期刊
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
卷 62, 期 8, 页码 4402-4407出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2014.2326421
关键词
Chipless radio frequency identification (RFID); electromagnetic absorbers; frequency selective surfaces (FSS); high-impedance surface (HIS); metamaterials; RFID mounted on metal
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.
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