Marc Lazaro Marti is Professor at Universitat Rovira i Virgili, Spain. His research focuses on semi-passive RFID systems, backscatter communication and radar applications. Antonio Lazaro Guillen is Professor at Universitat Rovira i Virgili, Spain. His research interests include microwave device modeling, MMICs, low phase noise oscillators, RFID, UWB systems and MEMS. David Girbau Sala is Professor at Universitat Rovira i Virgili, Spain. His research includes microwave systems, UWB, RFID, RF-MEMS and wireless sensing, as well as low-power, high-frequency technologies for IoT and sensor networks. Ramon Villarino Villarino is Professor at Universitat Rovira i Virgili, Spain. His research focuses on radiometry, UWB systems, RFID and metamaterial-based frequency-selective structures.