RECONFIGURABLE INTELLIGENT SURFACE, RIS, WITH SENSING CAPABILITIES AND METHOD FOR OPERATING THE SAME

摘要

A reflective device (10) is disclosed that comprising a control element (20) and an array of reflective elements (14), wherein each reflective element (14) comprises an antenna element (16) and a phase shifter (18) and is under control of the control element (20) so as to reflect a radio-frequency, RF, signal incident on the reflective element (14) with an adjustable phase shift, wherein different phase shifts are realized by the phase shifter (18) channeling the RF signal into a specific one of a number of different delay lines (22). One or more of the delay lines (22) comprise an extension unit (23) configured to extract a portion of the power of the RF signal channeled into the respective one of the delay lines (22) by the phase shifter (18) and to measure or estimate the voltage, the current and/or the power of the extracted portion of the RF signal.