Low-profile single-feed highly-directive antennas based on cavity-excited metasurfaces
Bibliographic record
Abstract
We propose a novel antenna design combining the simplicity of shielded Fabry-Perot leaky-wave antennas (FP-LWA) with the performance of antenna arrays. The device is based on a probe-fed shielded FP-LWA structure, with the standard partially-reflecting surface replaced by a metasurface. The cavity excitation is optimized to uniformly illuminate the aperture, forming radiating hot spots half-a-wavelength apart, while the metasurface imposes the linear phase required to promote directive radiation. This yields a probe-fed low-profile antenna with near-unity aperture illumination efficiency and no edge-taper losses. In previous work we have shown that a Huygens' metasurface can be used to that end; in this report we present an improved design featuring an omega-type bian-isotropic metasurface. The compact device structure (with respect to lens or reflector antennas) and the simple and efficient feeding scheme (with respect to antenna arrays) make these cavity-excited metasurface antennas very appealing for industrial applications, such as satellite communication or automotive radars.
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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 | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.001 |
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".