Broadband Dielectric-to-Half-Mode Air-Filled Substrate Integrated Waveguide Transition
Bibliographic record
Abstract
This letter reports a broadband transition from dielectric-filled substrate integrated waveguide (DFSIW) to half mode air-filled substrate integrated waveguide (HM-AFSIW). The HM-AFSIW, demonstrated for the first time, is based on a multilayer printed circuit board (PCB) topology. Its fabrication involves three layers. The top and bottom substrates can make use of a low-cost standard substrate such as FR4. For our demonstration purpose, a back-to-back transition implementing a 10 mm-long HM-AFSIW operating over the entire$Ka$-band is fabricated. It achieves measured return loss of better than$-$15.9 dB and insertion loss of 0.79$\pm$0.25 dB (0.3$\pm$0.15 dB for the transition) from 26 to 40 GHz. This transition is of interest for interconnecting dielectric-loss-free components based on HM-AFSIW including, for example, leaky wave antennas.
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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) | 0.001 | 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 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".