High Efficiency Octave-Band Feed Horn Antenna for Radio Astronomy Applications
Bibliographic record
Abstract
A novel multi step quad-ridged horn antenna (QRHA) with corrugations is demonstrated for operation over the 20 GHz to 40 GHz frequency range. The quad-ridged section is responsible for ensuring a wideband operation, whereas the corrugations support hybrid modes to obtain stable radiation patterns that taper to -16 dB at a half-angle beamwidth of 55° over the entire range. The multi-step profile improves efficiency by introducing higher order modes in the horn aperture, and shaping the sidewalls of the ridge horn contributes significantly to the radiation characteristics of the horns. To verify results, the horn is designed and simulated with both CST Microwave Studio and the μWaveWizard. Good agreement between the results of both software packages is observed which confirms the validity of this approach. The input reflection coefficient is mostly better than -20 dB over the entire frequency range, and an aperture efficiency of 75% to 80% is demonstrated.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 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".