A review of passive RFID tag antenna-based sensors and systems for structural health monitoring applications. Sensors 2017, 17, 265. [CrossRef] [PubMed] 14. Martínez Pérez, M.; Vázquez González, G.; Dafonte, C. Evaluation of a Tracking System for Patients and Mixed Intravenous Medication...
On the other hand, passive chipless RFID tags have been proposed for enhancement of the backscattered signal in the detection of non-conductive pipes using commercial GPR systems. Both resonant tags and chipless tags in time-domain have been proposed for this purpose [5,17–19]. As the ...