Loading Rims of Radio Telescopes with Reconfigurable Reflectarrays for Adaptive Null-Steering
Bibliographic record
Abstract
In an attempt to realize a concept presented in a precursor paper by the same authors, the design of a reconfigurable reflectarray providing a radio telescope with adaptive null steering capabilities is presented. The reflectarray occupies a paraboloidal annulus-shaped portion of the original reflector's surface. The remaining reflector surface and the reflectarray is modeled using reflection coefficients. The reflection coefficients for the reflector are set equal to -1. The reflection coefficients for the reconfigurable reflectarray are obtained from full-wave unit cell simulations of pin-diode-loaded patch antennas. The states of the switches required to drive a null in a particular direction are determined using a simple serial search algorithm. The reflection coefficients are related to a physical-optics-based current density. The current density can be integrated to obtain the far fields. An example of an 18m axisymmetric paraboloidal reflector antenna designed to drive a null to an angle of 1.75° from the axis of symmetry is provided.
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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 | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".