# Static Power Consumption Modeling and Measurement of Reconfigurable Intelligent Surfaces

## TL;DR

This paper models and measures the static power consumption of reconfigurable intelligent surfaces, focusing on hardware components like FPGA control boards and drive circuits, to aid in energy-efficient wireless system design.

## Contribution

It provides a detailed static power consumption model for RIS hardware components, including drive circuits, and presents measurement results for different RIS types.

## Key findings

- Drive circuit power varies with control signals
- Static power consumption is quantified for different RIS types
- Measurement results validate the proposed models

## Abstract

Reconfigurable intelligent surfaces (RISs) are anticipated to transform wireless communication in a way that is both economical and energy efficient. Revealing the practical power consumption characteristics of RISs can provide an essential toolkit for the optimal design of RIS-assisted wireless communication systems and energy efficiency performance evaluation. Based on our previous work that modeled the dynamic power consumption of RISs, we henceforth concentrate more on static power consumption. We first divide the RIS hardware into three basic parts: the FPGA control board, the drive circuits, and the RIS unit cells. The first two parts are mainly to be investigated and the last part has been modeled as the dynamic power consumption in the previous work. In this work, the power consumption of the FPGA control board is regarded as a constant value, however, that of the drive circuit is a variant that is affected by the number of control signals and its self-power consumption characteristics. Therefore, we model the power consumption of the drive circuits of various kinds of RISs, i.e., PIN diode-/Varactor diode-/RF switch-based RIS. Finally, the measurement results and typical value of static power consumption are illustrated and discussed.