Tunable SIW Slot Antenna Constructed by High Permittivity Material
Bibliographic record
Abstract
A novel substrate integrated waveguide (SIW) bowtie slot antenna with tunable operation frequency is presented. The tunable is done by covering a high permittivity BST dielectric thick film into the radiation slot similar to a bowtie. The radiation frequency is sensitive to the variation of the dielectric constant of the Barium Strontium Titanate (BST) ceramic. Specifically, the return loss up to -36dB is observed at the center frequency of 6.07GHz when the dielectric constant of BST is 330. The center frequency shifts from 5.31GHz-7.17GHz when the dielectric constant of the BST increases from 490 to 180. Within the tunable frequency range, the antenna gains are more than 5dBi. The radiation patterns and the gains are almost not affected by the variation of the dielectric constant of BST, which shows outstanding features of this very compact and easy fabricatedtunable antenna. As a result, the presented anten-na has great potential for the applications in tunable frequency selection metamaterials devices.
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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 | 0.001 |
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".