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math.OC2025
Reducing Simulation Effort for RIS Optimization using an Efficient Far-Field Approximation
Hans-Dieter Lang, Michel A. Nyffenegger, Heinz Mathis +1
Optimization of Reconfigurable Intelligent Surfaces (RIS) via a previously introduced method is effective, but time-consuming, because multiport impedance or scatter matrices are r…
math.OC2024
Validating Convex Optimization of Reconfigurable Intelligent Surfaces via Measurements
Hans-Dieter Lang, Michel A. Nyffenegger, Sven Keller +4
Reconfigurable Intelligent Surfaces (RISs) can be designed in various ways. A previously proposed semidefinite relaxation-based optimization method for maximizing power transfer ef…