A Passive Redirecting Van Atta-Type Reflector
Why this work is in the frame
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Bibliographic record
Abstract
The Van Atta retroreflector can be envisioned as a self-phasing antenna array; a phase gradient, naturally induced by an external incident wave, is inverted so the device reradiates back toward the incident direction. This letter demonstrates how to redirect the reradiated beam through passive alteration of this phase gradient. For this purpose, cross-propagating isolation is required between the incident and reradiated signal paths. To this end, polarization duplexing can be used to achieve this isolation with a passive and reciprocal structure. To provide further demonstration, a four-element redirective array is designed and fabricated to offset its reradiated beam by -15° from incidence. Performance is then verified using full-wave electromagnetic simulation and experimental radiation pattern measurements. It is found that the -15° angular offset is effectively retained over a wide range of incidence angles.
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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 it