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 Sep. 4 [cited 2026 Sep. 5];2(4):171-6. Available from: https://njemcs.edu.iq/index.php/njemcs/article/view/145