High-Isolation Super-Wideband MIMO Antenna Based on Elliptical-Ring Geometry for Next-Generation Wireless Applications

In this work, a compact elliptical-shaped multiple-input multiple-output (MIMO) super-wideband antenna with port isolation greater than 17 dB is suggested for use in future wireless communication systems. The simulated outputs indicate a super-wide band from 2 to 30 GHz, with a proportional bandwidth of 15:1 for $$|S_{11}| < -10$$ dB. Surface current analysis confirms the effectiveness of the proposed isolation mechanism. For purposes involving MIMO, two identical antennas are positioned orthogonal to one another. In the Super-Wideband (SWB) spectrum, the recommended MIMO antenna has a low correlation coefficient ( $$< 0.0035$$ ), reduced mutual coupling ( $$< 17$$ dB), and small reflection coefficient ( $$< -10$$ dB). The E- and H-plane radiation characteristics and the absolute peak gain of the MIMO antenna are illustrated. The tested and simulated outcomes agreed well with each other. The developed antenna can be utilized in both commercial and tactical wireless systems because of its acceptable radiation performance over a broad range of frequencies. The designed antenna can be used for satellite Internet services, next-generation communication, and WLAN networking broadcasts.