Broadband MIMO Antenna with Self-Complementary Resonating Structures for 5G Smartphones

This paper presents an innovative MIMO antenna design using self-complementary resonators with highly desirable characteristics. The MIMO array consists of eight L-shaped slits etched in the ground and fed by L-shaped microstrip lines on the top layers. The operating frequency range for these elements is 2.6-3.6 GHz, falling within the sub-6 GHz 5G cellular communication bands. The MIMO array's compact footprint makes it suitable for integration into smartphones, occupying a relatively small area on the device's board. Despite its size, the design achieves excellent performance in crucial aspects such as S-parameters, radiation patterns, impedance bandwidth, radiation diversity, efficiency, and gain. These results meet the requirements for future 5G handheld smartphones, making the suggested MIMO antenna design highly promising for practical applications in the rapidly advancing 5G technology landscape.