Beam Scanning in a Dual-Reflector Antenna with a Circularly Polarized Reconfigurable Sub-Reflectarray
Bibliographic record
Abstract
A beam scanning technique out of a circularly polarized dual-reflector antenna with a reconfigurable subreflector is proposed. The beam scanning is realized by taking the advantage of near-field focusing (NFF) property of the sub-reflectarray to realize displacement of the virtual source created by the subreflector in the vicinity of the main reflector focal point. Fewer phase adjustments are needed on the subreflector to reconfigure the beam compared to a single reflector system. This work experimentally demonstrates the beam scanning range of up to 6 degrees by implementing near-field focusing technique with the elliptical aperture dish as the main reflector with the projected diameters of$15.18 \lambda$and$10.11 \lambda(\lambda=42 \text{mm})$for the major and minor axes, respectively. A measured 3 dB gain bandwidth of more than 13% is obtained for the proposed system.
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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) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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".