Fig. 14From: RIS-enabled smart wireless environments: deployment scenarios, network architecture, bandwidth and area of influenceRF-switch-based R-RIS unit cell characterisation: a structure, b magnitude and c phase of the \(\textrm{S}11\) parameter for the 7 different configurations, and d contrast of the \(\textrm{S}11\) parameter for the considered different configurations versus the frequency in GHzBack to article page