Meandered H-Shaped Slot-line Quad-Band Frequency Reconfigurable MIMO Antenna
Bibliographic record
Abstract
In this paper, we have proposed a miniaturized meandered slot-line based quad-band multiple-input-multiple-output (MIMO) antenna system. The proposed design consists of 2-elements meandered slot-line antenna with an H-shaped configuration. The antenna is made frequency reconfigurable using varactor diode by reactively loading the slot structure. The quad-band antenna design is reconfigurable over all the resonating bands. The meandered slot-line structure with reactive loading resulted in a size reduction of 94% as compared to conventional patch antenna and 36% compared to meandered slot antenna. The proposed antenna design operates in the frequency bands from 0.665–1.13 GHz, 1.415–2.005 GHz, 2.42–3.09 GHz and 3.18–3.89 GHz bands, thus covering most of the modern communication standards. The proposed 2-element design is fabricated on a substrate board of dimensions 60×120×0.76 mm3 using an RO4350 substrate. The proposed design is well-suited for wireless handheld devices to be used in the second generation cognitive radio (CR) front end applications.
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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 | 0.001 | 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".