Bibliographic record
Abstract
Focal plane arrays (FPA), integrated into total power antennas, are noted as a desired technology for ALMA development during the 2030s. For full compatibility with ALMA, a dual-linear, sideband-separating (2SB) architecture is necessary. We report on a conceptual design that uses a “unit cell” approach for the front-end 2SB block using waveguide. Each pixel uses a turnstile OMT for linear polarization, hybrid-tees for isolated power division and higher mode termination, and hole couplers for LO injection. A 5-layer quasi-platelet layout is used such that the “unit cell” is replicated to facilitate arrayed designs. Mixers are separately housed within a simplified DSB mixer block (using standard split-block) that allows for separate mixer qualification. In collaboration with ASU, a waveguide hybrid-tee, scaled for ALMA Band 6, is currently under development to explore the machinability and performance of the component itself, and the notion of using platelet designs at Band 6 frequencies.
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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 | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.006 | 0.003 |
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".