The 5th generation (5G) wireless communication is crucial for managing the surge in wireless data traffic driven by smart devices and live streaming. The utilization of 5G-mmWave antennas presents substantial advantages such as improving bandwidth and accommodating intense data traffic. However, certain challenges emerge, particularly free space path loss due to atmospheric absorption by carbon dioxide, oxygen, and rain, which may impact service coverage. High-gain antennas play a crucial role in compensating for these losses. Designing 5G-mmWave antennas demands careful consideration, highlighting the importance of electromagnetic (EM) simulation to optimize performance and ensure reliable operation of high-speed applications in diverse environmental conditions.