A Honeycomb Mesh-Type Reflectarray with High Optical Transparency for Millimeter-Wave Applications
Bibliographic record
Abstract
An optically-transparent reflectarray (RA) operating at 28 GHz, based on a honeycomb metal-meshing scheme and fine metal line (FML) structures, is proposed. The RA unit cells consist of hexagonal rings with linewidths of <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$50 \mu \mathrm{m}$</tex> and a 1 mm -thick fused silica <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\left(\varepsilon_{\mathrm{r}}=4.0\right)$</tex> substrate backed by a metal ground plane with perforations in a honeycomb pattern. Additional punctures in the mesh are created in between each honeycomb perforation to further enhance the transparency. The unit cell uses two different hexagonal ring elements to achieve a wide phase range of 298°. Across the various unit cell ring geometries, a peak return loss of 0.77 dB is realized. Simulations of 1D and 2D RA structures are demonstrated using Ansys HFSS. The 2D RA achieves a peak gain of 19.2 dB with a sidelobe level (SLL) of -19 dB. The overall RA structure achieves a transparency of 85.1% and may be integrated with infrastructure such as glass panels to improve signal coverage.
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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 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| 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".