Multiband Distance Measuring Equipment, Traffic Collision Avoidance System and Radio Altimeter Antenna for Avionics Applications
Bibliographic record
Abstract
A multiband antenna is presented for aircraft communication of traffic collision avoidance system (TCAS), distance measuring equipment (DME) and radio altimeter (RadAlt). This single antenna concept provides benefits of reducing the number of mounted antennas on the aircraft. Dual and single feed multilayered antennas are designed for omnidirectional and directional radiation characteristics. A circular metallic covered low profile L-band cavity is designed for omnidirectional radiations that comprises a novel power splitter for feeding the C-band RadAlt patch array placed on upper substrate of the circular cavity for achieving directional radiation pattern characteristics. An electromagnetic bandgap (EBG) layer is designed and placed within the circular cavity for suppressing RadAlt signal propagation within the cavity. The L-band is realized from 0.954 GHz to 1.272 GHz for the applications of DME, TCAS and ADS-B with omnidirectional pattern and gain of more than 5 dBi. C-band of 4.06 GHz to 4.52 GHz is achieved for RadAlt with directional pattern and gain of more than 12 dBi and sidelobe levels of less than -40 dB. The proposed antenna was fabricated and tested in an anechoic chamber and flight testing for the verification of radiation characteristics.
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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 | 0.000 |
| 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 | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.002 |
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".