Design of Wideband MIMO Antenna for 6G THz Systems

Numerical optimization of antenna characteristics is an efficient tool to obtain optimal antenna designs with lower sizes, higher gains and wider bandwidths. This paper presents a design and implementation of an antenna prototype based on numerical investigation and optimization of a two-element MIMO antenna model that provides these features. Numerical investigation involves simulating antenna models to assess performance metrics like bandwidth and gain. Optimization techniques, such as genetic algorithms, adjust design parameters like element spacing and size. In this article, the proposed design is examined from several perspectives, for example, the performance of the MIMO antenna model and the single-element antenna model with dimensions of 65 × 65 µm<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> are analyzed and compared. It is found that the proposed model provides two frequency bands with bandwidths of 17.9 THz and 20.3 THz, with an expansion of around 110% compared to single element model. On the other hand, an edge-to-edge distance of 20 µm is selected in the proposed design to prevent mutual coupling between the antenna elements, and decoupling network approach is applied to obtain enough isolation in the proposed MIMO antenna model. A comparative analysis is conducted between the two-element MIMO design, the square-shaped single element antenna model, with other designs introduced in the literature. It is found that the proposed antenna design has high gain, wide operating bandwidths which are essential requirements of 6G mobile communication technology.