Design of a chipless RFID tags based on natural fractal geometries for security applications

Abstract

A printed antenna has been designed based on two‐dimensional image of a fractal‐jet fluid. The numerical analysis performed with HFSS software has reported multiband resonances over the frequency band 1–20 GHz. Experimental characterization in terms of impedance matching, bandwidth, gain, and radiation patterns over the band 1–6 GHz has shown a unique electromagnetic response of the antenna allowing it to be used as a chipless RFID tag for security applications. Details on the antenna design, numerical, and experimental results are presented and discussed. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:75–82, 2016

Investigation of a Random-Fractal Antenna Based on a Natural Tree-Leaf Geometry

“…Table 1 summarizes the main results we have obtained for the measured resonance frequencies. The high complexity of the fractal patch antenna and its multi-and narrowband behaviors offers it a unique electromagnetic signature, permitting its use to secure chipless RFID systems [11].…”

“…Finally, we can conclude that the main common point between all fractal antennas (deterministic and random) is their multiband behavior; however, irregular fractal structures inspired from nature such as the proposed leaf antenna or the fluid-jet antenna [11] offer more resonating peaks than deterministic fractal antennas such as the Sierpinski triangle antenna [4] and Koch monopole antenna [5], which is very useful for RF coding applications.…”

“…Finally, we have simulated the designed structures and have also characterized them experimentally. The bioinspired designed antenna which is characterized by complex fractal shape and unique electromagnetic signature can be used to secure chipless RFID systems [11]. In fact, RFID tags based on irregular fractal shapes inspired from nature are difficult to replicate by an unauthorized reader, especially when they are printed with invisible conductors which is important for authentication, anticounterfeiting, and security applications.…”

A chipless RFID tag for smart temporal applications

“…The backscattered signal, in this case, is measured as RCS response of the tag. 8 FD tags overcome the challenges posed by TD tags through higher data density and cost-effective printing as reported in a number of publications. In Ref.…”

“…On the other hand, backscattering‐based tags function by generating a backscattered signal upon being placed in proximity of the reader. The backscattered signal, in this case, is measured as RCS response of the tag …”