This communication aims to demonstrate both theoretically and experimentally that chipless tags can be efficiently detected on metallic platforms by exploiting cross-polar reflection. The employed tag consists of a frequency selective surface (FSS) comprising concentric square loop resonators printed on a grounded dielectric slab. The co-polar reflection amplitude of the proposed structure is characterized by deep minima in correspondence of every resonance, whereas the cross-polar component of the reflection coefficient exhibits well defined frequency selective maxima. Since each resonance is determined by a specific concentric loop, the presence or the absence of a loop is used to apply an amplitude modulation on the reflected signal. Measurements on realized prototypes are also provided to assess the effectiveness of the proposed technique.
|Autori:||Costa, Filippo; Genovesi, Simone; Monorchio, Agostino|
|Titolo:||Chipless RFIDs for metallic objects by using cross polarization encoding|
|Anno del prodotto:||2014|
|Digital Object Identifier (DOI):||10.1109/TAP.2014.2326421|
|Appare nelle tipologie:||1.1 Articolo in rivista|