A Compact Omnidirectional Antimetal Tag Antenna for UHF RFID Systems
Bibliographic record
Abstract
A compact anti-metal tag antenna with excellent performance of far-field omnidirectional radiation for ultrahigh-frequency (UHF) radio frequency identification (RFID) systems is proposed. The proposed antenna comprises an upper radiating patch with a nested three-ring design, a double-ring middle patch, and a ground patch. These patches are separated by two foam substrate layers and interconnected via two shorting stubs. This design ensures that the current distribution in each patch layer maintains the same rotational direction, thereby achieving excellent omnidirectional radiation performance when the antenna is mounted on metallic planes. The proposed antenna has a dimension of π × 17² × 2 mm³. Experimental results show a stable read range of 6.5–7 m in all azimuthal directions under an effective isotropic radiated power (EIRP) of 3.28 W. The proposed tag has advantages including miniaturization, anti-metal capability, omnidirectional radiation, and long read range, making it suitable for various application scenarios such as industrial automation and intelligent warehousing.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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 teacher head, 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".