Reconfigurable Intelligent Surfaces (RIS) have gained significant attention for some time. Thanks to the possibility of individual steering of each reflecting element of the boards, they are envisaged to impact the propagation environment significantly. In this work, we concentrate on the practical verification of this concept. We present the results of detailed measurements of the reflection characteristics of the RIS boards, which have been conducted intentionally in the real environment. Various potential impacting factors have been considered (impact of azimuth and elevation angle, polarization, number of RIS boards, and distance). Achieved measurement results constituted the basis for conceptual analysis on the practical possibility of creating a codebook (consisting of RIS patterns - codewords) for some applications.

翻译：可重构智能表面（RIS）技术已获得长期广泛关注。得益于对面板各反射单元独立调控的可能性，该技术被预期能显著影响传播环境。本研究聚焦于该概念的实际验证。我们展示了在真实环境中专门开展的RIS面板反射特性详细测量结果。研究综合考虑了多种潜在影响因素（方位角与俯仰角影响、极化方式、RIS面板数量及传输距离）。所获得的测量结果为分析构建面向特定应用的码本（由RIS模式——即码字构成）的实际可行性提供了概念性研究基础。