 parameters are as well extracted using the parametric relationships. The LPFs using the proposed DGS pattern combined with open stubs are
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    Compact microstrip low-pass filter design with ultra-wide reject band using a novel quarter-circle DGS shape
    (2012) Challal, Mouloud; Boutejdar, A.; Dehmas, Mokrane; Azrar, Arab; Omar, A.
    A novel quarter-circle defected ground structure shape is introduced in this paper to design and implement an ultra-wide reject band low-pass filter (LPF). Moreover, an equivalent circuit model (ECM) is presented. The proposed LPF has small size and, a low insertion loss and a return loss less than -20 dB. Also, a round -20 dB suppression level ranging from 4 GHz to more than 20 GHz is achieved. The simulated results obtained by ECM and full-wave EM show good agreement with the measured ones