Cryogenic performance of gold-based and niobium-based RF MEMS devices
Bibliographic record
Abstract
This paper presents the results of a comprehensive study on the performance of RF MEMS devices at cryogenic temperatures. More than 50 shunt capacitive RF MEMS switches are tested at room temperature (294 K) and liquid nitrogen temperature (77 K). The switches have various supports. The variation of the actuation voltage of each switch at room and cryogenic temperatures is investigated by mechanical simulation. The results show that the type of supports significantly affects the switch actuation voltage. In fact, depending on the shape of the supports the actuation voltage can decrease or increase at cryogenic temperatures. The hypothesis obtained from the analysis of the gold-based RF MEMS devices is confirmed by testing superconducting niobium-based RF MEMS devices, at liquid helium temperature (4 K). The RF performance of a capacitive shunt niobium-based RF MEMS switch and a niobium-based RF MEMS varactor show significant improvement of the insertion loss of the switch and an enormous enhancement of the quality factor of the varactor.
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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".