Planar dual-mode MIMO antenna with enhanced bandwidth

The paper proposes a dual-port patch antenna for MIMO applications, optimized using surrogate-based optimization techniques The antenna uses two resonant modes (TM₁₀₀ and TM₂₀₀ to generate two independent radiation patterns. To enhance the bandwidth of TM₂₀₀ mode, the patch ground plane was realized as a meshed surface. The proposed approach provides 97 MHz of bandwidth, while preserving a low profile of 15 mm between the patch and the groundplane (̅_r = 3.5) The numerical optimization involved 12 adjustable geometry parameters.