Novel Wideband Reflectarray Antenna Supporting Multiple V2X Links
Bibliographic record
Abstract
A novel circularly polarized (CP) wideband high gain reflectarray antenna (WHG-RA) is designed to cater to the requirements of future Vehicle-to-Everything (V2X) communication links. The WHG-RA offers a gain bandwidth spanning from 12 to 32 GHz, encompassing crucial V2X frequency bands, including vehicle-to-satellite (V2S) Ku/Ka downlinks and uplinks frequencies (12.25–12.75, 14.0–14.5, 19.6–21.2, and 29.4– 31.0 GHz), the 24.25-26.65 GHz range designated for vehicle-tovehicle (V2V) short-range radars, and all 5G millimeter-wave spectrums, such as n258 (24.25-27.5 GHz) and n257 (26.5-29.5 GHz), intended for vehicle-to-5G networks (V2N) links. The design of the wideband unit cell within the WHG-RA is rooted in a rotational technique grounded in geometric phase theory and has multiple resonances. As a proof-of-concept, a 180 × 180 mm² planar WHG-RA consisting of 900 unit cells is designed, fabricated, and rigorously tested across the 12 – 32 GHz frequency range. Both simulation and measurement results affirm the WHGRA's prowess, showcasing consistent radiation patterns, a commendable peak aperture efficiency (41.1%), a high gain of 30.3 dBi, and side-lobe levels (< −17.2 dB) averaged over 12 to 32 GHz, offering a substantial 3-dB and 4-dB gain bandwidths of 51% and 91%. These outcomes underscore the WHG-RA's potential to augment the performance and reliability of future V2X systems.
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How this classification was reachedexpand
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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, 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".