Fractal-shaped super UWB (96THz) of quadpot MIMO antenna for 6G communication

The present work aims to design an ultra-wideband Quad-port MIMO antenna structure with good gain and isolation for the THz spectrum to cover 6G communication applications. The size of the presented design is 130 × 130 × 1.6 µm³. The structure is designed using a polyamide material. The analysis of structure was carried out over the 0.1THz to 150THz. The optimum shape of the radiating structure is designed based on four iterations. The fractal property of the structure is provided by engraving a patch with four circles. The result is optimized by varying the fractal’s radius and the ground region’s length. The bandwidth enhancement and impedance improvement is achieved due to the partial ground approach. The uncomplicated form of the radiating patch facilitates the process of manufacturing. The use of the partial ground technique is effective in mitigating mutual coupling. The suggested design offers an extensive range of frequencies, spanning 96 THz (49THz to 145THz), and achieves a reflection coefficientof − 53.56 decibels. The design yields a substantial gain of 19.60 dB and achieves consistent isolation of over 30 dB. The performance of further analyses, such as radiation pattern, E-field, H-field, and diversity performance indicators, is evaluated and found to be within the allowable range. The proposed design is very appropriate for 6G communication, high-resolution medical imaging, and industrial automation.