Al Ghifarry MF, Kamardin K, Yoshihide Yamada, Idris IH. Electromagnetic Simulation of Metamaterial Lens Antenna with Negative Refractive Index at 28GHz. IJIE [Internet]. 2025 Dec. 29 [cited 2026 Apr. 8];17(6):71-83. Available from: https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/21875