Resonance-cone propagation in continuous transmission-line grids and microwave applications
Bibliographic record
Abstract
This thesis presents a novel approach to synthesizing a hyperbolically dispersive metamaterial by forming a continuous (unloaded) periodic transmission-line grid with rectangular unit-cells over a ground plane. The dispersion properties of the hyperbolic grids are examined by performing periodic analysis. The hyperbolic dispersive effects occur in second and higher order harmonic bands because the periodicity of the grids is on the order of half-wavelength. Frequency-dependent phenomena associated with the hyperbolic dispersion such as resonance-cone formation and their negative refraction and focusing, are demonstrated by plane-wave and circuit simulations, and are experimentally verified in microstrip-based grids. It is shown that by exploiting the unique dispersion characteristics of the grids, spatial-filtering electromagnetic devices such as passive spectrum analyzers, multiplexers and demultiplexers can be designed. Representative microwave devices including a 3 GHz/6 GHz harmonic splitter and a 5.8/6.2 GHz diplexer are designed and practically implemented. Since these grids are synthesized by simply printing transmission lines, they are easy to fabricate at a low cost and are potentially scalable to millimeter and Tera-hertz frequencies.
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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".