Enhancing data density in chipless RFID: A hybrid coding framework

Manbir Kaur

doi:10.1016/j.aeue.2026.156477

Enhancing data density in chipless RFID: A hybrid coding framework

2026-07-01

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DOI：10.1016/j.aeue.2026.156477

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Chipless RFID tags, designed as low-cost and reliable alternatives to conventional systems, face challenges due to their passive nature, limiting their performance in tracking and identification applications. The major shortcomings of RFID tags are their limited data encoding capacity and short reading range. To overcome the constraint of encoding data capacity, hybrid chipless RFID tags were developed. This paper improves the most existing research on hybrid chipless RFID tags. For chipless RFID tags, a new encoding method using combination of impedance loading, polarization diversity, and frequency division multiplexing is proposed. The technique leads to the encoding of more codes with significantly small-sized tags. In this paper, the tag is designed using FR4 substrate with permittivity of 4.4 and thickness of 0.15 mm. The proposed coding method is able to distinguish 213 RFID tags. The proposed tag is fabricated and measured to validate the simulated results.

Keywords:

Backscattering

Coding capacity

Frequency-domain

Hybrid coding

Impedance loading

Polarization diversity

Enhancing data density in chipless RFID: A hybrid coding framework

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