Novel Ten-Port MIMO Antenna with Enhanced Polarization Diversity for 5G Applications

This design presents a novel ten-port Multi-Input Multi-Output (MIMO) antenna tailored for 5G smartphone applications. The antenna features a distinctive notched
radiator etched on the ground plane, enabling operation within the 3.3 - 3.8 GHz frequency range, which is critical for 5G connectivity. To achieve desirable polarization
diversity, the locations of the ten antenna elements were strategically chosen, significantly minimizing the coupling error rate and enhancing overall performance. The
antenna's performance was rigorously validated through the fabrication of a prototype, ensuring that simulation results closely matched real-world outcomes. Comprehensive
testing revealed excellent performance across the intended operating bandwidth with a reflection coefficient greater than 10 dB, ensuring effective impedance matching.
Additionally, isolation between the antenna ports exceeded 20 dB, which is crucial for maintaining signal integrity in MIMO systems. The antenna also demonstrated
impressive radiation efficiency, exceeding 74%, and a minimum correlation coefficient (ECC) of less than 0.03, indicating low correlation between antenna elements and
thus enhancing MIMO capability. Furthermore, the study evaluated the impact of the human hand on Specific Absorption Rate (SAR) to assess safety and performance in
practical usage scenarios. This comprehensive analysis of the ten-port MIMO antenna underscores its potential for integration into future 5G smartphones, balancing
performance, efficiency, and user safety.