Ibrahim, Sura Khalil, Mandeep Jit Singh, Mohammad Tariqul Islam, Md Shabiul Islam, Samir Salem, and 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”. International Journal of Electronics and Telecommunications 72, no. 3 (July 31, 2026): 1–8. Accessed August 31, 2026. https://wydawnictwo.pan.pl/index.php/ijet/article/view/2939.