<scp>Ultra‐wideband</scp> fluidically steered antipodal Vivaldi antenna array
Bibliographic record
Abstract
Abstract An ultra‐wideband 1 × 4 antipodal Vivaldi antenna array with microfluidic beam steering is reported. The antipodal configuration is selected for its microstrip feed line, which is convenient for implementation of the phase‐shifting structure. Each antenna element uses a true‐time‐delay phase shifter consisting of nine microfluidic channels under its feed line in which deionized (DI) water, ɛ r = 77 + j13 (tanδ = 0.17) at 3 GHz, is pumped to change the speed of the propagating wave. The array was fabricated using a 1.52 mm thick substrate with ɛ r = 3.55 and tanδ = 0.0027. Each antenna element and phase shifter measures 55 mm × 140 mm. Measurements show that the array yields up to 90° of beam steering from 3 to 6.5 GHz and up to 40° of steering from 6.5 to 10 GHz. The array has a maximum realized gain of 13.1 dBi, and a half‐power beamwidth of less than 40° for all configurations.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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".