This study introduces a simple MIMO antenna configuration tailored specifically for future handheld devices. The design incorporates eight microstrip-fed open-ended slot antenna elements etched onto the same layer as the ground plane. These elements are arranged in L-shaped slits with a rectangular microstrip feeding line, enabling operation within the frequency range of 3.4-3.8 GHz, falling within the sub-6 GHz 5G cellular communications band. Despite its compact size, the array exhibits outstanding performance and has been extensively analyzed concerning its essential characteristics. The compact MIMO array occupies minimal space on the smartphone's board while delivering optimal performance in terms of S-parameters, radiation patterns, radiation diversity, efficiency, and gain. The design meets the stringent requirements for future 5G handheld smartphones. Furthermore, the antenna's radiation performance in close proximity to the user ensures a dependable and resilient communication experience.

MIMO,antenna polarization,5G