Parametric study of PBG ground planes in microstrip transmission lines
Bibliographic record
Abstract
Photonic bandgap structures (PBG) are periodic structures in 1, 2, or 3 dimensions which, can prevent the propagation of electromagnetic waves in certain directions for certain frequencies [1]. The properties of these structures are defined by their type of symmetry, material, and by the shape and period of the structure. These periodic structures can be drilled through the dielectric or etched in the ground plane. Etching of holes in the ground plane makes the design much simpler to fabricate. It has been shown that by etching circular holes in the ground plane of a transmission line, a filter can be created with a stopband that is a function of the period of the holes [2]. In this paper, the properties of PBG ground planes in microstrip transmission lines is studied in detail. The effective epsilon values are calculated and compared with simulated values. Finally, a new PBG filter with a wide stopband is shown along with the measurement results.
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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 | 0.001 |
| 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 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 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".