Chipless RFID tag based on metamaterial absorbers

Luana Vaz, Vinicius Barros, Ana Silva, Maurício Weber, Vanessa Magri, Tadeu Ferreira

DOI: 10.14209/sbrt.2022.1570813120

Evento: XL Simpósio Brasileiro de Telecomunicações e Processamento de Sinais (SBrT2022)

Keywords: Metamaterial RFID tag absorber

Abstract

A metamaterial absorber used as RFID tag is proposed in this paper. Absorbers lead to small tags with absorption peaks as characteristic signatures. The designed structure is a metasurface with metallic frequency selective surfaces over a grounded dielectric slab. CST simulations have absorption peaks of 99.25% at 3.5 GHz and 99.4% at 5.9 GHz. Absorber unit cell on FR-4 is a square of dimensions of 0.201 times the wavelength at the low resonant frequency. Simulated radar cross section presents adequate beamwidth for the designed frequency bands.

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