M. Challal, M. Dehmas, A. Azrar, R. Aksas and M. Trabelsi, “Circuit Modeling and EM Simulation Verification of DGS based Low-Pass Filter Employing Transmission Line Model along with Microstrip-Slotline Transitions, ” Journal of MATEC Web of Conferences - Chapter 1: Modeling and Simulation (accepted and presented article in 2016 International Conference on Design Engineering and Science – ICDES 2016, Kuala Lumpur, Malaysia), vol. 52, No. 01003, pp. 1–6, Apr. 2016. DOI: 10.1051/matecconf/20165201003, Publisher: EDP Sciences.

M. Challal, M. Dehmas, A. Azrar, R. Aksas and M. Trabelsi, “ Wide Stopband Microstrip Bandpass Filter Based on a Compact Slotted Ground Structure, ” ACTA Physica Polonica A, vol. 128, No. 2B, pp. B-71-B-72, Aug. 2015. DOI: 10.12693/APhysPolA.128.B-71, Publisher: Institute of Physics, Polish Academy of Sciences.

M. Challal, M. Dehmas, A. Azrar , R. Aksas and M. Trabelsi, “Novel Design of Miniaturized Broad Stopband Bandpass Filter using Defected Ground Structure, ” IJMOT-International Journal of Microwave and Optical Technology, vol. 9, No. 6, pp. 415-420, Nov. 2014. Website: http://www.ijmot.com/VOL9NO6.ASPX, Publisher: Electrical Engineering Department, University of Nevada

M. Challal, A. Boutejdar, M. Dehmas, A. Azrar and A. Omar “Compact Microstrip Low-Pass Filter Design with Ultra-Wide Reject Band using a Novel Quarter-Circle DGS Shape, ” ACES Journal- The Applied Computational Electromagnetics Society, vol. 27, n° 10, pp. 808-815, Oct. 2012. Website: http://www.aces-society.org/search.php?q=++challal&search=Search, Publisher: Applied Computational Electromagnetics Society

M. Challal, F. Labu, M. Dehmas and A. Azrar, “Comparative Study of Three Shapes of DGS Pattern and Design of Compact Microstrip Low-Pass and Band-Pass Filters, ” Wseas Trans. on Circuits and Systems, vol. 10, issue 12, pp. 413- 422, December 2011. Publisher: World Scientific and Engineering Academy and Society