Microwave and Magnetostatic Characterization of Ferrite LTCC for Tunable and Reconfigurable SiP Applications
Bibliographic record
Abstract
The material property extraction techniques for an emerging commercial ferrite LTCC(Low Temperature Co-fired Ceramic) tape are presented. These properties are evaluated in the context of tunable and reconfigurable microwave components for wireless communications. Relevant parameters for microwave design, including relative permittivity εr, relative permeability μrand loss tangent tanδ, are presented. Measurements performed at 9.86 GHz and 27.2 GHz yield an εrof 13.6 and tanδ values of 0.004 and 0.001 respectively. For the first time, a completely embedded LTCC toroid transformer is utilized to extract the magnetostatic properties with greater accuracy than a solenoid transformer. These measurements reveal a saturation flux density of nearly 400 mT, a remanence of 250 mT, and a coercivity of 430 A/m. The peak relative linear permeability of the ferrite is 370. The low loss tangent and the high degree of variability of the ferrite properties with bias indicate its suitability for tunable and reconfigurable microwave SiP(System in Package) 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 | 0.001 |
| 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) | 0.001 | 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 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".