The wireless channel is a linear input-output relation that depends non-linearly on the RIS
configuration: physics-compliant models involve the inversion of an “interaction” matrix. We …

Metasurface-programmable radio environments are considered a key ingredient of next-
generation wireless networks. Yet, identifying a metasurface configuration that yields a …

Reconfigurable intelligent surface (RIS) is an emerging paradigm able to control the
propagation environment in wireless systems. Most of the research on RIS has been …

Physics-compliant channel models for radio environments parametrized by reconfigurable
intelligent surfaces (RISs) require the inversion of an “interaction matrix” to capture the …

We consider a reconfigurable intelligent surface (RIS) assisted multiple-input multiple-output
(MIMO) system in the presence of scattering objects. The MIMO transmitter and receiver, the …

Multiport network theory has been proved to be a suitable abstraction model for analyzing
and optimizing reconfigurable intelligent surfaces (RISs), especially for studying the impact …

In this paper, we present electromagnetic signal and information theory (ESIT). ESIT is an
interdisciplinary scientific discipline, which amalgamates electromagnetic theory, signal …

Reconfigurable intelligent surfaces (RISs) are planar, almost 2-D, structures that can
intelligently manipulate electromagnetic waves by low-cost near passive reflecting elements …

In this paper, we share our experience in designing, prototyping, and empirically
characterizing RF Switch-based Reconfigurable Intelligent Surfaces (RIS). Our RIS design …

In this paper, we overview electromagnetic signal and information theory (ESIT). ESIT is an
interdisciplinary scientific discipline, which amalgamates electromagnetic theory, signal …