Simulation-Based Design of a 27 GHz Two-Port Concentric Ring-Slot Microstrip Antenna for 5G mmWave Applications. Noor J. Eng. Mang. Comp. Sc. [Internet]. 2026 Aug. 31 [cited 2026 Oct. 23];2(3):576-81. Available from: https://njemcs.edu.iq/index.php/njemcs/article/view/145