Reconfigurable Intelligent Surfaces (RIS) have been identified as a potential ingredient to enhance the performance of contemporary wireless communication and sensing systems. Yet, most of the existing devices are either costly or not available for reproduction. To close this gap, a Reconfigurable Intelligent Surface for the frequency range of 5 GHz WiFi is presented in this work. We describe the designed unit cell, which is optimized for the full frequency range of 5.15 to 5.875 GHz. Standard FR4 substrate is used for cost optimization. The measured reflection coefficient of a rectangular RIS prototype with 256 elements is used for RF performance evaluation. Fabrication data and firmware source code are made open source, which makes RIS more available in real measurement setups.

翻译：可重构智能表面（RIS）被确定为增强当代无线通信与感知系统性能的潜在关键组件。然而，现有设备大多成本高昂或无法复现。为弥补这一不足，本文提出了一种面向5 GHz WiFi频段的可重构智能表面。我们详细介绍了所设计的单元结构，该结构针对5.15至5.875 GHz全频段进行了优化。为降低成本，采用标准FR4基板。通过实测含256个单元矩形RIS原型的反射系数进行射频性能评估。制造数据与固件源代码已开源，从而使得RIS更易应用于实际测量场景。