A Printed Paper-based RFID Tag for Wireless Humidity Sensing
Bibliographic record
Abstract
The trend toward low-cost, lightweight, and flexible RFID tags capable of sensing is growing. This work proposes a printed paper-based RFID tag for wireless humidity sensing. The proposed RFID tag, which does not require an integrated chip, is a parallel inductive-capacitive (LC) resonator whose interdigitated capacitor is coated with Polyvinyl Alcohol (PVA). Variation in the quality factor and resonant frequency of the tag in response to change of humidity can be remotely tracked with an interrogator coil inductively coupled to the RFID tag. To make the whole tag easy to print on a low cost flexible paper based substrate, a new configuration for the spiral inductor coil is proposed. It is experimentally shown that a change in relative humidity from 86% to 91 % results in a shift of notch frequency and an increase in magnitude at notch frequency of the reflection coefficient of the interrogator by 6 kHz and 0.07 dB, respectively. Finally, the long-term stability of the printed RFID tag in measuring humidity is demonstrated.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.002 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".