Elliptical Programmable Metasurface Antenna Based on Substrate Integrated Waveguide Technology for Millimeter-Wave Applications
Bibliographic record
Abstract
This work presents a programmable metasurface antenna designed for dynamic communication systems. The design utilizes bias feeding to control the activation of PIN diodes across the metasurface capacitive gaps, aligned with the microstrip line. This structure operates in dual frequency bands within the millimeter-wave range, specifically around 25 GHz and 28 GHz. The system exhibits excellent performance, achieving transmission coefficients of -1.7 dB at 25.3 GHz and -2 dB at 27.6 GHz, using a single unit cell. When the octaconcatenated metasurface unit cells are activated, the antenna maintains a return loss of -10 dB across the full frequency range. Additionally, a significant transmission resonance of -18.78 dB is observed at 28 GHz, corresponding to a high radiative power level. The antenna generates a range of radiation patterns, with beamwidths varying between 13.3° and 24.7°.
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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 | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 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".