Single-Layer Dual-Band Polarization-Selective Metafilm With Independently Controlled and Closely Spaced Shielding Bands
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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 λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> /10 and λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> /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 1.3λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> × 1.7λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> at the lower band and 1.7λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> × 2.3λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> at the upper frequency band. The proposed design remains nearly transparent at other frequencies and/or for the orthogonal polarization.
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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 it