Single-Layer Dual-Band Polarization-Selective Metafilm With Independently Controlled and Closely Spaced Shielding Bands
Bibliographic record
Abstract
This article presents a highly compact metafilm structure with two closely spaced and independently controlled shielding bands. The constituent unit cell is a composite of two different single-band metafilm unit cells realized by the application of a meandered-loop resonator and a mu-negative and near-zero (MNNZ) metamaterial liner, respectively, to a metallic disc resonator. Both liners introduce frequency-reduced resonances resulting in highly subwavelength unit cells. The composite dual-band unit cell undergoes resonances at sizes of λ0/10 and λ0/8 in two operating bands, where it exhibits a fano-shaped reflection profile. The unit cells are closely packed and constructed on a single metallic layer, resulting in a compact and low-profile metafilm design. Furthermore, due to the use of two separate and noninteracting resonance mechanisms, the operating bands are highly selective, can be spaced very close to each other, and may be controlled independently through the design of the individual meandering and MNNZ elements. We present simulation data, extraction of susceptibility tensors using generalized sheet-transition conditions (GSTCs) as well as experiments confirming a dual-band, polarization-selective shielding response using a compact metafilm structure measuring 1.3λ0× 1.7λ0at the lower band and 1.7λ0× 2.3λ0at the upper frequency band. The proposed design remains nearly transparent at other frequencies and/or for the orthogonal polarization.
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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 | 0.001 | 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".