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 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) | 0.000 | 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) | 0.000 | 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".