Reflection Amplifier with Phase Control Suitable for Active Reconfigurable Intelligent Surfaces

In this work, an elementary circuit block suitable for Active Reconfigurable Intelligent Surface (ARIS) implementation, at 5.8GHz, is presented. The chain is composed of a reflection amplifier cascaded to a phase shifter. The block exhibits a variable gain in the 0 to 15 dB range, and a maximum phase shift of 260∘, by varying the amplifier supply and phase shifter control voltages in the 2.5 V to 3.5 V and 0 V to 5 V ranges, respectively. The maximum power consumption of the cascade is within 52.5 mW. This work is the result of a collaboration between the University of Florence and the University of Perugia, in the frame of the PRIN 2022 SIPT-VARIS project.