Delta RCS of UHF RFID taking into account the shunt resistance in the tag model

Colin, Elizabeth; Moretto, Alain; Ripoll, Christian; Chakra, Sara Abou

doi:10.1109/newcas.2009.5290435

Cited by 1 publication

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“…Note first that for UHF tags in classical operation (i.e., load switching modulation), σ d is a quantity almost constant as a function of the received power when the tag is modulating and is equal to zero when the tag is not activated. (In practice, σ d is a slightly decreasing function of the received power since tags include a shunt resistance to avoid overvoltage when placed in close proximity of the reader antenna [15].) Differential RCS associated to the non-linear behavior of the tag is plotted as a function of the maximum received power by the tag in Fig.…”

Section: E Delta Rcsmentioning

confidence: 99%

Non Linear Modulation of UHF Tag

Barbot

2023

IEEE J. Radio Freq. Identif.

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This paper presents a new modulation and detection scheme for UHF RFID tags. This detection method is not based on the load switching modulation classically used by the tag to communicate with the reader. The principle relies on the generation of a modulated signal by the reader combined with the non-linearity present in any RFID chip (or other nonlinear devices). Under specific conditions, we show that the backscattered signal by the tag due to the non-linearity can produce new frequency components located around the carrier frequency used by the reader. These new components can be easily separated from the leakage and the response of the environment in the frequency domain. Moreover this detection can be done at a power which is significantly lower than the sensitivity of the chip. Thus, the associated detection range can be higher than the classical read range of the tag. In measurements, this detection range can be higher than 20 m for a fully passive tag and represents an enhancement of 30% compared to the classical read range.

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Section: E Delta Rcsmentioning

confidence: 99%

Non Linear Modulation of UHF Tag

Barbot

2023

IEEE J. Radio Freq. Identif.

View full text Add to dashboard Cite

show abstract

Delta RCS of UHF RFID taking into account the shunt resistance in the tag model

Cited by 1 publication

References 4 publications

Non Linear Modulation of UHF Tag

Non Linear Modulation of UHF Tag

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