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Chipless RFID Tag Using Hybrid Coding Technique

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3 Author(s)
Vena, A. ; Lab. de Conception et d''Integration des Syst. (LCIS), Grenoble Inst. of Technol., Valence, France ; Perret, E. ; Tedjini, S.

Increasing the coding capacity of chipless RFID tags is a key factor while considering the development of miniaturized tags. A novel hybrid coding technique by combining phase deviation and frequency position encoding is proposed here. A coding capacity of 22.9 bits is obtained simply with five resonators within a reduced dimension of 2 cm × 4 cm. The proposed tag is based on 5 `C' like metallic strip resonators having resonance frequency within the band of 2.5 GHz to 7.5 GHz. The tag is potentially low-cost since only one conductive layer is needed for the fabrication. Different tag configurations are designed and validated with measurement results in bi-static configuration. A good agreement between measurement and simulation validates the theoretical predictions.

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:59 ,  Issue: 12 )