SbD-based Propagation Contouring through 1-bit Dual-Polarization Reconfigurable Intelligent Surfaces

The possibility to achieve advanced beam contouring capabilities with single-bit dual-polarization reconfigurable intelligent surfaces (RISs) is addressed in this contribution with reference to their application in the Smart Electromagnetic Environment (SEE) framework. The discrete multi-scale RIS reconfiguration problem is firstly recast in terms of a phase-only inverse source one. The RIS discrete descriptors are then optimized through a customized System-by-Design (SbD) strategy. Preliminary numerical results are presented to illustrate the wave manipulation capabilities and efficiency enabled by the proposed strategy.