Ahmed El-makadema
I am currently a Senior Technical Specialist at the Jodrell Bank Centre for Astrophysics. I received a BEng and MSC in Communication Engineering from the University of Manchester and have been working on the Square Kilometer Array Project since 2006. I completed my PhD at the University of Manchester in 2011 in the area of large-scale broadband antenna arrays. My primary research focus is in the areas of wideband antenna, large antenna array design, beamforming, electromagnetic computation, and radars.
Publications
2024
[1] Meng, C.; Zhang, Y.; Temiz, M.; El-Makadema, A.” A Multiobjective Array Beamforming Method for Arrays of Flexible Shape”. Electronics 2024, 13, 752. https://doi.org/10.3390/electronics13040752
2023
[2] Yongwei Zhang , Huijuan Xing , Xianyang Lv , Murat Temiz Yanwei Fu , Quan Shi , Ahmed El-Makadema , Ao Zhang, and Jianjun Gao "Calibration of Aperture Arrays in Time Domain Using the Simultaneous Perturbation Algorithm" in IEEE Transactions on antenna and propagation. 2023. doi: 10.1109/TAP.2023.3255642.2022[3] X. Lv, Y. Zhang, Q. Shi, M. Temiz and A. El-Makadema, "A Dual Slant-Polarized Cylindrical Array of Tightly Coupled Dipole Antennas," in IEEE Access, vol. 10, , 2022, doi: 10.1109/ACCESS.2022.3159791.[4] Haofeng Peng, Yongwei Zhang, Senlai Zhu, Murat Temiz, Ahmed El-Makadema “Determining dielectric properties of nematic liquid crystals at microwave frequencies using inverted microstrip lines” In Liquid Crystal, 2022 DOI: 10.1080/02678292.2022.2102685[5] YANWEI FU , YONGWEI ZHANG , MURAT TEMIZ , AHMED EL-MAKADEMA , AND JIAJIA SHI , “A Foldable Tightly Coupled Crossed Rings Antenna Array of Ultrawide Bandwidth and Dual Polarization” IEEE Access, 17 August 17, 2022, DOI: 10.1109/ACCESS.2022.3199367[6] X. Lv, Y. Zhang*, Y. Fu, Q. Shi, and A. El-Makadema, “Bent coplanar waveguide feeds for balanced planar antennas and arrays”. Electronic Letters, 2022, 58(21): 786–788.[7] Huijuan Xing, Yongwei Zhang, Yanwei Fu, Xianyang Lv, Zhihuo Xu, Jiajia Shi, Quan Shi, Murat Temiz, Ahmed El-Makadema “Antenna array calibration methods based on simultaneous perturbation” IET Microwave antenna and propagation, 03 October 2022 https://doi.org/10.1049/mia2.123042021[8] Huijuan Xing, Yanwei Fu, Xianyang Lv, H. Peng, Q. Wu, Y. Zhang, M. Temiz, A. El-Makadema, “In-House Made Inverted Microstrip Line Phase Shifter Based on Nematic Liquid Crystal” The International Symposium on Antennas, Propagation and EM Theory (ISAPE) 2021, December 1-4, 2021, Zhuhai, China.[9] Yanwei Fu, Huijuan Xing, Xianyang Lv, H. Peng, Z. Xu, Y. Zhang, M. Temiz, A. El-Makadema, “Equivalent Circuit of Metamaterial Formed by Array of Conductive Disks,” The International Symposium on Antennas, Propagation and EM Theory (ISAPE) 2021, December 1-4, 2021, Zhuhai, China.[10] X. Lv, Y. Zhang, Q. Shi, M. Temiz, A. El-Makadema, “Examining Food Quality via RFID tag Array,” 2021 International Conference on Microwave and Millimeter Wave Technology (ICMMT2021), May 23-26, 2021, Nanjing, China.[11] X. Lv, Y. Zhang, Q. Shi, M. Temiz and A. El-Makadema, "A Dual Slant-Polarized Cylindrical Array of Tightly Coupled Dipole Antennas," in IEEE Access, vol. 10, , 2022, doi: 10.1109/ACCESS.2022.3159791.2020[12] Y. Zhang, Quan Shi, Ahmed El-Makadema, Laith Danoon, Anthony Brown, “Triangular grid interconnected crossed rings antenna for large-scale ultra-wideband dual-polarised arrays” IET Microwave, Antenna & propagation, Volume 14, Issue, 16 December 2020.2019[13] Y. Zhang, Ahmed El-Makadema, A. K. Brown, “A Broadband Planar Aperture Array with Elements Arranged on a Triangular Grid” IEEE Transactions on Antennas and Propagation, March 2019.[14] Y. Zhang, Dong Chen, Ahmed El-Makadema, Laith Danoon, Anthony Brown, “Polarimetric Performance of the Interconnected Crossed Ring Antenna Array” The 41th PIERS in Rome, Italy, 17-20 June, 2019.