Quadratic scaling of received signal power with RIS element count is achievable in L-operator systems only when group-connected BD-RIS has group size Gs >= L; conventional single-connected RIS yields only linear scaling.
Global optimal closed -form solu- tions for intelligent surfaces with mutual coupling: Is mut ual coupling detrimental or beneficial?
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RIS Optimization and Scaling Laws in Multi-Operator Systems: Is Quadratic Scaling Achievable?
Quadratic scaling of received signal power with RIS element count is achievable in L-operator systems only when group-connected BD-RIS has group size Gs >= L; conventional single-connected RIS yields only linear scaling.