Wideband Air-coupled Piezoelectric MEMS Ultrasonic Transceiver
Bibliographic record
Abstract
Piezoelectric micromechanical ultrasonic transducers (pMUTs) operating in air have received great attention for airborne applications. Indeed, air-coupled pMUTs have lower resonant frequencies and unfortunately suffer from low fractional bandwidth. This study proposes a novel geometry for pMUT transceivers which can be fabricated using standard bulk micromachining processes. The proposed design consists of four standalone triangle-shaped flags, each positioned adjacent to the other with a mirrored orientation and an air gap size of 2 μm, forming an overall square configuration. The design is fabricated using a commercially available PiezoMUMPs process. The performance of the pMUT in both receiving and transmitting of ultrasonic waves is evaluated. Experimental results show a resonant frequency of 200 kHz and a fractional bandwidth of 30%.
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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".