A chipless RFID system based on substrate impedance waveguide resonators (SIW)

This work presents the design of a chip-less RFID tag based on surface impedance waveguide resnators and a Van-Atta array. The Van Atta array is aimed at reflected back the impinging electromagnetic wave for every angle of incidence. The information is provided thanks to a set of compact SIW resonators. The antenna array is a four elements patch antenna array with circular polarization. The antenna and the SIW resonators have been optimized by means of a suitable optimization tool to maximize their performances. A tag prototype has been designed, fabricated and experimentally assessed. The obtained results clearly demonstrated the effectiveness of this technology.