Ibrahim SK, Singh MJ, Islam MT, Islam MS, Salem S, Al-Bawri. Design massive MIMO antenna array system using Single/Double Negative (S/DNG) metamaterial unit cells for 5G sub-6 GHz base station applications. ijet [Internet]. 2026 Jul. 31 [cited 2026 Aug. 31];72(3):1-8. Available from: https://wydawnictwo.pan.pl/index.php/ijet/article/view/2939