Abstract :

The rapid evolution of fifth-generation (5G) wireless communication systems demands antennas capable of operating at millimeter-wave (mm-wave) frequencies with high data rates, low latency, and enhanced channel capacity. Among the mm-wave bands, 28 GHz and 38 GHz are widely allocated for 5G communications due to their large bandwidth availability. This paper presents the design and analysis of a compact planar four-port Multiple-Input Multiple-Output (MIMO) antenna suitable for mm-wave 5G applications. The proposed antenna is designed on a low-loss dielectric substrate to ensure high radiation efficiency and stable performance. A compact structure is achieved while maintaining good impedance matching and wide bandwidth. Mutual coupling between antenna elements is significantly reduced using optimized element placement and isolation techniques. The antenna exhibits good MIMO performance in terms of envelope correlation coefficient (ECC), diversity gain, and channel capacity loss. Simu