[15] Y. Zhang, A. El-Makadema, L. Danoon and A. K. Brown, " Planar Phased Array Feed for the Lovell Telescope" ICEAA - IEEE APWC 2019 - September 9-13, 2019, Granada, Spain.2018[16] Y. Zhang, A. El-Makadema, Eloy de Lera Acedo, Pieter Benthem, Séverin Barth, and Anthony K. Brown “On the Front-End Design of Mid-Frequency Aperture Array for Square Kilometer Array” Experimental Astronomy 46, 357–380 (2018)[17] Yongwei Zhang, Ahmed El-makadema, Nima Razavi-Ghods, and Anthony K. Brown “Thinned Planar Aperture Array with High Polarization Purity for SKA” 2nd URSI AT-RASC, Gran Canaria, 28 May – 1 June 20182017[18] Yongwei Zhang, Anthony K. Brown, Ming Yang, Ahmed El-Makadema “Graphene Based Cross Ring Antenna Array with Electromagnetic Band Gap Structures” 11th European Conference on Antennas and Propagation (EUCAP) 2017[19] Yongwei Zhang, Ahmed El-Makadema, and Anthony K. Brown, “Dual polarised crossed ring antenna array with high polarimetric purity” International Conference on Electromagnetics in Advanced Applications (ICEAA). September 20172016[20] Ahmed El-Makadema, Yongwei Zhang, Ming Yang, Anthony K. Brown “System noise reduction through null steering in large WideBand Aperture Arrays" International Conference on Electromagnetics in Advanced Applications (ICEAA). September 2016[21] Yongwei Zhang, Ahmed El-Makadema, Ming Yang, Anthony K. Brown "Smart Surface for Aperture Array Using Non Uniform Distribution " Phased Array Systems and Technology (PAST), IEEE International Symposium on, 18-21 Oct. 20162015[22] Yongwei Zhang, Anthony Brown, Ming Yang, Ahmed El-Makadema, Sangitiana F. Harison and Stéphane Bosse "Differential Front-End Design for Mid-Frequency Aperture Array Design" International Conference on Electromagnetics in Advanced Applications (ICEAA), September 2015.[23] Ahmed El-Makadema, Yongwei Zhang, Ming Yang, Anthony K. Brown "On the Geometry of the Square Kilometer Array MidFrequency Aperture Array" International Conference on Electromagnetics in Advanced Applications (ICEAA). September 20152014[24] El-Makadema, A.; Rashid, L.; Brown, A.K., "Geometry Design Optimization of Large-Scale Broadband Antenna Array Systems" Antennas and Propagation, IEEE Transactions on, vol.62, no.4, pp.1673, 1680, April 2014[25] Danoon, Laith; A El-Makadema; Brown, Anthony "On the integration of lightning protection with stealth coated wind turbine blades” Wind Energy vol. 17, issue 10, pp. 1577-1585, October 20142013[26] A. K. Brown, A El-Makadema "(Sparseness) in Broadband Array Antennas" International Conference on Electromagnetics in Advanced Applications (ICEAA), September 2013. Torino, Italy.2012[27] N. Razavi-Ghods, E. de Lera Acedo, A. El-Makadema, P. Alexander, A. Brown, “Analysis of Sky Contributions to System Temperature For Low Frequency SKA Aperture Array Geometries”, Experimental Astronomy March 2012, Volume 33, Issue 1, pp 141-155[28] Ahmed El-makadema, “Large Scale Broadband Antenna Array System”, Department of electrical&electoniEngineering, The University of Manchester, PhD Thesis. 1st August 2012[29] A El-makadema., Razavi-Ghods N., Brown A.K “Scanning Performance of SKA-Low Sparse Array Configurations Incorporating Realistic Element Patterns and Sky Noise Contributions” International Conference in Electromagnetics for Advanced Applications September 2012, Cape Town, South Africa.2009[30] N. Razavi-Ghods, E. de Lera Acedo, A. El-Makadema, P. Alexander, A. Brown, “Analysis of Phased Aperture Array Geometries for Low Frequency Radio Astronomy” WIDEFIELD SCIENCE AND TECHNOLOGY FOR THE SKA SKADS CONFERENCE 2009 S.A. 4-6 November 2009, Chˆateau de Limelette, Belgium[31] A. El-makadema and A.K. Brown, “Broadband Space Tapered Golden Ratio Spiral Phased Arrays” WIDEFIELD SCIENCE AND TECHNOLOGY FOR THE SKA SKADS CONFERENCE 2009,THE SKA SKADS CONFERENCE 2009 S.A. 4-6 November 2009, Chˆateau de Limelette, Belgium.2008[32] A.El-makadema, A.K Brown, “Cost performance optimization of large scale wideband arrays for radio telescope applications” Loughborough Antennas & Propagation Conference, 2008.