Low‐loss and broadband coaxial line to air‐filled substrate integrated waveguide transition
Bibliographic record
Abstract
This Letter introduces a low‐loss and broadband coaxial line to air‐filled substrate integrated waveguide (AFSIW) transition for the first time. The fabrication of this transition involves three substrate layers. The inner conductor of the coaxial line is connected to the metal layer of the lower substrate and its outer conductor is connected to the metal layer of the upper substrate. This transition uses a taper‐shaped configuration at the end of the line to achieve the better impedance matching and wider matching bandwidth. In the previously reported AFSIW components, several transitions are used to transform the transverse electromagnetic mode of the coaxial line to the TE mode of the AFSIW structure. By using the proposed transition, these extra transitions are eliminated, which leads to the size and loss reduction of the structure. For validation purposes, a prototype of the back‐to‐back coaxial line to AFSIW transition is fabricated and measured for the entire C‐band. The simulated and measured results are in good agreement. The proposed transition achieves the measured insertion loss of 0.55 0.5 dB (0.28 0.25 dB for the transition) and return loss of better than from 4 to 8 GHz.
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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 | 0.000 |
| 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) | 0.000 | 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".