A. Boutejdar; A. Omar; M. Al Sharkawy; A. Darwish, " A simple transformation of improved WLAN band pass to low pass filter using defected ground structure (DGS), defected microstrip structure (DMS) and multilayer technique," Journal of Microwaves, Optoelectronics and Electromagnetic Applications, vol. 12, pp. 111–130, 2013.
 A. Boutejdar, A. Darwich, and A. Omar, "Design and improvement of compact microstrip band pass filter employing overlapped slotted ground structure (SGS) and multilayer technique," ACES Journal, vol. 28, pp. 685–692, 2013.
 A. Boutejdar, E. Burte, and A. Omar, "The cause of the different losses in microstrip structure and approach process to their minimization," EEEfCOM 2013 (Ulm, Germany), 2013.
 A. Boutejdar, A. Omar, and E. Burte, "Design of a new compact multi-bandpass filters using multi-armed split ring resonators with direct feed," EEEfCOM 2013 (Ulm, Germany), 2013.
 A. Boutejdar, A. Omar, and E. Burte, "Design of a novel ultra-wide stop band low pass filter using quasi-Yagi-DGS-element and parallel compensated capacitors," Radar, Communication and Measurement, RADCOM 2013 (Hamburg, Germany), 2013.
 A. Boutejdar, A. Darwish, A. Omar, and E. Burte, "A new design of a configurable band pass filter based on octagonal resonators, varactor devices, and lumped low pass filter for blocking RF signals," Radar, Communication and Measurement, RADCOM 2013 (Hamburg, Germany), 2013.
 R. Lucklum, M. Zubtsov, A. Oseev, A. Omar, and A. Martinez, "Multidimensional metamaterial fluid sensor," 17th International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS & EUROSENSORS XXVII (Barcelona, Spain), 2013, pp. 1739-1742.
 A. Boutejdar, A. Omar, and E. Burte, "Design and optimization of new compact tunable 2.4-GHz band pass filter using coupled λ/2 microstrip open loop resonators and MEMES-switch technique," Microwave and Optical Technology Letters, vol. 55, pp. 2444-2450, 2013.
 A. Boutejdar, A. Omar, and E. Burte, "LPF Builds On Quasi-Yagi DGS," Microwaves & RF, vol. 4, pp. 52-58, 2013.
 B. Panzner, A. Jöstingmeier, and A. S. Omar, "A tiny double-ridged horn for subsurface radar application," 7th European Conference on Antennas and Propagation, EuCAP 2013 (Gothenburg, Sweden), 2013.
 B. Panzner, A. Jöstingmeier, and A. S. Omar, "Investigations on array element spacing of a synthetic aperture for subsurface imaging," 14th International Radar Symposium, IRS 2013 (Dresden, Germany), 2013, pp. 824-828.
 A. Gaber and A. Omar, "Joint time delay and DOA estimation using 2-D matrix pencil algorithms and IEEE 802.11ac," 10th Workshop on Positioning, Navigation and Communication, WPNC (Dresden, Germany), 2013, pp. 20-21.