Wide-Angle Impedance Matching Layer-Enhanced Dual-Polarization sub-6 GHz Wide-Scan Array for Next-Generation Base Stations

A new sub-6 GHz antenna array that supports slant ±45° dual-polarization multiple-input multiple-output (MIMO) communications with high interport isolation and stable radiation performance over wide scan angles and bandwidths is designed. An architecturally inexpensive solution, which combines a standard truncated waveguide array and a single-layer patterned metasurface superstrate with wave manipulation capabilities, is proposed. A task-oriented formulation is adopted to mathematically formulate theEMassociated multiscale design problem, then solved with an innovative instance of the system-by-design (SbD) paradigm where the fast and reliable modeling of the device is yielded by anad hocartificial intelligence-based surrogate. The final layout of the antenna array is validated with industry-standard full-wave numerical simulators.