Selecting Impedance States in a Passive Computational RFID Tag Backscattering in PSK

Muralter, Florian; Landaluce, Hugo; Del-Rio-Ruiz, Ruben; Perallos, Asier

doi:10.1109/lmwc.2019.2935303

Cited by 5 publications

(4 citation statements)

References 8 publications

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“…The choice of the modulation format depends on several aspects, but according to Reference 18, using PSK results in an increased performance. With PSK communication 14 it is possible to achieve a constant power transfer between the antenna and the chip, as the impedance states can be selected in a way, that they yield the same power reflection coefficient |s| 2 . For an RFID system backscattering ASK, the most common method to choose the impedance states is to create a near-perfect conjugate match for the main state, and switch to a deliberate mismatch for the opposing transmission bit.…”

Section: Load Modulationmentioning

confidence: 99%

“…Its limiting factors are the reader sensitivity as well as the power level of the incident wave at the tag. Due to the high sensitivity of modern RFID readers, the first factor can be neglected for this investigation 14 . Considering the second factor, the tag read range in a free space environment can be estimated using Friis equation 15 …”

Section: Theoretical Studymentioning

confidence: 99%

Section: Theoretical Studymentioning

confidence: 99%

“…It can also be used to represent the amplitude of the backscattered signal. Hence, a trade‐off between power transmission to the chip and backscatter amplitude has to be considered, as we have discussed in Reference 14.…”

Section: Theoretical Studymentioning

confidence: 99%

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A theoretical and experimental study of passive computational radio frequency identification tags

Muralter

Arjona

Landaluce

et al. 2020

Trans Emerging Tel Tech

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The investigation and optimization of the RF frontend of radio frequency identification (RFID) tags represents a crucial topic when looking for an increased tag performance. This work studies the RF frontend of three state-of-the-art passive computational RFID tags: AMS SL900a Dev Kit, Farsens Spider Eval, and WISP 5.1. Given a module-based approach, the antenna, the matching network, the RF energy harvesting, and the load modulation are reviewed both theoretically and experimentally. The influence of a set of properties, corresponding to these modules, on the overall RFID tag performance is evaluated using a tag read range measurement.

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Section: Load Modulationmentioning

confidence: 99%

Section: Theoretical Studymentioning

confidence: 99%