Differential RCS of a Set of Coupled Dipoles Using a Circuit Network Model: Application in RFID

This study presents an N-port circuit model for $N$ coupled RFID tags, including the coupling effects. The RFID tags are replaced by loaded dipoles. The backscattering properties of a surrounded dipole are particularly of interest in the reverse link, notably the re-radiated power and the differential radar cross section. The backscattering properties of a single dipole are compared to those of surrounded dipoles through a deterministic configuration and the impact of coupling and orientation is quantified for each dipole. A statistical analysis is presented to highlight the influence of the surface density of the dipoles on the reverse link observable.